aic7xxx timeout errors on boot

[Jim Shepherd]

Doug Ledford wrote:
> 
> Try turning down or off the Syncronous negtiation speeds in the Adaptec
> BIOS area and see if that makes a difference on your drive.  Also make
> sure you aren't enabling the PROBE_ALL_LUNS options in the SCSI
> configuration area when building your kernel.
> 
> --
>   Doug Ledford   <dledford at redhat.com>
>    Opinions expressed are my own, but
>       they should be everybody's.

I did not have PROBE_ALL_LUNS enabled when compiling the kernel.  I
tried the following with the 7880util.exe program:

1. Reduce sync down to 20 (lowest setting with ultra enabled)
   <no noticeable effect>
2. Disable sync
   <no noticeable effect>
3. Initiate wide negotiation disabled
   <change in messages as follows (primarily the detection of the cdrom
and the Mode Sense part>

(scsi0:0:0:0) Synchronous at 40.0 Mbyte/sec, offset 8.
  Vendor: QUANTUM   Model: ATLAS IV 9 WLS    Rev: 0808
  Type:   Direct-Access                      ANSI SCSI revision: 03
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
  Vendor: CHINON    Model: CD-ROM CDS-535    Rev: 020
  Type:   CDROM                              ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 4, lun 0
scsi: detected 1 SCSI cdrom 1 SCSI disk total
scsi: aborting command due to timeout: pid 0, scsi0, channel 0, id 4,
lun 0, Mode Sense 00 2a 00 80 00
SCSI host 0 abort (pid 0) timed out - resetting
SCSI bus is being reset for host 0 channel 0
SCSI host 0 channel 0 reset (pid 0) timed out - trying harder
(last 3 lines repeat indefinitely)

4. Enable disconnect turned off
   <no noticeable effect>
5. Disable ultra 
   <no noticeable effect>

(I have seen a few postings from people who noticed that the synchronous
speed is being reported at 20.0 Mbyte/sec instead of 40.0 Mbyte/sec even
though they have an Ultra adapter.  I had the same problem until I used
the 7880util.exe DOS utility (came on the EZ-SCSI disk 2) to enable the
Ultra capability.  It seems that the motherboard manufacturer disabled
Ultra by default.)

Any other ideas?  Any other information I can provide?

Jim Shepherd


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