Hi Len
And .. is it possible to upgrade the superblock ? (I fear the mdadm raid was
created a couple of years back (in a Lenny installation))
Den 14/11/2012 kl. 19.35 skrev Lennart Sorensen:
> On Wed, Nov 14, 2012 at 07:21:36PM +0100, Niels S. Eliasen wrote:
>> I do have a problem that I hope someone can help me with....
>>
>> My old PC(Celeron chip) gave up just the other day.. and I have been
>> struggling ever since to get the the mdadm (raid 1) mounted on my Debian
>> linux...(both systems were/are Squeeze)
>> It appears that whatever I do I get the following:
>>
>> [1218442.677440] sd 1:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00
>> TB/1.81 TiB)
>> [1218442.678301] sd 1:0:0:0: [sda] Write Protect is off
>> [1218442.678316] sd 1:0:0:0: [sda] Mode Sense: 28 00 00 00
>> [1218442.678324] sd 1:0:0:0: [sda] Assuming drive cache: write through
>> [1218442.680682] sd 1:0:0:0: [sda] Assuming drive cache: write through
>> [1218442.680700] sda: sda1
>> [1218442.700032] sd 1:0:0:0: [sda] Assuming drive cache: write through
>> [1218442.700048] sd 1:0:0:0: [sda] Attached SCSI disk
>> [1218444.214595] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.214682] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.219512] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.219525] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.219959] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.219968] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.220446] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.220455] mdadm: sending ioctl 20001261 to a partition!
>> [1218444.220868] mdadm: sending ioctl 400c0910 to a partition!
>> [1218444.220878] mdadm: sending ioctl 400c0910 to a partition!
>> [1218600.624201] __ratelimit: 2 callbacks suppressed
>> [1218600.624214] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.624223] mdadm: sending ioctl partition!
>> [1218600.626213] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.626227] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.626856] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.626866] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.627263] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.627272] mdadm: sending ioctl 20001261 to a partition!
>> [1218600.627796] mdadm: sending ioctl 400c0910 to a partition!
>> [1218600.627806] mdadm: sending ioctl 400c0910 to a partition!
>> [1218853.375782] XFS: bad magic number
>> [1218853.375796] XFS: SB validate failed
>> [1218860.125688] XFS: bad magic number
>> [1218860.125703] XFS: SB validate failed
>>
>>
>> i have tried the "mdadm --scan --assemble" .. and a lot of othe "mdadm"
>> commands.. but so far no luck!
>> is the "mdadm" raid from a PC not useable on a PowerPC ??
>
> If your md raid is version 0.9 superblock, then the content is endianess
> specific.
>
> If it is 1.x, then it should work, unless you have a version of mdadm
> with a bug (which has been the case in the past).
>
> For example:
>
> ~# mdadm --misc -E /dev/sda1
> Magic : a92b4efc
> Version : 1.1
> Feature Map : 0x0
> Array UUID : 9c77b030:d95ae558:5e6b5496:7191a12b
> Name : mythtv64:0 (local to host mythtv64)
> Creation Time : Sat Feb 25 13:38:51 2012
> Raid Level : raid5
> Raid Devices : 4
>
> Avail Dev Size : 48819424 (23.28 GiB 25.00 GB)
> Array Size : 73228800 (69.84 GiB 74.99 GB)
> Used Dev Size : 48819200 (23.28 GiB 25.00 GB)
> Data Offset : 2048 sectors
> Super Offset : 0 sectors
> State : clean
> Device UUID : cafa7a53:1577745a:9401f410:d8fa2bdb
>
> Update Time : Wed Nov 14 12:29:16 2012
> Checksum : d0709263 - correct
> Events : 91
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Device Role : Active device 1
> Array State : AAAA ('A' == active, '.' == missing)
>
> That shows it is an mdraid 1.1 (hence 1.x) device and hence not endian
> specific. If it said 0.9, then it was created with an older setup
> that defaulted to the old format, and it is host endianess and can not
> be moved to a machine with the opposite endianess. So x86 to powerpc
> won't work.
>
> --
> Len Sorensen
>
>
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>
niels
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