SCSI CD-ROM drive and red desktop!


Chris Smith

I have a PC workstation that has two SCSI hard drives(IBM) a SCSI
CD-ROM(Plextor UltraPlex 40MAX, An IDE PlexWriter 16/10 40A CD burner and a
Liteon DVD-R.
At boot all of the drives are seen but booting hangs up at the start-up of
the SCSI CD-ROM drive!
Opening and closing the CD tray of the SCSI CD-Rom will trigger continued
boot-up of the system.

When checking the SCSI CD-ROM drive in Device Manager and running the
troubleshooter the monitor screen turns red!

The SCSI BIOS sees all the SCSI drives and the LUN for each seems

This workstation and the SCSI board and devices worked perfectly under XP
Pro Sp1 and has been screwed up since applying Windows XP SP2!

Any help with this miserable problem would be much appreciated.

My thanks to the brave soul who can give me the answer to this mess. And
yes, I would like to keep the same hardware if possible.

Thank you.

Chris Smith.




Have you set your SCSI IDs correctly, without conflicts?
Every device in the chain must have a unique ID assigned so the host adapter
will know with who it's communicating.

(When using Logical Unit Numbers (LUNs) a single SCSI ID can support
multiple devices, this is often used in hardware-raid arrays.)The lowest ID
is 0 (often preset on host adapter to be used for bootable hard disk drive.)
and the highest is 7 or 15.

The host adapter often is preset to ID 7.

The higher the SCSI ID , the higher the priority when negotiating for the
SCSI bus. 7 is highest for all SCSI types, priority sequence for wide SCSI
is: 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8.

On older devices SCSI IDs are configured by setting jumpers or switches on
the device. This is a fairly simple process:
For example, if you have 3 jumpers to configure the ID and you want the
device to use ID 4 you will need to think in 'bits'.
3 jumpers (bits) allow for a maximum value of 7:
(jumpers) on on on = (bits) 1 1 1 = (ID) 4+2+1 = 7
If you would set the first and third jumper only, the ID 5 will be used

Have they all the same connectors given that there are over a dozen types of
SCSI adapter / interface?



Chris Smith

Thank you for your reply. It sounds complex and should keep me busy this

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