Messages in this thread | | | Date | Mon, 21 Sep 2009 21:01:34 -0700 | Subject | libATA SATA errors on DVD bad sectors... | From | Maciej Żenczykowski <> |
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I'm getting the following on bad sectors on a pretty badly scratched DVD:
Sep 21 20:23:20 zeus kernel: ata12.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 Sep 21 20:23:20 zeus kernel: ata12.00: port_status 0x20280000 Sep 21 20:23:20 zeus kernel: ata12.00: cmd a0/01:00:00:00:08/00:00:00:00:00/a0 tag 0 dma 2048 in Sep 21 20:23:20 zeus kernel: cdb a8 00 00 16 02 6c 00 00 00 01 00 00 00 00 00 00 Sep 21 20:23:20 zeus kernel: res 51/30:03:00:00:00/00:00:00:00:00/e0 Emask 0x2 (HSM violation) Sep 21 20:23:20 zeus kernel: ata12.00: status: { DRDY ERR } Sep 21 20:23:20 zeus kernel: ata12: hard resetting link Sep 21 20:23:21 zeus kernel: ata12: SATA link up 1.5 Gbps (SStatus 113 SControl 300) Sep 21 20:23:21 zeus kernel: ata12.00: configured for UDMA/100 Sep 21 20:23:21 zeus kernel: ata12: EH complete
Sep 21 20:23:24 zeus kernel: ata12.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 Sep 21 20:23:24 zeus kernel: ata12.00: port_status 0x20280000 Sep 21 20:23:24 zeus kernel: ata12.00: cmd a0/01:00:00:00:08/00:00:00:00:00/a0 tag 0 dma 2048 in Sep 21 20:23:24 zeus kernel: cdb a8 00 00 16 02 6d 00 00 00 01 00 00 00 00 00 00 Sep 21 20:23:24 zeus kernel: res 51/30:03:00:00:00/00:00:00:00:00/e0 Emask 0x2 (HSM violation) Sep 21 20:23:24 zeus kernel: ata12.00: status: { DRDY ERR } Sep 21 20:23:24 zeus kernel: ata12: hard resetting link Sep 21 20:23:24 zeus kernel: ata12: SATA link up 1.5 Gbps (SStatus 113 SControl 300) Sep 21 20:23:25 zeus kernel: ata12.00: configured for UDMA/100 Sep 21 20:23:25 zeus kernel: ata12: EH complete
The command being run is: sg_dd blk_sgio=1 bpt=1 bs=2048 cdbsz=12 coe=0 coe_limit=0 if=/dev/srX odir of=badsector.bin count=1 skip=$i
on a Fedora 11 box: Linux zeus 2.6.30.5-43.fc11.x86_64 #1 SMP Thu Aug 27 21:39:52 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
These only seem to show up when the DVD is inserted into /dev/sr1. /dev/sr0 doesn't seem to spew this crap (although both drives fail to read the sector).
/sys/block/sr0 -> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sr0 /sys/block/sr1 -> ../devices/pci0000:00/0000:00:1e.0/0000:03:09.0/host11/target11:0:0/11:0:0:0/block/sr1
ata1.00: HL-DT-ST BD-RE GGW-H20L YL05 UDMA/133 ata12.00: LITE-ON DVDRW LH-20A1L BL06 UDMA/100
# lspci [-n] | egrep '1e.0|1f.2|3:09' 00:1f.2 0106: 8086:2922 SATA controller: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA AHCI Controller (rev 02) 00:1e.0 0604: 8086:244e PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) 03:09.0 0180: 105a:3d17 Mass storage controller: Promise Technology, Inc. PDC40718 (SATA 300 TX4) (rev 02)
ie. the Lite-On drive on the promise TX4 controller has issues, while the LG on the intel AHCI controller seems fine...
Would it make sense to add this somewhere into the code as a 'bad sector' error condition and not perform a hard reset?
It may be worth pointing out that the LiteOn drive is significantly faster in dealing with the bad sectors, and actually successfully reads a far larger number of them (about 15% of the sectors that the LG can't read, the Lite-On can, and in about 2/3 of the time). I would guess that if it didn't have to hard reset the bus, it'd be even faster...
- Maciej
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