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SCSI CD-ROM drive and red desktop!
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 reasonable. 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. |
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#2
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SCSI CD-ROM drive and red desktop!
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 (4+0+1=5). Have they all the same connectors given that there are over a dozen types of SCSI adapter / interface? "Chris Smith" wrote: 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 reasonable. 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. |
#3
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SCSI CD-ROM drive and red desktop!
Thank you for your reply. It sounds complex and should keep me busy this
winter! "BAR" wrote in message ... 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 (4+0+1=5). Have they all the same connectors given that there are over a dozen types of SCSI adapter / interface? "Chris Smith" wrote: 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 reasonable. 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. |
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