Re: SCSI CD-ROM drive and red desktop!
From: Chris Smith (princesofmaine_at_prexar.com)
Date: 09/11/04
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Date: Sat, 11 Sep 2004 06:47:40 -0400
Thank you for your reply. It sounds complex and should keep me busy this
winter!
"BAR" <BAR@discussions.microsoft.com> wrote in message
news:2C50D530-5226-417D-9469-45A1CD10DEA8@microsoft.com...
> 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.
>>
>>
>>
- Next message: Ron Colvin: "Re: Can a new Mac export to an XP drive?"
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