Red Hat Bugzilla – Bug 115351
aic79xx.o crashes in Ultra320 mode.
Last modified: 2015-01-04 17:04:33 EST
Description of problem:
Adaptec 29320 in a dual Opteron box, with a pair of 36GB Ultra320
aic79xx.o consistently crashes at system boot time if I allow it to
Forcing the aic79xx.o to downshift to 160MB/s, via the card's BIOS (by
disabling packetization and QAS) allows the card to operate normally.
Both SMP and UP kernels crash.
Boot logs follow.
Created attachment 97577 [details]
System boot crash in aic79xx.o
This is the default setting of the 29320 adapter, which autonegotiates 320MB/s.
Created attachment 97578 [details]
Forcing the 29320 down to 160MB/s succesfully boots the system.
If I go into the 29320's BIOS setup, and manually turn off packetization and
QAS settings for both SCSI disk drives, the card ramps down to 160MB/s, and the
system boots normally.
I am not able to duplicate this on a Athlon64 system using the 29320.
Asus K8V Delux mainboard. Adaptec card negotiates to full 320 speed.
Will continue to test on other amd64 platforms.
fc1 - eol