4 EIDE and SCSI in a single box issues (You cannot boot from the SCSI Drive!)
A. Should the SCSI controller's BIOS be enabled or disabled?
B. Does the SCSI ID have to be 2 or greater?
C. What kind of drivers might be required for the SCSI drive?
D. How does the SCSI drive get a drive letter assigned?
E. Can more than one SCSI drive be used?
F. Does the number of installed EIDE drives matter?
5 Windows 95 Problems with SCSI?
5.1 My Zip Drive is recognised by the SCSI
controller and Windows 95 but when I try to access it the machine stops.
5.2 My CD Rom drive is not recognised even after I installed
the ASPI Drivers that came with my card!
5.3 My CD-Rom Drive is SCAM compliant but
doesn't work until I manually allocate it an ID???
5.4 Machine locks up when accessing the
CD after a while!
5.5 How do I make a boot disk for my
SCSI cd rom Drive???
5.6 Changing the CD-Rom drive letter in Win95? Revisited! Jaz
& Zip Problems!!! 
5.7 Nothing but hassles with Jaz
or Zip Tools!
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Mostly because my new Beast of a machine uses SCSI that and I figured that SCSI bring up a whole new host of interestin Scenearios that Windows 95 users may not be aware of. Besides, SCSI is great! **HK 22/7/97
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SCSI or Small Computer Systems Interface is an alternative I/O system which allow you to connect 7-15 devices to a single SCSI chain. There are several main SCSI types:-
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A SCSI Bus must be terminated - This means that both internally and externally the SCSI bus must be 'sealed' with a terminator. Incorrect termination can cause the machine to:-
i) Lock up ii) Lose data iii) Or cause nasty intermittent crashes which are almost as inexplicable as faulty Ram.
** You may however sometimes be lucky and have it work OK for you??? SCSI is an Art not a Science.
The length of cable both internal and external should not exceed 3 Metres With standard SCSI you may get away with more but Fast Wide controllers are far less forgiving. The manual that came with my Adaptec 2940 UW states that cable length should not exeed 3 Metres, I found 3 Metres to be the absolute Max!!!!!
Each device must have a Unique 1-7 SCSI ID number. If any of the numbers conflict either/or both conflicting devices may not work or alternatively the whole machine ceases to function. The devices include the SCSI host adaptor which also has its own ID.
The SCAM protocol stands for SCSI Configured Auto Matically. SCAM allows the host adapter BIOS and/or the driver software to assign SCSI ID numbers to devices on the SCSI bus automatically.
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4 EIDE & SCSI in single box issues.
HELP! I need to install a SCSI and IDE Drive in same box.
Issues : -
1) You cannot boot from the SCSI Drive. Your partition will be in the following order: Primary on Each Physical IDE Drive, Primary on Each SCSI HD, Extended on each IDE, Extended on each SCSI.
2) SCSI ID can be set to 0 or 1, and is only necessary if you are booting from the SCSI Drive, as stated previously, if you have an IDE Drive, your system will boot from the IDE Drive.
Assuming the EIDE drive is the boot drive:
A. Should the SCSI controller's BIOS be enabled or disabled?
Disabled
B. Does the SCSI ID have to be 2 or greater?
Doesn't matter. MUST be 0 or 1 when the SCSI is controlling, but otherwise don't worry about it; keeping it 0 or 1 should avoid conflicts with other devices which are virtually NEVER assigned 0 or 1
C. What kind of drivers might be required for the SCSI drive?
Under Win'95, none -- most common SCSI adapter cards will be identified just fine by hardware setup; and the devices chained off of it should also be "found", so long as they're pretty much "plain vanilla"; and since you're not talking about BOOTING to the SCSI, then it's not so much of an issue to have REAL mode drivers loaded; you might want them if your CDROM is also SCSI-based -- that way you'll be able to access the CDROM from a command-line boot (like if you want to do a reinstall of Win'95 onto a "clean" HD from a floppy) -- in that case, you'll need lines like:
CONFIG.SYS
device=aspi8dos.sys /d
device=aspicd.sys /d:aspicd0
AUTOEXEC.BAT
mscdex.exe /d:aspicd0 /L:n /M:12 /s
D. How does the SCSI drive get a drive letter assigned?
Booting from (E)IDE will give C: (up to F:, depending on how many drives are hanging off that controller), and SCSI picks up afterwards -- ie. if you have TWO (E)IDE drives, they will become C: and D: and then your SCSI letters start at E: -- if you then ADD a drive to (E)IDE, this will force the SCSI letters to start at F:
E. Can more than one SCSI drive be used?
Sure can (isn't that why you bought SCSI?) -- think that there can be 6 SCSI HD's (or devices), so long as there's no other SCSI device attached to that card (one of the seven numbers is obviously reserved for the SCSI adapter card itself)
F. Does the number of installed EIDE drives matter?
No! You can have up to 4 EIDE devices (up from the only two from IDE) -- there can be two hardddrives off the primary channel and two off the secondary (each channel will have a master and slave for THAT channel) -- while not as extensive a selection as with SCSI, there can be other devices besides HDs off of EIDE (not IDE, however) -- think there is some limitation of mix&match of what type of device can be on each channel (that might be changing -- it used to be that people avoided putting a HD on the same channel as a CDROM drive, since it slowed the HD down considerably)
kamhiv@
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The Cable is either faulty of too long! Some devices are more tolerant than others - The Zip Drive is fairly tolerant, my Umax Scanner is far less forgiving with the same cable.
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Troubleshoot!!! Get that damned thing working in DOS! Works??? OK the Hardware is OK! Then worry about Windows 95!
Does the CD-Rom Support SCSI parity??? If not then it will not work in Windows 95!
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Have you activated this feature on your SCSI card??? Usually on a jumper or the SCSI bios as in the Adaptec 2940UW???
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Turn of you external motherboard cache is it an Acer board? Soln:- If it works set the device to SCSI & turn on cache.... Live with it or return it to you supplier. NEC 6i internal (older pre SCAM models) & Adaptec 2940
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5.5 How do I make a boot disk for my SCSI CD-Rom Drive???
Date: Sun, 20 Oct 1998 14:42:08 +0100 From: Thomas Görlitzer <[email protected]> Subject: Re: INSTALL: Upgrade from SCSI CD to SCSI Disk ??
You have to install your DOS SCSI drivers to access a SCSI CD-ROM under Dos.
1. Make an ordinary DOS boot disk.
2. Copy your DOS SCSI drivers on it ( can be found on your SCSI driver disk)
3. At config.sys insert your drivers (at my Adaptec SCSI this two drivers/lines are necessary) "DEVICE=C:\SCSI\ASPI8DOS.SYS /D" "DEVICE=C:\SCSI\ASPICD.SYS /D:ASPICD0" (without ")
4. At autoexec.bat insert your MSCDEX start command e.g. "C:\SCSI\MSCDEX.EXE /D:ASPICD0 /L:E"
/L:E specifies E as your CD-ROM drive letter. /D:xxxx (here /D:ASPICD0) can be chosen freely but it MUST be the same as at config.sys /D:xxxx
5. Boot from this disk now and your CD-ROM should be there.
If there is a utility on your SCSI driver disk to make a DOS startup disk use it instead of editing config.sys and autoexec.bat.
And please keep in mind Windows 95 Setup program will always complain about your OS/2 partition - at least it is so at on my computer. So install Windows 95 first on your computer and AFTER that OS/2.
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Date: Sun, 19 Nov 1998 07:18:58 -0500 From: Hans Klarenbeek <[email protected]> Subject: Changing the CD-Rom Drive letter nice but who the F**K cares?
Valid point Reg. Until you people out there experience the joys of SCSI... When you add a SCSI device you CD being according to Dos/Windows 95 the CD-Rom drive is the last in food chain means that all the apps which used to run from CD don't anymore, SHIT! (Sometimes a Mac is ahead of the PC - though not often trust me!) Or as one person mentioned on the List.
Tony wrote:- As for the drive letters, before installation, CD was G: When jazz was installed, it went to H: and jazz took G: Since ALL my cd shortcuts are set to G: for the cd, what I want is to go back to G: for the cd. I tried your suggestion but this will only make the cd drive letter greater. What next?
Date: Sun, 19 Nov 1998 07:18:58 -0500 From: Hans Klarenbeek <[email protected]> Subject: Changing the CD-Rom Drive Letter.
Yes unfortunately this works best as preventative measure, so you set your CD-Rom Drive High and leave a few device letter space so you after say C: goto H: leaving you D: E: F: G: to play with change it (the CD) to a high up device letter and then reinstall sorry friend - some apps will allow you hack it manually - please note that DOS (true Dos) is unaffected by these setting you will have to hack these manually as in 5.5. Further comments of interest follow.
Date: Sat, 9 Nov 1998 22:22:57 -0800 From: "Eduard L. Frerking" <[email protected]> Subject: Re: HARDWARE - Jazz drive problems
Concerning this jazz drive / cd drive naming scene.
Win95 will name all hard drives it finds firts (jazz included) then it will name the cd drives, then the floppies. It starts at C then moves up the alphabet until it goes for the floppies which starts with A, then B, then whatever is left over.
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5.7 Nothing but hassles with Jaz or Zip Tools!
Date: Sat, 9 Nov 1998 22:22:57 -0800 From: Donn Barber <[email protected]> Subject: Re: HARDWARE - Jazz drive problems
As for the problem when using the Jaz Tools, you have MSIE 3.0 on your machine don't you? There is a known incompatibility between one of the .dll's for MSIE and the Jaz Tools (sorry, I don't remember which one it is, but I beleive it is the one that hilites the full name even if there isn't room in the box in Explorer). I don't know if there is a fix, or if one is planned. The original work around was not to use those tabs. If you have any further questions or comments, feel free to e-mail me.