Bug#338089: New aic7xxx driver fails spectacularly on 2940UW
James Bottomley <James.Bottomley@SteelEye.com> wrote:
> My best guess would be that the bus is slightly marginal. The
> aic7xxx drivers are notoriously sensitive to bus problems. Could you
> try lowering the bus speed to 10MHz in the aic7xxx bios and see if
> that helps?
Sure. I changed the device to 20MByte/s max. Now the driver shows
10MHz, 16-bit wide... and DV still fails, with what looks like the same
messages.
As for the bus being marginal, I don't see why it would be, but
anything is possible.
Host adapter termination is set to "Automatic". If I understand things
correctly, since there's no cable attached to the internal 50pin
connector or the external connector, I could try forcing it to "Low ON
/ High ON"... right?
The cabling looks like this:
[HBA] -- [disk] -- [unused connector] -- [terminator]
I'm pretty sure the cable is U160 rated (it wasn't cheap). The
terminator isn't integrated into the cable -- it's a plug-in Active SE
terminator.
The drive is LVD capable, but I've never had trouble running it in SE
mode. The "Force SE" jumper is not installed, but I suppose I could try
that too.
http://www.hitachigst.com/tech/techlib.nsf/products/Ultrastar_36LZX
BTW -- Another oddity I should mention is that if I warm-reboot the
system after DV fails, the drive isn't detected during POST. Power
cycling fixes it. (In other cases, warm-rebooting works fine.)
Let me know what I should try next.
-- graham
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