Hi Simon,
On 02/10/2011 11:16 AM, Simon McNair wrote:
>
[trim /]
>
> So I tried running mdadm --create --verbose /dev/md0 --metadata=1.1
> --level=5 --raid-devices=10 missing /dev/sde1 /dev/sdf1 /dev/sdg1
> /dev/sdh1 /dev/sdi1 /dev/sdj1 /dev/sdk1 /dev/sdl1 /dev/sdm1 --chunk=64
Uh-Oh. You told mdadm to create an array with a missing member, but you didn't tell it to assume-clean.
> as it seemed that /dev/sdd1 failed to be added to the array. This did nothing.
According to your mdadm -E output below, it did what you asked: it created a new array from the devices given (note the new array UUID on the nine devices). Since you have one device missing, it can't rebuild, so you might not have lost your data yet.
That mdadm -E /dev/sdd1 reports its array assembled and clean is odd.
Please show us the output of /proc/mdstat and then "mdadm -D /dev/md*" or "mdadm -D /dev/md/*"
Phil
>
> dmesg contains:
>
> md: invalid superblock checksum on sdd1
> md: sdd1 does not have a valid v1.1 superblock, not importing!
> md: md_import_device returned -22
>
> The output of mdadm -E is as follows:
>
> proxmox:~# mdadm -E /dev/sd[d-m]1
> /dev/sdd1:
> Magic : a92b4efc
> Version : 1.1
> Feature Map : 0x0
> Array UUID : c4f62f32:4244a1db:b7746203:f10b5227
> Name : proÃlox:0
> Creation Time : Sat Aug 21 19:16:38 2010
> Raid Level : raid5
> Raid Devices : 10
>
> Avail Dev Size : 1953099512 (931.31 GiB 999.99 GB)
> Array Size : 17577894528 (8381.79 GiB 8999.88 GB)
> Used Dev Size : 1953099392 (931.31 GiB 999.99 GB)
> Data Offset : 264 sectors
> Super Offset : 0 sectors
> State : clean
> Device UUID : b0ffd0a1:866676af:3ae4c03c:d219676e
>
> Update Time : Mon Feb 7 21:08:29 2011
> Checksum : 13aa9685 - expected 93aa9672
> Events : 60802
>
> Layout : left-symmetric
> Chunk Size : 64K
>
> Device Role : Active device 0
> Array State : AAAAAAAAAA ('A' == active, '.' == missing)
> /dev/sde1:
> Magic : a92b4efc
> Version : 1.1
> Feature Map : 0x0
> Array UUID : 7d55c29e:273c35da:f6438197:0365f95f
> Name : ubuntu:0
> Creation Time : Thu Feb 10 11:59:48 2011
> Raid Level : raid5
> Raid Devices : 10
>
> Avail Dev Size : 1953099512 (931.31 GiB 999.99 GB)
> Array Size : 17577894528 (8381.79 GiB 8999.88 GB)
> Used Dev Size : 1953099392 (931.31 GiB 999.99 GB)
> Data Offset : 264 sectors
> Super Offset : 0 sectors
> State : clean
> Device UUID : 4121fa31:7543218c:f42a937d:fddf04e8
>
> Update Time : Thu Feb 10 12:17:59 2011
> Checksum : 5f965c84 - correct
> Events : 4
>
> Layout : left-symmetric
> Chunk Size : 64K
>
> Device Role : Active device 1
> Array State : .AAAAAAAAA ('A' == active, '.' == missing)
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