Re: FC5 S/W Raid Rebuilding to Infiinity(and beyond!)

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On Mon, 2006-11-20 at 07:56 -0800, Sean Bruno wrote:
> I had a disk failure recently and replaced the drive.  After
> partitioning and such I added my new drive into my Raid 1 and waited for
> the rebuild to complete.
> 
> It's been running for about 36 hours trying to rebuild a ~140GB Raid 1,
> which seems a bit long to me.  
> 
> What's even stranger, is a reboot causes the new disk to be complete
> removed from the Raid 1 set.  And I have to rebuild all of my
> partitions, not just the ~140GB.
> 
> Here is 'cat /proc/mdstat' as it currently sits:
> 
> ----
> [sean@home-desk ~]$ cat /proc/mdstat
> Personalities : [raid1]
> md0 : active raid1 sdb1[0] sda1[1]
>       1052160 blocks [2/2] [UU]
> 
> md1 : active raid1 sdb2[0] sda2[1]
>       4192896 blocks [2/2] [UU]
> 
> md2 : active raid1 sdb3[2] sda3[1]
>       151043008 blocks [2/1] [_U]
>       [==>..................]  recovery = 10.5% (15941760/151043008)
> finish=52.3min speed=42986K/sec
> 
> unused devices: <none>
> ----
> 
> Where md0 is /boot, md1 is swap and md2 is /  
> 
> sdb is the new disk, sda is the running disk.  If I reboot the machine
> sdb disappears completely.
> 
> Any ideas out there?
> 
> Sean
> 
> 
> 

I guess that this is being caused by a 'real' failure on /dev/sda:

Nov 20 15:58:39 home-desk kernel: RAID1 conf printout:
Nov 20 15:58:39 home-desk kernel:  --- wd:1 rd:2
Nov 20 15:58:39 home-desk kernel:  disk 0, wo:1, o:1, dev:sdb3
Nov 20 15:58:39 home-desk kernel:  disk 1, wo:0, o:1, dev:sda3
Nov 20 15:58:39 home-desk kernel: RAID1 conf printout:
Nov 20 15:58:39 home-desk kernel:  --- wd:1 rd:2
Nov 20 15:58:39 home-desk kernel:  disk 1, wo:0, o:1, dev:sda3
Nov 20 15:58:39 home-desk kernel: RAID1 conf printout:
Nov 20 15:58:39 home-desk kernel:  --- wd:1 rd:2
Nov 20 15:58:39 home-desk kernel:  disk 0, wo:1, o:1, dev:sdb3
Nov 20 15:58:39 home-desk kernel:  disk 1, wo:0, o:1, dev:sda3
Nov 20 15:58:39 home-desk kernel: md: syncing RAID array md2
Nov 20 15:58:39 home-desk kernel: md: minimum _guaranteed_
reconstruction speed: 1000 KB/sec/disc.
Nov 20 15:58:39 home-desk kernel: md: using maximum available idle IO
bandwidth (but not more than 200000 KB/sec) for reconstruction.
Nov 20 15:58:39 home-desk kernel: md: using 128k window, over a total of
151043008 blocks.

Nov 20 16:58:01 home-desk kernel: ata1.00: exception Emask 0x0 SAct 0x0
SErr 0x0 action 0x0
Nov 20 16:58:01 home-desk kernel: ata1.00: (BMDMA stat 0x0)
Nov 20 16:58:01 home-desk kernel: ata1.00: tag 0 cmd 0x25 Emask 0x9 stat
0x51 err 0x40 (media error)
Nov 20 16:58:01 home-desk kernel: ata1: EH complete
Nov 20 16:58:02 home-desk kernel: ata1.00: exception Emask 0x0 SAct 0x0
SErr 0x0 action 0x0
Nov 20 16:58:02 home-desk kernel: ata1.00: (BMDMA stat 0x0)
Nov 20 16:58:02 home-desk kernel: ata1.00: tag 0 cmd 0x25 Emask 0x9 stat
0x51 err 0x40 (media error)
Nov 20 16:58:02 home-desk kernel: ata1: EH complete
Nov 20 16:58:03 home-desk kernel: ata1.00: exception Emask 0x0 SAct 0x0
SErr 0x0 action 0x0
Nov 20 16:58:03 home-desk kernel: ata1.00: (BMDMA stat 0x0)
Nov 20 16:58:03 home-desk kernel: ata1.00: tag 0 cmd 0x25 Emask 0x9 stat
0x51 err 0x40 (media error)
Nov 20 16:58:03 home-desk kernel: ata1: EH complete
Nov 20 16:58:04 home-desk kernel: ata1.00: exception Emask 0x0 SAct 0x0
SErr 0x0 action 0x0
...
Nov 20 16:59:01 home-desk kernel: sd 0:0:0:0: SCSI error: return code =
0x08000002
Nov 20 16:59:01 home-desk kernel: sda: Current: sense key: Medium Error
Nov 20 16:59:01 home-desk kernel:     Additional sense: Unrecovered read
error - auto reallocate failed
Nov 20 16:59:01 home-desk kernel: end_request: I/O error, dev sda,
sector 307380301
Nov 20 16:59:01 home-desk kernel: ata1: EH complete
Nov 20 16:59:01 home-desk kernel: ata1.00: exception Emask 0x0 SAct 0x0
SErr 0x0 action 0x0
Nov 20 16:59:01 home-desk kernel: ata1.00: (BMDMA stat 0x0)
Nov 20 16:59:01 home-desk kernel: ata1.00: tag 0 cmd 0x25 Emask 0x9 stat
0x51 err 0x40 (media error)
Nov 20 16:59:01 home-desk kernel: ata1: EH complete
Nov 20 16:59:01 home-desk kernel: SCSI device sda: 312581808 512-byte
hdwr sectors (160042 MB)
...

This repeats over-and-over-and-over throughout my logs.  How can I get
it to rebuild once and then stop? 

Sean


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