Same SCSI drive appears multiple times on the controller list

Posted by ohad on Super User See other posts from Super User or by ohad
Published on 2010-01-01T19:19:49Z Indexed on 2010/03/28 18:03 UTC
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Hi,

I have an Adaptec AHA-2940UW SCSI adapter, to which I connected a single Atlas 10K III drive (and nothing more). When my computer loads up, the pre-OS Adaptec screen shows (I believe this is called the POST screen), where I can see the Atlas drive listed many times (i.e. with ID0, ID1, ... ID5, ID7, ID8,...,ID15 [ID6 is the adapter itself])

Using the same HD on an Adaptec AHA-2940UB the disk only shows once

Since my OS hasn't been installed yet, I'm not sure if this is a problem (I would guess it is), and if so - how to solve it.

Termination and multiple LUNs come mind, but the cable provides termination and I don't see why a hard drive would request multiple LUNs, especially considering it is not jumpered at all, and multuple LUN support is disabled in the Adaptec controller BIOS (via the SCSISelect utility)

Thank you

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