October 08, 2003

DNS/Apache aliases

Due to the bad hard drive on ntv, I changed the DNS entries for ntv and monitor to point to quark. I then created a VirtualHost entry in quark's httpd.conf to redirect requests for those hostnames to ~cricket/current/grapher.cgi.

Posted by skylar at 03:55 PM | Comments (59)

September 26, 2003

Performance problems

Our performance problems can probably be traced back to a bad disk.

I noticed that the hdparm benchmarks I was running were taking far longer than they were supposed. After having hdparm terminate in a core dump, I used dmesg to look at the kernel ring logs, and noticed these:

hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112384
end_request: I/O error, dev 03:00 (hda), sector 112384
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112386
end_request: I/O error, dev 03:00 (hda), sector 112386
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112388
end_request: I/O error, dev 03:00 (hda), sector 112388
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112390
end_request: I/O error, dev 03:00 (hda), sector 112390
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112392
end_request: I/O error, dev 03:00 (hda), sector 112392
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112394
end_request: I/O error, dev 03:00 (hda), sector 112394
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112396
end_request: I/O error, dev 03:00 (hda), sector 112396
hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=112398, sector=112398
end_request: I/O error, dev 03:00 (hda), sector 112398

I'd say replacing the disk is in order.

Posted by skylar at 08:38 PM | Comments (51)