Re: kernel 3.3.4 damages filesystem (?)

[Hugo Mills <hugo@carfax.org.uk>]

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On Mon, May 07, 2012 at 12:46:00PM +0200, Helmut Hullen wrote:
> Hallo,
> 
> "never change a running system" ...
> 
> For some months I run btrfs unter kernel 3.2.5 and 3.2.9, without  
> problems.
> 
> Yesterday I compiled kernel 3.3.4, and this morning I started the  
> machine with this kernel. There may be some ugly problems.
> 
> Copying something into the btrfs "directory" worked well for some files,  
> and then I got error messages (I've not copied them, something with "IO  
> error" under Samba).
> 
> Rebooting the machine with kernel 3.2.9 worked, copying 1 file worked,  
> but copying more than this file didn't work. And I can't delete this  
> file.
> 
> That doesn't please me - copying more than 4 TBytes wastes time and  
> money.
> 
> =========== configuration =================
> 
> /dev/sdc1 on /srv/MM type btrfs (rw,noatime)
> 
> /dev/sdc: SAMSUNG HD204UI: 25 °C
> /dev/sdf: WDC WD30EZRX-00MMMB0: 30 °C
> /dev/sdi: WDC WD30EZRX-00MMMB0: 29 °C
> 
> Data, RAID0: total=5.29TB, used=4.29TB
> System, RAID1: total=8.00MB, used=352.00KB
> System: total=4.00MB, used=0.00
> Metadata, RAID1: total=149.00GB, used=5.00GB
> 
> Label: 'MMedia'  uuid: 9adfdc84-0fbe-431b-bcb1-cabb6a915e91
> 	Total devices 3 FS bytes used 4.29TB
> 	devid    3 size 2.73TB used 1.98TB path /dev/sdi1
> 	devid    2 size 2.73TB used 1.94TB path /dev/sdf1
> 	devid    1 size 1.82TB used 1.63TB path /dev/sdc1
> 
> Btrfs Btrfs v0.19
> 
> =================== boot messages, kernel related ==============
> 
> [boot with kernel 3.3.4]
> May  7 06:55:26 Arktur kernel: ata5: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
> May  7 06:55:26 Arktur kernel: ata5: SError: { PHYRdyChg }
> May  7 06:55:26 Arktur kernel: ata5: hard resetting link
> May  7 06:55:31 Arktur kernel: ata5: COMRESET failed (errno=-19)
> May  7 06:55:31 Arktur kernel: ata5: reset failed (errno=-19), retrying in 6 secs
> May  7 06:55:36 Arktur kernel: ata5: hard resetting link
> May  7 06:55:38 Arktur kernel: ata5: COMRESET failed (errno=-19)
> May  7 06:55:38 Arktur kernel: ata5: reset failed (errno=-19), retrying in 9 secs
> May  7 06:55:46 Arktur kernel: ata5: hard resetting link
> May  7 06:55:47 Arktur kernel: ata5: COMRESET failed (errno=-19)
> May  7 06:55:47 Arktur kernel: ata5: reset failed (errno=-19), retrying in 34 secs
> May  7 06:56:21 Arktur kernel: ata5: hard resetting link
> May  7 06:56:22 Arktur kernel: ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
> May  7 06:56:22 Arktur kernel: ata5.00: configured for UDMA/100
> May  7 06:56:22 Arktur kernel: ata5: EH complete
> May  7 07:12:07 Arktur kernel: ata5.00: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
> May  7 07:12:07 Arktur kernel: ata5: SError: { PHYRdyChg }
> May  7 07:12:07 Arktur kernel: ata5.00: failed command: WRITE DMA EXT
> May  7 07:12:07 Arktur kernel: ata5.00: cmd 35/00:00:00:62:50/00:04:5e:00:00/e0 tag 0 dma 524288 out
> May  7 07:12:07 Arktur kernel:          res d8/d8:d8:d8:d8:d8/d8:d8:d8:d8:d8/d8 Emask 0x12 (ATA bus error)
> May  7 07:12:07 Arktur kernel: ata5.00: status: { Busy }
> May  7 07:12:07 Arktur kernel: ata5.00: error: { ICRC UNC IDNF }

   This is a hardware error. You have a device that's either dead or
dying. (Given the number of errors, probably already dead).

> May  7 07:12:07 Arktur kernel: ata5: hard resetting link
> ==========================================================
> 
> The 3 btrfs disks are connected via a SiI 3114 SATA-PCI-Controller.
> Only 1 of the 3 disks seems to be damaged.
> 
> ==========================================================
> 
> Ca I repair the system? Or have I to copy it to a set of other disks?

   If you have RAID-1 or RAID-10 on both data and netadata, then you
_should_ in theory just be able to remove the dead disk (physically),
then btrfs dev add a new one, btrfs dev del missing, and balance.

   Hugo.

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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