SCSI Timeout with Adaptec 2940UW Rev. E (Bios 1.32)

[Chris Bondy]

i wonder what my problem is then ;p 

cause i was getting alot timeouts, and normally i always turn off
disconnect, i've had years of problems with it (since the drive was first
written, and this is linux or freebsd) i added this new drive seagate bar. 
machine was stable before that. I turn ON disconnect for that drive only,
and timeouts have gone away. And i do have two other seagates in there,
same model, and those don't like disconnect. ( also have two ibm 4 gigs,
3 quantum 4 gigs )  OS is linux 1.3.33 standard, i do think i have bios
version 1.25 tho, or maybe thats 3940 uw, i forgot, too many cards.



> > 
> > In the meantime, I found a way to stop the timeouts occure. I just
> > disabled the "Enable Disconnect" on all the ids in the Bios options, as
> > descriebed in a FAQ on the Adaptec Web site. Now I am able to install
> > Linux and to use it.
> 
> Then the newer driver will not help you.  I can reproduce this problem
> here as well, and it appears that the data fifo on the aic7880 gets fauled
> up when the target decides to disconnect with just the right amount of
> data sitting in the fifo.  I'm still working the issue, but no guarantee
> of when I'll have a solution.  This seems to only occur with Rev B. aic7880
> silicon.
> 
> --
> Justin
> 
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