Apple SCSI & RAID Devices Driver Download

SCSI Apple adopted a version of the Small Computer System Interface (SCSI), debuting it on the Mac Plus in early 1986. It remained on Mac models through the Mac SE and Mac II. SCSI advantage was.

Reading PowerBook 2.5″ SCSI Hard Drives

Back in the 68k era Apple used small form factor 2.5″ SCSI hard drives in the PowerBook 100, 500 and Duo lines of notebooks. Use of the SCSI format provided compatibility with desktop Macs of the same era and permitted the use of external SCSI Disk Mode – the precursor to today’s Target Disk Mode.

I've read that the Sider was SASI (the forerunner of SCSI) and that the RamFAST card by Sequential Systems would be a good choice for a controller (assuming I can find one). I've also read that Apple produced a SCSI controller for the //e and //gs but I am uncertain if that card would work with a SASI drive (assuming the drive is SASI). Adaptec SCSI RAID 2200S Low-profile dual-channel Adaptec SCSI RAID 2200S is a 64-bit/66MHz Ultra320 RAID controller designed for mid-range and high-density servers. Advanced features include Adaptec's optimized disk utilization, Online Capacity Expansion, RAID Level Migration and full OS support.

The 2.5″ SCSI form factor was not widely used throughout the industry, however. Most vendors (and soon Apple themselves) utilized ATA (IDE) drives. ATA remained the industry standard until SATA took over this past decade.

Occasionally somebody with an old SCSI-based PowerBook will contact me about transferring files from their old system. If their PowerBook doesn’t boot, or the drive was previously removed from the computer, it becomes necessary to access the disk directly.

The scarcity of the 2.5″ form factor means that there aren’t many ways to read old PowerBook hard drives without having to install them in another PowerBook. A few external SCSI enclosures were made for this size but they can be hard to find today. Installation is not super difficult in the old models, but it isn’t trivial either. A sacrificial model is needed for the endeavor (I use a PowerBook 170, as shown). If the drive doesn’t boot your PowerBook you need to startup from a System Folder on an external SCSI drive in order to access the internal disk.

Another recent file transfer request got me searching for an external enclosure or adapter of some kind. After a fair amount of Googling I finally found a 40 54 pin (2.5″) to 50 pin (3.5″) SCSI adapter. This allows access to the smaller drives using a standard 50 pin ribbon cable and a 4 pin 5V/12V power cable.

I used the cabling from an external case to make an even more versatile adapter. The piece of ribbon cable has a 50 pin internal connector sandwiched between two external Centronics-style SCSI connectors. With this new rig and power provided by my external drive sled, I’m now able to connect old 2.5″ disks directly to my trusty Wallstreet’s SCSI port and bridge the years without having to put my 170 into traction each time.

Apple Scsi & Raid Devices Driver Download Windows 7

A much needed little adapter!

Update 2012:
After posting this update I acquired an external disk enclosure for 2.5″ SCSI drives. Once you remove the covers from these enclosures the remaining circuitry forms an adapter (or “sled” if the bottom panel is still attached) to use to connect bare internal drives to external SCSI connectors – in this case a standard DB25 SCSI cable. This is smaller and easier to deal with than the hybrid adapter described above, and has become my main PowerBook data transfer drive tool. 2.5″ external SCSI disk enclosures are occasionally available on eBay.

Posted by Adam Rosen on July 18th, 2010 in Vintage Mac Museum Blog 36 Comments »

Vintage Macs Live Again for The Macintosh Way »
  1. I just cracked open my PowerBook Duo 230 to remove the hard drive to recover some data that I never transferred from it. I have followed the links provided and have not found the products that are required.

    What I want to do is convert from the scsi to usb is this possible? I want to be able to do is simply mount the drive much like an external is this feasible?

  2. This article has been very helpful, I have an old 40-pin SCSI from a PowerBook that I want to interface with my Mac IIci. Following the link in your article I found that the 54-pin to 50 pin SCSI is available. If that is the correct adapter then all I need are cables for a DB-25 SCSI plug.

  3. I have assembled the adapter to connect my old PowerBook drive, although the connector is not quite deep enough to fully engage the pins on the drive. Any suggestions on a fix?

  4. Another question, with this adapter how do I manage the SCSI ID?

  5. There are a group of pins to one side of the connector, otherwise I don’t see anything else on the drive.

    My need for the drive is temporary, provide an intermediary to copy files between the IIci and my PC while finish translating old documents to PDF.

  6. Okay, I was able to start the drive and install the microtech software. The USB interface was detected by windows XP though not identified. I installed the microtech software without errors. On reboot after install, the USB interface was not detected. I checked the hardware status and saw that the USB driver was not loaded.

    Can you offer any suggestions on troubleshooting?

  7. Thank you. I will also contact Microtech and see if they have ideas.

  8. While testing out my adapter, I noticed a LED on the SCSI adapter plug that connects to the drive. Should this light up while the drive is running?
    Also, have you seen a powered SCSI terminator before, looks like the Microtech USB adapter needs a power source.

  9. I found two problems with my interface, I needed to add termination to the drive and the drive is not supplying power to the Microtech adapter. I have switched to a cardbus adapter and added a thru-terminator to the drive.

  10. I am trying to connect several SCSI drives to the my Windows XP machine via an Adaptec USBExpress adapter. The drives are accessible in system 7 though I cannot get the adapter drivers to load. I wondered if you had encountered similar problems.

  11. I have a Mac IIci with an ailing internal drive. I may be able to fix it. Although I am considering using the SCSI powerbook drive as a replacement. I have the adapter board for it, although how do I terminate it and set the SCSI id?

  12. I have a PowerBook SCSI drive with the adapter, can this be installed and formatted to work on a MacIIci running System 7?

  13. I also have a Mac IIci and a conner CP-2045 Powerbook drive and have been trying to get it up and running at least temporarily. I have an inquiry in with cables online WRT their laptop adapter.

    Adam, you have this setup running so I hope you can answer a couple of questions, first, the drive implies no jumpers are necessary for SCSI ID=0 using the adapter as an internal drive, so this is OK? Also, how does the adapter handle the termination issue?

    Last, why would you not recommend this setup for long term usage (per above)?

    Tks D.

  14. Thanks Adam

    I’m leaning toward the SD approach for a long term solution but since I have the 2.5″ HD I’d also like to keep that option on the table or at least understand the issues.

    I have a dual centronics + 50 pin cable exactly like the one in the photo that I can use with the 2.5 to 3.5 adapter card, did you terminate your setup with something like the in-line centronics pass through terminations?

    I have also made an adapter cable matching the pinouts for 40 & 50 pin SCSI & the Apple PB cable. The only questions I have is handling the non-power grounds. I connected the necessary 2.5″ grounds (identified from the Apple cable) to convenient grounds in the even number pins of the 50 pin side.

    So far I haven’t gotten the Mac to find the HD; internally, without & with termination, and externally with & without termination. Termination was using a centonics connector + terminator in the ribbon between the HD & 50 pin connector.

    Any suggestions?

    Tks. D

  15. Hi – I found my old Powerbook Duo 230 (I got rid of the Dock years ago). It works perfectly. In fact, my little niece and nephew had turned it on and were playing games on it. I had a bunch of old word docs saved and I deleted them, but realistically if I want to give this away/sell it/do anything with it, do I need to acquire an external drive and the operating system floppy to reinitialize the hard drive (for safety/security reasons)?


  16. i have a powerbook duo 270c which i have owned for over 15 years.
    it runs on OS 7.6
    it has been working well and i usually boot it up a few times a year.
    However recently it wont boot up. When i connect it to the ac, it tries to power up without me pressing the power button.
    it gets to the MAC OS logo on start up and then switches off. This happens even if i do use the power button
    Not sure if it is a hard drive failure?
    I do not have OS7 on floppy disk to try to boot up this way. I do have OS7.6 on CD but I did not have a cd player i can use with this machine.
    any suggestions?

  17. thanks Adam. will give it a try

  18. Looking for a Mac classic compatible hard drive; eBay has a few. Are there other sources?

  19. Hi Adam. I have an old PowerBook Duo 230 and a PowerBook 1400cs. The HDDs still work in both of them, and I wanted to take them out and plug them into my Linux box so I can use the dd command on them to make an image of their contents.

    I wanted to plug the drives into the Linux computer via USB. What I am wondering is, can you give me a list of the things I need to buy to do this? All of the links I’ve seen here are dead, and I don’t know if I need that one CablesOnline adapter in my case.

    Thanks, and great article!

  20. Hello
    Can you ask for Scheme 2.5 “Laptop SCSI Hard Drive Adapter
    Item # MK-007 because they do not send an adapter to Poland.
    Thank you

Leave a Reply

.The official Csa2 (comp.sys.apple2) Usenet newsgroup Apple II FAQs originate from the.II Computing Apple II site,1997-2017. Csa2 FAQs text file ref. Csa2HDNSCSI.txt rev225 December 2016

Hard Disks & SCSI Interfaces
. ......
also see CD-ROM and Zip Drives

001- How difficult is it to add a hard drive to my IIgs?
002- What kinds of hard drive systems are available?
003- What do SCSI ID numbers mean?
004- What is 'SCSI-2' and how is it different from SCSI-1?
005- Will a SCSI-2 hard drive work with an Apple II system?
006- Will my Rev. C SCSI Card work with a SCSI-2 drive?
007- What is SCSI 'termination power'?
008- Can I avoid the 'RamFAST/SCSI is searching SCSI bus' delay?
009- What is the pinout for the standard 50-pin SCSI cable?
010- What's the SCSIHD.DRIVER patch to ignore DRIVER43 partitions?
011- What is the 'bad bug' in the ROM 3.01e RamFAST?
012- What are correct HS SCSI settings, etc. for a Bernoulli drive?
013- What are the settings for a CMS hard drive controller card?
014- Does it matter when I power-ON my SCSI hard disk?
015- Can I leave SCSI devices I'm not using turned OFF?
016- Is there a generic SCSI tutorial available for downloading?
017- What is the correct time-out setting for a Focus hard drive?
018- How do I modify my Apple SCSI card to supply Termination Power?
019- Can I get a Focus drive bigger than a couple hundred MB?
020- My hard disk is on a CMS SCSI. How do I install System 6.0.1?
021- How is DMA set for SCSI cards with 8MB RAM cards on the GS?
022- My 20MB Focus bombs and there's some goo on the card. A fix?
023- Where can I find the RamFAST manual on the net?
024- How can I tell which Apple SCSI card I have?
025- Where can I find Profile maintenance and formatting info?

From: Bradley P. Von Haden

001- How difficult is it to add a hard drive to my IIGS?

Adding a hard drive is not much of a problem. Usually, you will need to insert
an interface card, possibly connect a cable or two, and change a Slot setting
in the Control Panel Desk Accessory.


002- What kinds of hard drive systems are available for Apple II

The most versatile and most common hard drive set-up is an internal SCSI
interface card and an external SCSI drive. Hard drives, cd-rom drives,
removable media (SyQuest, Iomega), flopticals, and scanners all can be added to
the SCSI chain. Insert the card in a slot, connect a cable or two, and change
a slot setting.

The preferred SCSI card is the RamFAST Rev. D SCSI card from Sequential
Systems. The next best card is the Apple Hi-Speed SCSI card.

Here are some RamFAST notes:

- faster than Apple Hi-Speed, especially in ProDOS
- provides termination power to the SCSI chain
- allows partitions to be mapped in ProDOS
- device drivers come on the card in the upgradeable ROM chip
- allows up to 8 devices to be added to the chain
- allows up to 12 partitions to be active at any one time
- allows up to 12 partitions per drive
- about $130 new

Here are some Apple High Speed notes:

- no longer produced or supported by Apple
- does not provide termination power to the SCSI chain (can be
modified to provide termination power)
- does not allow partitions to be mapped in ProDOS
- device drivers are software
- allows up to 7 devices to be added to the chain
- allows over 100 partitions to be active at any one time
- allows up to 20 (?) partitions per drive
- about $110 new (if still available)

For the hard drive itself, look for a SCSI drive in an external
enclosure with the following features:

- 30 day money-back guarantee
- external SCSI ID switching
- dual 50 pin SCSI connectors
- no or switchable termination (use an external terminator at
end of SCSI chain)
- switchable termination power (on/off) is a plus for users of
SCSI interface cards which do not supply termination power


From: Rubywand

Another way to go is a 2.5' IDE drive mounted on an IDE interface card.
This 'hard card' plugs into a Slot-- usually Slot 7. Alltech sells the Focus
Hard Card in varying sizes (e.g. 60MB for $99) with system software installed.
SHH Systeme offers the FileCard (about $170 + cost of drive) as well as a
series of IDE controller cards to which you can add a 2.5' IDE drive (about
$120-$170 including mounting kit).

The IDE hard card approach offers speed and capacity comparable to SCSI,
very easy installation, and, it eliminates hassles with external boxes and
cables. Of course, you will still need to add a SCSI interface card if you want
to connect a SCSI CD-ROM and/or Zip Drive.

Note: If you want your system to include a SCSI CD-ROM drive, it is best to
have a SCSI Zip Drive or SCSI hard disk connected to the SCSI interface, too.
This provides a write-able medium for saving SCSI interface card setup parms.


From: Rubywand

003- What do the SCSI ID numbers mean?

SCSI ID numbers identify devices on the SCSI chain. Each device should
have its own, unique ID number in the range 0-7. (If two devices on the SCSI
chain have the same ID number, there will be a conflict and your system will
not function correctly.) Higher numbered devices have higher priority-- get
'looked for' first-- so, it is standard practice to set the device you boot
from to 6 or 7.

Most external SCSI devices have a thumbwheel switch, slide switch, or
jumper block on the back to set ID number. Some, like the Creative x2 CD-ROM
drive let you click through 0-7. The Zip Drive lets you pick 5 or 6. (By the
way, SCSI ID numbers have nothing to do with which Slot the SCSI interface card
is in.)

Apple SCSI & RAID Devices Driver Download


From: David Empson

SCSI ID 7 is usually special because the Apple SCSI and Hi-Speed SCSI
cards count as a device set to ID 7 by default (and every Macintosh has a
hard-wired SCSI ID of 7). The only thing that is special about ID 0 is that it
is the standard ID used for an internal drive on a Macintosh.

There is no problem using SCSI ID 0 on an Apple II. On a RamFAST SCSI
card, it is also safe to use SCSI ID 7 for a drive. The RamFAST doesn't have a
SCSI ID, but every other SCSI card does.


From: David Empson

004- What is 'SCSI-2' and how is it different from SCSI-1?

For hard drives, 'SCSI-2' basically means that the drive supports a stricter
command set. The physical interface is usually identical.

For other device types, 'SCSI-2' means a lot more, because the original SCSI
standard didn't define much in the way of device types and command sets, so
most devices use proprietary command sets. SCSI-2 standardises the command sets
for most types of devices.

There are three special types of interface that you might see mentioned:

'Fast SCSI' supports data transfer at twice the speed of the original SCSI
standard (10 MB per second vs 5 MB per second). This will not be a
compatibility issue, as it is just the maximum transfer speed supported by the
drive. The Apple II cannot transfer more than one megabyte per second.

'Wide SCSI' uses a different cable arrangement to double the width of the
data path (16 bits instead of 8 bits). A wide SCSI drive cannot be used with
an Apple II, unless it can also operated in 'narrow' mode with the original
50-pin connector. (There is also 'Fast Wide SCSI', which doubles the data
rate and the width of the bus.)

'Differential SCSI' involves a different type of interface to the computer,
where every data signal has a balanced positive and negative pair of wires,
rather than a single wire and a ground line. I believe it has a different type
of connector. Differential SCSI drives cannot be used with an Apple II.'

Some drives use a proprietary connector, but the standard (narrow,
non-differential) SCSI bus uses the same 50-pin connector for SCSI-1 and

The only significant problem you might run into is termination, and supply of
termination power. SCSI-2 devices tend to be fussier about termination than
older devices.


005- Will a SCSI-2 hard drive work with an Apple 2 system?

Usually, yes. I'm on my second Quantum drive that is described as

There is a major caveat to this answer. Some newer drives require a host
which implements the arbitration phase of the SCSI communication dialogue. The
RamFAST doesn't do this, and as a result there are some drives that cannot be
used with a RamFAST SCSI card. A notable example is the Quantum Fireball
series. However; the Trailblazer and all older Quantum models work fine.



006- I have a plain ol' Rev. C SCSI Card, will this work with a
SCSI-2 drive?

My Quantum LPS240 is working fine on an original Apple SCSI card.

Note: With the original Apple SCSI card, the card itself is not terminated, so
if you are connecting more than one device, you need to add a second terminator
between the computer and the first drive (using a 'pass-through' external SCSI
terminator, or internal termination on the first drive).

007- What is SCSI 'termination power'?

At least one device (SCSI card or any SCSI drive) must provide power for
the SCSI terminators by feeding 5 volts onto the TERMPWR line on the SCSI bus.

Usually, termination power is fed through a diode to prevent backfeeding
from a higher voltage source in case some other device is also supplying
termination power. A good implementation will have a fuse to protect against
shorts and a capacitor to cope with a sudden rise in termination power drain.

The Apple SCSI cards do not provide termination power (though some recent
Apple Hi-speed SCSI cards were modified by Apple to provide termination
power). The RamFAST SCSI card can supply termination power.

If a drive can supply termination power, I recommend letting it do so. The
TERMPWR line can, in some cases, represent a significant load on the +5V rail
going to the Slots. Both of my Quantum drive mechanisms provide termination
power to the SCSI bus, avoiding the need to supply it from anywhere else.


From: Rubywand

On the RamFAST SCSI RevC card, DIP switch #1 is set to ON to supply
termination power. On other RamFAST SCSI cards, a jumper is placed at JP1 to
supply termination power.

According to RamFAST documentation, it is okay to have the card set to
supply termination power whether or not another device does with a few notable
exceptions. If a connected hard disk (e.g. a Sider drive) has a sticker saying
that the drive supplies termination power and that the interface must not, then
the RamFAST must be set to _not_ supply termination power.


From: LJSilicon

008- I just reinstalled System 6.01. Now every time I cold boot
I get this message 'RamFAST/SCSI is searching the SCSI bus
for devices..etc.' and have to wait several seconds. WEIRD?!

When you reinstalled the software, the RamFAST set itself for a long
search. This is an option that you can change using the RamFAST utility. What
it is doing is giving your scsi devices a chance to spin up. If you want a fast
check, go to the options menu on the utilities and reset the Short Timeout
option there to 'YES'.


From: David Empson

009- I would like to make my own SCSI cable. Does anyone on csa2
know the pinout for the standard 50-pin SCSI cable?

The cable pinout is documented in the technical reference manual for the
Apple High-Speed SCSI card (and the original one as well).

This pinout is not a simple mapping from one end to the other.

Microsoft Scsi Driver

I repeat that it is NOT easy to make one of these yourself. Apart from any
issues of wiring errors, you also need a properly shielded cable to minimise
noise being picked up or radiated. You should definitely not use a ribbon

Here is the pinout, assuming I haven't made any typos (I can't see any).

DB-25 50-pin Function

1 49 -REQ
2 46 -MSG
3 50 -I/O
4 45 -RST
5 44 -ACK
6 43 -BSY
7 16,18,19 Ground lines
8 26 -DB0
9 20,21,22 Ground lines
10 29 -DB3
11 31 -DB5
12 32 -DB6
13 33 -DB7
14 1,2,3 Ground lines
15 48 -C/D
16 4,5,6 Ground lines
17 41 -ATN
18 7,8,9,11 Ground lines
19 47 -SEL
20 34 -DBP
21 27 -DB1
22 28 -DB2
23 30 -DB4
24 23,24,25 Ground lines

The unlisted pins in the 50-pin connector (10, 12, 13, 14, 15,
17, 35, 36, 37, 39, 40, 42) are ground.

Note: the numbers for the 50-pin connector are counted along each
row, like a DB-25. They are NOT the wire numbers in a ribbon cable.


From: Steve Reeves

010- Is there some patch for SCSIHD.DRIVER to make it ignore
APPLE_DRIVER43 driver partitions?

Yes; you can change the counter in the string comparison routine that
checks for the 'Apple_Driver' partition type string so that it only checks the
first 12 characters. This counter is at byte $3574 in the System 6.0.1
SCSIHD.DRIVER file and is originally $1F. Change this to $0B and the driver
will then ignore 'Apple_Driver43' partitions.

If you make this or any other patch to the driver, I also you recommend
you bump up the version number. Change byte $01FF from $10 to $2E (for version
6.02 experimental).



from Harold Hislop

011- Someone told me there's supposed to be a bad bug in the
ROM 3.01e RamFAST. What is it?

Don't use the built in backup/restore in 3.01e!!! The restore opeation
will nuke the partition map on the drive being restored to, as well as all
existing partitions on that drive!


From: Bradley VonHaden

012- What are correct HS SCSI settings, etc. for a Bernoulli drive?
My system is as follows:

ROM 1 Apple //gs
4mb AE RAM card
8mhz ZIP GS
Apple High-Speed SCSI card
90 mb Bernoulli hard drive
System 6.0.1

Three things I can think of to check:

One possibility is DMA compatibility. If your memory card is not DMA
compatible, then switch 1 on the Apple HS SCSI card should be open (up).

Another possibility I guess is a SCSI ID conflict. The Apple HS SCSI card's ID
at the factory is set to 7. Here are the Apple HS SCSI card switch

note1: Switch 1 controls DMA; open (up) turns DMA off
note2: Switches 2-4 control SCSI card ID
note3: 'U' means open (up), 'D' means closed (down),
'z' means Set for correct DMA (see note1)

SWITCH: 1234 1234 1234 1234 1234 1234 1234 1234
CARD ID: 0 1 2 3 4 5 6 7

Third, the scsi chain needs termination power to work properly. This is
different from termination. Both are required for a properly functioning scsi
chain. It is possible that neither the Bernoulli drive nor the Apple HS SCSI
card is supplying termination power. If this is the case, and there is no
other device on the scsi chain to supply said power, it probably won't work.
There is a modification (requires soldering skills) to the Apple HS SCSI card
to make it supply termination power.


From: Jack Countryman IAC

013- I want to configure a CMS hard drive controller card to run a
20 meg drive for a //e. Could someone supply info on settings?

According to the CMS manual for the 1990 ROM, the six sets of eight pairs of
jumpers (u1....u6) are for the following purposes.

Note: This description of the jumpers is only true for the 1990 ROM. On the
1987 ROM the jumpers have a different usage.

/ u 1 u 2 u 3 u 4 j2

u 5 u 6
___________________________________________ j1


u 1: Boot Scan delay....manual shows no jumpers here in default

u 2: first (left) jumper is 'Enable I.C.P. (Yes/No)', middle 6 not
used, last (right) is 'multiple initiators (Yes/No)'...manual
shows no jumpers in default configuration

u 3: Selection phase time out delay....I believe this sets how long
the card waits for the drive to come up to speed(?)...manual
shows the default as having 4, 5, and 7 with jumpers installed

u 4: Arbitration phase time out delay....manual shows default as no
jumpers installed

u 5: Bus Free phase time out delay...manual shows default as jumper
on number 1

u 6: Interrupt recovery delay....manual shows jumpers on 3, 4,
and 5

J1 and J2 are single sets of pins. The manual says J2 is not used,
but J1 is to be jumpered.

The card I have here, came out of a IIGS where it was hooked to first a
twenty meg CMS drive, and later a forty meg CMS drive. It has the following
jumpers set (for use with 1990 ROM only):

u1: jumper on 7
u2: no jumpers
u3: jumpers on 4, 5, and 7
u4: no jumpers
u5: jumper on 1
u6: jumpers on 3, 4, and 5
j2: no jumper
j1: jumper

As I recall, this setup yeilded a rather long pause for the hard disk to
come up to speed (about 40 to 45 seconds) that we found necessary at the time
to avoid boot problems.


From: Andrew Roughan

The CMS SCSI card has three ROM revisions.

The 1987 ROM uses jumpers on the card to define the
partitions on the drive. These partitions cannot be
greater than 32MB and only two partitions are
supported. The manual should be considered a MUST

The 1989 ROM is similar to the 1987 ROM in
functionality, but it has an annoying habit of
shutting down the drive after a period of inactivity.
It needs an access attempt to start it up again, but
this access will return a failure error code (ok when
you can redo the action but not too good otherwise :).
A plus in its favour is that the jumper settings are
available from the utility software. Because of this,
the manual is not a necessity.

The 1990 ROM gets around the problem of jumper based
partitions by assuming that each partition on the
drive will be 32MB (or as much as is left less than
32MB). This ROM will therefore support > 60MB of
storage on multiple drives. The drawback is that only
two partitions can be accessed at a time. The ROM
supports switching them in and out at boot time (hold
down the Open Apple key). The jumper settings are once
again available in the utility software.

For the sake of compatibility with the Apple Partition
Map, (do you wish to use the same drive on a RamFAST
or Apple SCSI card? or on a Macintosh?) the CMS SCSI
card should not be considered.

However if you just wish to access one 60MB SCSI hard
drive from an Apple II, then the CMS card will do the
job well.

The CMS SCSI card has one advantage over the RamFAST
and Apple SCSI cards. It can be used to share a hard
drive between computers. For example it is possible to
use two 1989 ROM cards (in an Apple //e and a //gs) to
share a 60MB drive with a second //gs which has a 1990
ROM card.

The CMS utilities disks for all ROM versions are
available on the following mirror of the ground


I also scanned in the manual for the 87 ROM and currently host it here:

The manual is also available on GSWV at
http://apple2.org.za/gswv/a2zine/Docs/ .

From: B.J. Major

014- Does it matter when I power-ON my SCSI hard disk?

From the Apple IIgs Owner's Reference, page 267:

'In order for the Finder to recognize a hard disk, the hard disk must be
switched on and up to speed before you start up (or restart) the computer.
Switch on the hard disk, wait about 10 seconds for it to come up to speed, and
then restart the computer.'

From the Macintosh User's Guide for desktop Macs, page 216:

'IMPORTANT: Always turn on any external SCSI devices connected to your
Macintosh before turning on the computer itself. Otherwise, your computer
cannot recognize the SCSI devices.'


From: Randy Shackelford

015- Can I leave SCSI devices I'm not using OFF when I
turn ON my GS?

If it were not okay, I would have fried plenty of hardware. I do this all
the time. I have seen no problems with having some devices off. As I have
mentioned, I keep my magneto optical off most of the time; and, my buddy who
uses my 700 now has a flatbed scanner and leaves it off most of the time. Both
work fine.


From: Daniel L. Miller

Apple Scsi & Raid Devices Driver Download 64-bit

Related FAQs Resources: R008SCSITUT.TXT (text)

016- Is there a generic SCSI tutorial available for downloading?

Yes. Bus signals, commands, etc. for the Small Computer Serial Interface
are described in the text resource file R008SCSITUT.TXT .


From: Rubywand

017- What is the correct time-out setting for a Focus hard drive?

Supposedly, the purpose of having the Focus spin down and stop
after 2, 10, or whatever minutes of idleness is to prevent over-heating
and unnecessary wear. After a few days of trying various TO settings, I
set my 'Time Out' to 'Never' and have had no problems with over-heating
or crashes even after many all-day sessions.


From: Harold Hislop, Dan Brown, Rubywand

Related FAQs Resources: R009SCSIMOD.GIF (GIF pic)

018- How do I modify my Apple Computer High-Speed or Rev C SCSI
card to supply Termination Power?

The Termination Power modification for Apple SCSI cards consists of adding
a diode. The mod for each card is shown in resource file R009SCSIMOD.GIF.

The High-Speed card pic shows a simple sketch of the back of the Apple High
Speed SCSI card near connectors 26-33. The directions say that you connect a
1N914 diode between two points:

The anode (non-banded end) of the diode goes to the *top* of L1. The cathode
(banded/striped end) of the diode goes to the >bottom< of RP2

The pic shows the *top* of L1 to be a solder pad (just a solder pad with no trace
showing) a little ways up from a point between connectors 32 and 33.

The >bottom< of RP2 is just a bit up and to the left of the *top* of L1. It is
the lowest of several points (the pic shows 8) arranged in a vertical column
and should have a trace going off to the left.

The other pic shows where to connect the diode on an Apple Rev C SCSI card.


From: Scott G

019- Can I get a Focus drive bigger than a couple hundred MB?

Get a 40MB Focus Hard Card from Alltech. Get an 800MB IDE 2.5' Quantum
GO-drive from Computer Shopper sources for pennies. Replace the original drive
on the Focus Hard Card with the big one (VERY easy and self-explanatory, just
use a screw driver). Low level format, partition, and high level format.
That's it!


From: Gary Black

020- On my ROM-03 GS the hard disk is connected to a CMS SCSI card.
How do I install System 6.0.1?

It turns out that the SCSI drivers that come on the Sys 6.0.1 Install Disk
downloaded from ftp.apple.com are incompatible with CMS ver 3.0 (and probably
earlier) SCSI cards.

What I did was to replace scsi.manager and scsihd.driver in the System
6.0.1 Install disk SYSTEM/DRIVERS folder with scsi.manager, scsihd.driver, AND
CMS.driver from the CMS Utility disk.

With the replacement scsi drivers installed, the Install disk recognizes
the hard drive and installation went smoothly from that point. (The CMS files
are dated 1989 and 1990, so they are a bit older than the 6.01 files, which are
dated 1993. But, they work!)


From: Scott G

021- How is DMA set for SCSI cards with 8MB RAM cards on the GS?

DMA needs to be turned off with the Apple HS SCSI card or the RamFAST
revision C card. It does not need to be turned off with the RamFAST revision D
card (differentiated by being half sized). The latest RamFAST cards are revision D
as are late model CV Tech cards. It is the RamFAST revision D that is designed
to DMA into any RAM card, even 8MB models. It was made around the time of
the CV RAM 8MB model that turned into Sequential's RAM GS Plus, but
functions just as well with the Sirius card.


From: Louis Cornelio

022- My 20MB Focus bombs and there's some goo on the card. A fix?

The goo is leaking from the drive due to a failed seal which seems to
plague some of the older Conner drive modules. The fix is to check with the
seller of the drive for a replacement. At Alltech, a good Apple II person to
contact is Tony Diaz.


From: Joe Walters

023- Where can I find the RamFAST manual on the net?

You can find the RamFAST manual at ...

http://apple2.org.za/gswv/a2zine/Docs/RamFASTManual.txt (Text file)
Ground: /Docs/(.BSQ binscii file)
ftp://apple2.tffenterprises.com/pub/apple2/miscinfo/(.BXY ShrinkIt file)


From: Chuck Newby

Apple SCSI & RAID Devices Driver Download

Apple SCSI & RAID Devices Driver Download

024- How can I tell which Apple SCSI card I have?

The Apple High Speed SCSI card has a set of Dip Switches on it; the Rev C
doesn't, and the ROM chip date is older than 1989, if it shows at all.
The Apple SCSI cards older than REV C don't work in my IIe or IIgs......


From: Supertimer

The Apple High Speed SCSI card has a printed label on one of the chips
showing the name 'Sandwich II' on it.


From: David Empson

The ROMs for the three (non 'High Speed) Apple SCSI card firmware
revisions are ...

341-0112A revision A firmware
341-0112B revision B firmware
341-0437-A revision C firmware

There is only one firwmare revision for the high-speed card

Scsi Scanner Device


From: Patrick Schaefer and Dakin Williams

Apple Scsi Hard Drives

025- Where can I find Profile maintenance and formatting info?

See the ProfileHardDriveMaintenance.txt file on Ground.