On Sun, 3 Sep 2000, Ahbaid Gaffoor wrote:
> Hi all,
>
> I'm almost doen building my linux - oracle database server...
>
> Just one question for the SCSI experts.
>
> The board is a supermicro P6DBS with an onboard adaptec SCSI controller.
>
> I have four seagate ST12550N 50 pin SCSI drives, and the board has a 50
> pin interface. I also have a 50 pin SCSI cd-rom and a 50 pin cable that
> can handle seven devices.
>
> Here's the plan:
>
> Let's say the cable is numbered from the motherboard connector to the
> last device on it as 0 through 7.
>
> I plan to put the cd-rom on 1, the four drives on 2 through 5, leaving 6
> and 7 unattached.
>
> Do I need to get a SCSI terminator? If so, do I put it on 6? Or, if the
> drive on 5 can be made to terminate, is that what I should do?
>
> Your advice is all welcome.
>
> thanks,
>
> Ahbaid.
>
With SCSI, both ends of the chain nead to be terminated. What you can
do with the setup you have is to turn on the termination on the drive on
connector #5. The mother board should have termination turned on for
its end, especialy if it only has the one SCSI connector. Just make
sure that only the drive farthest from the motherboard is the only one
that has termination turned on.
Things to keep in mind - each drive needs to be jumpered to a seperate
ID, and the controller is usualy numbered 7. Also, if you are planning
to boot off of a SCSI hard drive, you may be limmited to ID 0 and 1 for
booting. This is a common BIOS limit.
Mikkel
--
Do not meddle in the affairs of dragons,
for you are crunchy and taste good with ketchup.
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