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SCSI Drive problem

B

budec

Gawd
Joined
Jul 10, 2002
Messages
748
The setup:

Adptec (2696?) SCSI controller.

3 Matrox SCSI drives (all same model, brand).

SCSI ID 7 is the adapter "terminator"

ID 1 is drive 1
ID 2 is drive 2
ID 4 is drive 3

All the jumpers are the same on the drives, and they work "correctly" (can acess them in Windows)... but on boot up in the SCSI Card BIOS it has:

ID 1 : Sync: 160
ID 2: Sync: 160
ID 4: Sync: 80

When in windows, if I copy/delete a lot of stuff from the ID 4 drive windows will 'hang' (freeze) for 3-15 seconds, then resume.

Any of the other drives I can copy gigs and gigs of stuff without a freeze, but if I copy over 40 megs to the ID 4 drive it will freeze the system.

All the jumpers are the same (expect for the id jumps), they are all on the same cable (so it's not a cable problem)... they all have the same settings in the BIOS and also in Windows....

any ideas on what would cause this?
 
Check the settings in your SCSI bios and make sure they're the same for all the drives.
If not, set ID4 so it's the same as the other two.
It could also be cabling. Try a different plug on ID4.
I'd also run Maxtor's disk test software on ID4.
 
...are you mising a terminator after the drives? You need one on both ends. The card has one built-in defaulted to enable, and you put the fat black one after all the drives.
 
Does LVD need a termintor? I read that a terminator would mess them up. If needs one, anyone know where I could get one at?
 
if you can find another jumper try changing it to id3. i dunno if it'll help but I had a 5-disk raid5 array (before you drool these were 4-gig disks) and 2 drives weren't working. I changed an id, and then only 1 didn't work. this system didn't need a terminator. dunno about lvd.
 
budec said:
Does LVD need a termintor? I read that a terminator would mess them up. If needs one, anyone know where I could get one at?
Click to expand...
Yes.

The golden rule of SCSI: You absolutely need exactly two terminators per SCSI bus. One on each end.

(and trust me, many people don't know this, we even get people who design storage systems as a profession that try to get away with not using a terminator - always with very bad results.)

Thos goes for SE and LVD SCSI buses.

Heh, I honestly don't know where you can buy them at... I just take them out of our Giant Bucket of Terminators here at work :)
 
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