On Thu, 1 Feb 2007 15:34:29 -0800 bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=7919 > > Summary: Tape dies if wrong block size used > Kernel Version: 2.6.20-rc5 > Status: NEW > Severity: normal > Owner: scsi_drivers-other@xxxxxxxxxxxxxxxxxxxx > Submitter: dmartin@xxxxxxxxxxxx > > > Most recent kernel where this bug did *NOT* occur: 2.6.17.14 > > Other Kernels Tested and Results: > > OK 2.6.15.7 > OK 2.6.16.37 > OK 2.6.17.14 > BAD 2.6.18.6 > BAD 2.6.18-1.2869.fc6 > BAD 2.6.19.2 + > BAD 2.6.20-rc5 > > NOTE: 2.6.18-1.2869.fc6 is a Fedora modified kernel, all others are from kernel.org > > Distribution: Fedora > Hardware Environment: i386 > Arch I386 > Model Dell Poweredge 1300 > Processor Pentium III (Coppermine) 697.929 Mhz. > SCSI Adaptec AHA-2940U/UW/D / AIC-7881U > Disks 3 QUANTUM ATLAS V 9 WLS in RAID 5 software raid attached to adaptech > card above > Tape HP C1537A attached to adaptech card above > > Software Environment: tar and mt > > Problem Description: > > I usually specify a tape block size, such as 'mt setblk 4096'. If I access the > tape drive with the wrong tape block size, for instance 'tar -cvf /dev/tape > foo', the screen fills with kernel errors. If I use the correct block size, as > in 'tar -b 8 -cvf /dev/tape foo', it works fine. If I use the wrong block size I > have to reboot to make the tape drive respond again. > > I've seen this problem on three systems with identical SCSI cards and different > tape drives, so that makes me think it's the AIC7XXX driver. I've tested with > several kernels to try and isolate when this problem was introduced. More > details below. > > Interestingly, my main testing system is running software raid from the same > scsi card with no problems, so this seems specific to tape drives. The other > machine I've seen this on had a separate raid card, so you can't blame it on my > software raid setup. > > Steps to reproduce: > Get a Adaptec AHA-2940U/UW/D / AIC-7881U card and a tape drive, > install a recent kernel > set the tape block size - mt setblk 4096 > read from or write to tape using wrong block size - tar -b 7 -cvf /dev/tape foo > > ------- You are receiving this mail because: ------- > You are on the CC list for the bug, or are watching someone who is. - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
