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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020313 Description of problem: On a dual PIII, with an Adaptec 29160, kernel 2.4.18-10smp, Adaptec AIC7xxx driver version: 6.2.6, I'm seeing very poor SCSI performance. "cat /proc/scsi/aic7xxx/0" produces (along with other more normal info) "Corrupted Serial EEPROM". I assumed that this indicated the card was bad, but replacing it with a brand new one resulted in the same error message and the same poor performance. The same adapter when placed on another identical box (with earlier versions of the AIC driver) worked as expected, and produced no error message. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.Boot machine normally 2. 3. Actual Results: The error message "Corrupted Serial EEPROM" results when issuing the command "cat /proc/scsi/aic7xxx/0", accompanied by poor SCSI performance. Expected Results: No error message, and normal SCSI performance Additional info: The machine is a dual PIII-1.26, Supermicro MB, 512 M RAM, Adaptec 29160 SCSI controller, multiple Seagate Cheetah 10k LVD drives. On identical hardware running RH 6.2, RH 7.1 and RH 7.2 (with identically configured user software) I'm not seeing the problem; these machines, however, are running version 5.2.4/5.2.0 of the Adaptec driver. A similar single CPU machine running RH 7.3 and version 6.2.5 of the adaptec driver doesn't exhibit the problem. The speed loss (nearly 50% compared to nearly identical systems) is making the machine practically unusable for it's intended application. TIA for any and all advice/suggestions/potential fixes.
One additional datapoint: right before the SCSI card is ID'd during bootup, the following error message appears: SCSI subsystem driver Revision: 1.00 kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2