Re: sata controllers status=0x51 { DriveReady SeekComplete Error } error=0x84 { DriveStatusError BadCRC }

[David Greaves <david@dgreaves.com>]

Party line: It's a faulty cable (on both drives? triggered by rsync?
Doesn't show up under 'badblocks'? hah!)

Check out the linux-ide archive for my (and others) reports.

I've had lots of issues like this - spurious and IMHO incorrect error
messages. Only certain types of disk access cause them - xfs_repair and
rsync seem to tickle it.

With 2.6.15 I had lots of *very* scary moments with multiple disk
failures on a raid5 during xfs_repair.
I think it's down to the 'basic' error handling in the libata code and
certain disks/controllers being loose with the protocol. They then
identified problems in 'fua' (IIRC) handling which was pulled for 2.6.16.

2.6.16 seems to be much better (fewer 'odd' errors reported and md
doesn't mind)

David
PS Mitchell - you're still using Verizon and I still live off the edge
of their known world (in the UK) so I don't expect you'll get this reply
- hard luck my friend - get a better ISP!)


Mitchell Laks wrote:

>Hi,
>
>I have a production server in place at a remote site. 
>I have a single system drive that is an ide drive 
>and two data drives that are on a via SATA controller in a raid1 
>configuration.
>
>I am monitoring the /var/log/messages and I get messages every few days
>
>Mar 22 23:31:36 A1 kernel: ata6: status=0x51 { DriveReady SeekComplete Error }
>Mar 22 23:31:36 A1 kernel: ata6: error=0x84 { DriveStatusError BadCRC }
>
>Mar 23 23:20:12 A1 kernel: ata5: status=0x51 { DriveReady SeekComplete Error }
>Mar 23 23:20:12 A1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
>Mar 23 23:32:03 A1 kernel: ata6: status=0x51 { DriveReady SeekComplete Error }
>Mar 23 23:32:04 A1 kernel: ata6: error=0x84 { DriveStatusError BadCRC }
>
>Mar 24 23:22:45 A1 kernel: ata5: status=0x51 { DriveReady SeekComplete Error }
>Mar 24 23:22:45 A1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
>
>
>Mar 27 23:16:57 A1 kernel: ata5: status=0x51 { DriveReady SeekComplete Error }
>Mar 27 23:16:57 A1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
>
>Mar 28 23:10:16 A1 kernel: ata5: status=0x51 { DriveReady SeekComplete Error }
>Mar 28 23:10:17 A1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
>Mar 28 23:23:32 A1 kernel: ata6: status=0x51 { DriveReady SeekComplete Error }
>Mar 28 23:23:32 A1 kernel: ata6: error=0x84 { DriveStatusError BadCRC }
>
>
>Mar 29 23:33:26 A1 kernel: ata6: status=0x51 { DriveReady SeekComplete Error }
>Mar 29 23:33:26 A1 kernel: ata6: error=0x84 { DriveStatusError BadCRC }
>
>Interestingly by the logs I see that they have occured 
>
>March 1,2,3,8,14,17x3,20x4,21,22,23x2,24,27,28x2,29.
>
>(x2 means two errors as in above example).
>
>Also they occur during the activity of the cron job I do at 11pm to rsync 
>backup the sata drive raid 1 to another server.
>
>here is the output of dmesg:
>
>
>ata5: dev 0 cfg 49:2f00 82:746b 83:7f01 84:4023 85:7469 86:3c01 87:4023 
>88:407f
>ata5: dev 0 ATA, max UDMA/133, 781422768 sectors: lba48
>ata5: dev 0 configured for UDMA/133
>scsi4 : sata_via
>ata6: dev 0 cfg 49:2f00 82:746b 83:7f01 84:4023 85:7469 86:3c01 87:4023 
>88:407f
>ata6: dev 0 ATA, max UDMA/133, 781422768 sectors: lba48
>ata6: dev 0 configured for UDMA/133
>scsi5 : sata_via
>  Vendor: ATA       Model: WDC WD4000YR-01P  Rev: 01.0
>  Type:   Direct-Access                      ANSI SCSI revision: 05
>SCSI device sda: 781422768 512-byte hdwr sectors (400088 MB)
>SCSI device sda: drive cache: write back
>SCSI device sda: 781422768 512-byte hdwr sectors (400088 MB)
>SCSI device sda: drive cache: write back
> /dev/scsi/host4/bus0/target0/lun0: p1
>Attached scsi disk sda at scsi4, channel 0, id 0, lun 0
>  Vendor: ATA       Model: WDC WD4000YR-01P  Rev: 01.0
>  Type:   Direct-Access                      ANSI SCSI revision: 05
>SCSI device sdb: 781422768 512-byte hdwr sectors (400088 MB)
>SCSI device sdb: drive cache: write back
>SCSI device sdb: 781422768 512-byte hdwr sectors (400088 MB)
>SCSI device sdb: drive cache: write back
> /dev/scsi/host5/bus0/target0/lun0: p1
>Attached scsi disk sdb at scsi5, channel 0, id 0, lun 0
>
>
>Am I correct in assuming that the sata drives are giving me these errors, 
>and what shall I do? Could it possibly be a problem with the sata controller 
>rather than the drives?
>
>me@A1:~$ cat /proc/mdstat
>Personalities : [raid1]
>md0 : active raid1 sda1[0] sdb1[1]
>      390708736 blocks [2/2] [UU]
>
>unused devices: <none>
>
>I have done some testing with different sata controllers and recently switched 
>another server from the built in
>sata controller on the A8v (via8237 controller) motherboard to  an add in pci 
>promise sata II150 card.
>
>I think I have seen conflicts between the sata_via and sata_promise and I 
>already have a sata_promise card in the system for future expandability.
>
>I am running the debian stock 2.6.12-1-386 kernel and debian sarge with mdadm 
>ii  mdadm          1.9.0-4sarge1  Manage MD devices aka Linux Software Raid
>
>
>1:/var/log# lsmod|grep sata
>sata_via                8452  2
>sata_promise            9988  0
>libata                 44164  2 sata_via,sata_promise
>scsi_mod              129096  4 sr_mod,sata_promise,libata,sd_mod
>
>Thank you very much.
>
>Mitchell
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