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From Bugzilla Helper: User-Agent: Mozilla/4.73 [en] (Win95; U) Description of problem: Software: RedHat 7.1 clean install Attempting to install 7.1 on departmental server. Several attempts failed when the aic7xxx driver was loaded. I observed system lockups as well as the scrolling scsi bus reset errors. (I did pass the noprobe option at the boot prompt.) Now that 7.1 is installed, I am still observing problems. The machine is incredibly slow and often just hangs for 10-15 seconds. No messages are reported in any of the log files. Sometimes during the 'hang', the disk drive will be lit (steady). Once the light goes off, the system starts to respond. A similar behavior has been noticed with the aic7xxx_mod module. Difference is that log entries are generated. (scsi0: Someone reset channel A scsi0:0:0:0 Attempting to queue an ABORT messaged scsi0:0:0:0 Cmd aborted from QINFIFO aic7xxx_abort returns 8194 scsi0:0:0:0 Attempting to queue a TARGET RESET message scsi0:0:0:0 Command not found aic7xxx_dev_reset returns 8194) This repeats almost continuously...... The machine worked flawlessly under 6.2. How reproducible: Always Steps to Reproduce: 1.Run 7.1 on hardware described below 2. 3. Additional info: Hardware: SuperMicro S2QE6 motherboard with 4 Gigs memory, 1 550MHz Xeon CPU (2MB cache) Motherboard has onboard AIC-7899 Ultra 160/m SCSI Controller 1 ATLAS_V_18_SCA disk drive connected to SCSI interface 1 CDROM connected to IDE interface
>>>> Someone reset channel A This log message is an almost guaranteed indication that you have either cabling, termination, or power problems. The driver is detecting that someone else has reset the SCSI bus. This happens when the voltage on the SCSI_RESET pin drops too low. Bad termination, bad termination power, bad cabling, a disk drive that is going bad, or bad power supply can cause this. I would check your hardware very carefully. In the meantime, I'm closing this as NOTABUG. Reopen the report if I'm wrong about it being hardware.