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Boot off 1 GB plus SCSI drive

Posted on 1998-11-25
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Last Modified: 2010-04-27
Is there any way to boot off a 1 GB plus SCSI without losing any harddrive space or getting a new bios?
Using Adaptec AHA-1542B SCSI host adapter.
If only way is changing bios, how much do they usually cost?
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Question by:gordd
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Expert Comment

by:Otta
ID: 1129781
BIOS updates are usually free.
What is displayed when the BIOS starts up?
Use SHIFT-PAUSE to "freeze" the screen,
so that you can use pencil-and-paper to record everything on the screen.
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Expert Comment

by:jhance
ID: 1129782
The Adaptec 1542B has an onboard BIOS and will boot from a SCSI disk drive.  There are three things that must be in place for this to happen, however:

1) There must be a bootable partition built on the SCSI disk.
2) The SCSI BIOS must be enabled on the 1542.
3) There must NOT be a bootable partition on any IDE drive in your system.

If these three are true, then the 1542 will boot the SCSI disk.
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Author Comment

by:gordd
ID: 1129783
cannot get fdisk.exe to detect drive and when partition is made with afdisk.exe from ez-scsi, system does not detect drive.
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Author Comment

by:gordd
ID: 1129784
Adjusted points to 100
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Expert Comment

by:Jason_S
ID: 1129785
gordd:  What other drives do you have in the system?  Does the SCSI BIOS detect the drive during POST?
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Author Comment

by:gordd
ID: 1129786
Booting off 89mb IDE. 2gig SCSI drive partitioned 400/1600mb. Everything works fine in Windows95 and DOS.
Would like it to be able to boot off 400mb partition and get rid of IDE drive.
When target is set for zero, bios does not recognize as boot drive.
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Expert Comment

by:Jason_S
ID: 1129787
To boot to SCSI with IDE devices in the system requires a certain configuration depending on what other IDE devices you have installed.  Please list the other IDE devices, and what they are set as. (Primary/Secondary, Master/Slave)
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Author Comment

by:gordd
ID: 1129788
I have no problem booting off an IDE drive. What I want to know is how to to get the SCSI controller (AHA-1542B) to recognize a two gig harddrive(partitioned into 400 and1600 mb) so that I can boot off the 400 mb partition(if at all possible).
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Expert Comment

by:Jason_S
ID: 1129789
Does the SCSI BIOS detect the drive during POST, and assign it as 80h, 81h, 82h, or 83h?
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Accepted Solution

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jrhelgeson earned 200 total points
ID: 1129790

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