* Re-assemble RAID6 from SW to HW RAID
@ 2014-11-17 22:14 Mathias Burén
2014-11-17 22:51 ` Mathias Burén
0 siblings, 1 reply; 5+ messages in thread
From: Mathias Burén @ 2014-11-17 22:14 UTC (permalink / raw)
To: Linux-RAID
Hi all,
I've a 6 disk RAID6 array, with 1 missing disk. I moved 2 of the HDDs
from the on-board SATA controller to a LSI MegaRAID controller where I
created them as individual RAID0's. The data in the array isn't
important, but it'd be nice if I can reassemble it.
This is what it looks like:
$ for I in /dev/sd?;do sudo mdadm -E $I;done
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 78df2586:cb5649aa:e0b6d211:d92dc224
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 50c95b7c - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AA.AAA ('A' == active, '.' == missing)
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 41712f8c:255b0f3e:0e345f7b:e1504e42
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 71b191d6 - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AA.AAA ('A' == active, '.' == missing)
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : a09fc60d:5c4a27a5:4b89bc33:29b01582
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 528563ee - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AA.AAA ('A' == active, '.' == missing)
/dev/sde:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5860271024 (2794.40 GiB 3000.46 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 39c0b717:a9ca1dd7:bcba618f:caed0879
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 55758eeb - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AA.AAA ('A' == active, '.' == missing)
/dev/sdf:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 93568b01:632395bf:7d0082a5:db9b6ff9
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 49d756ca - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AA.AAA ('A' == active, '.' == missing)
$ ls -la /dev/disk/by-id/ | grep -v Cors | grep -v dm
lrwxrwxrwx 1 root root 9 Nov 17 22:04
ata-SAMSUNG_HD204UI_S2H7JR0B501861 -> ../../sdb
lrwxrwxrwx 1 root root 9 Nov 17 22:04
ata-WDC_WD20EARS-00J99B0_WD-WCAWZ2036074 -> ../../sdc
lrwxrwxrwx 1 root root 9 Nov 17 22:04
ata-WDC_WD20EARS-00MVWB0_WD-WMAZA6473013 -> ../../sdd
lrwxrwxrwx 1 root root 9 Nov 17 22:04
scsi-3600605b0025eff501bfd2d550b74a2d5 -> ../../sde
lrwxrwxrwx 1 root root 9 Nov 17 22:04
scsi-3600605b0025eff501bfd2d5709c4a486 -> ../../sdf
lrwxrwxrwx 1 root root 9 Nov 17 22:04 wwn-0x50000f00500b6118 -> ../../sdb
lrwxrwxrwx 1 root root 9 Nov 17 22:04 wwn-0x50014ee0030a1204 -> ../../sdd
lrwxrwxrwx 1 root root 9 Nov 17 22:04 wwn-0x50014ee206d9cbd2 -> ../../sdc
lrwxrwxrwx 1 root root 9 Nov 17 22:04
wwn-0x600605b0025eff501bfd2d550b74a2d5 -> ../../sde
lrwxrwxrwx 1 root root 9 Nov 17 22:04
wwn-0x600605b0025eff501bfd2d5709c4a486 -> ../../sdf
Any idea if this is rescuable?
Thanks
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Re-assemble RAID6 from SW to HW RAID
2014-11-17 22:14 Re-assemble RAID6 from SW to HW RAID Mathias Burén
@ 2014-11-17 22:51 ` Mathias Burén
2014-11-18 13:34 ` Phil Turmel
0 siblings, 1 reply; 5+ messages in thread
From: Mathias Burén @ 2014-11-17 22:51 UTC (permalink / raw)
To: Linux-RAID
On 17 November 2014 22:14, Mathias Burén <mathias.buren@gmail.com> wrote:
> Hi all,
>
> I've a 6 disk RAID6 array, with 1 missing disk. I moved 2 of the HDDs
> from the on-board SATA controller to a LSI MegaRAID controller where I
> created them as individual RAID0's. The data in the array isn't
> important, but it'd be nice if I can reassemble it.
>
> This is what it looks like:
>
> $ for I in /dev/sd?;do sudo mdadm -E $I;done
>
>
> /dev/sdb:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
> Name : ion:md0 (local to host ion)
> Creation Time : Tue Feb 5 17:33:27 2013
> Raid Level : raid6
> Raid Devices : 6
>
> Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
> Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
> Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : 78df2586:cb5649aa:e0b6d211:d92dc224
>
> Update Time : Tue Nov 4 21:43:49 2014
> Checksum : 50c95b7c - correct
> Events : 97557
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Device Role : Active device 5
> Array State : AA.AAA ('A' == active, '.' == missing)
> /dev/sdc:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
> Name : ion:md0 (local to host ion)
> Creation Time : Tue Feb 5 17:33:27 2013
> Raid Level : raid6
> Raid Devices : 6
>
> Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
> Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
> Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : 41712f8c:255b0f3e:0e345f7b:e1504e42
>
> Update Time : Tue Nov 4 21:43:49 2014
> Checksum : 71b191d6 - correct
> Events : 97557
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Device Role : Active device 1
> Array State : AA.AAA ('A' == active, '.' == missing)
> /dev/sdd:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
> Name : ion:md0 (local to host ion)
> Creation Time : Tue Feb 5 17:33:27 2013
> Raid Level : raid6
> Raid Devices : 6
>
> Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
> Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
> Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : a09fc60d:5c4a27a5:4b89bc33:29b01582
>
> Update Time : Tue Nov 4 21:43:49 2014
> Checksum : 528563ee - correct
> Events : 97557
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Device Role : Active device 3
> Array State : AA.AAA ('A' == active, '.' == missing)
> /dev/sde:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
> Name : ion:md0 (local to host ion)
> Creation Time : Tue Feb 5 17:33:27 2013
> Raid Level : raid6
> Raid Devices : 6
>
> Avail Dev Size : 5860271024 (2794.40 GiB 3000.46 GB)
> Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
> Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : 39c0b717:a9ca1dd7:bcba618f:caed0879
>
> Update Time : Tue Nov 4 21:43:49 2014
> Checksum : 55758eeb - correct
> Events : 97557
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Device Role : Active device 4
> Array State : AA.AAA ('A' == active, '.' == missing)
> /dev/sdf:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
> Name : ion:md0 (local to host ion)
> Creation Time : Tue Feb 5 17:33:27 2013
> Raid Level : raid6
> Raid Devices : 6
>
> Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
> Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
> Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : 93568b01:632395bf:7d0082a5:db9b6ff9
>
> Update Time : Tue Nov 4 21:43:49 2014
> Checksum : 49d756ca - correct
> Events : 97557
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Device Role : Active device 0
> Array State : AA.AAA ('A' == active, '.' == missing)
>
> $ ls -la /dev/disk/by-id/ | grep -v Cors | grep -v dm
>
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> ata-SAMSUNG_HD204UI_S2H7JR0B501861 -> ../../sdb
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> ata-WDC_WD20EARS-00J99B0_WD-WCAWZ2036074 -> ../../sdc
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> ata-WDC_WD20EARS-00MVWB0_WD-WMAZA6473013 -> ../../sdd
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> scsi-3600605b0025eff501bfd2d550b74a2d5 -> ../../sde
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> scsi-3600605b0025eff501bfd2d5709c4a486 -> ../../sdf
> lrwxrwxrwx 1 root root 9 Nov 17 22:04 wwn-0x50000f00500b6118 -> ../../sdb
> lrwxrwxrwx 1 root root 9 Nov 17 22:04 wwn-0x50014ee0030a1204 -> ../../sdd
> lrwxrwxrwx 1 root root 9 Nov 17 22:04 wwn-0x50014ee206d9cbd2 -> ../../sdc
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> wwn-0x600605b0025eff501bfd2d550b74a2d5 -> ../../sde
> lrwxrwxrwx 1 root root 9 Nov 17 22:04
> wwn-0x600605b0025eff501bfd2d5709c4a486 -> ../../sdf
>
> Any idea if this is rescuable?
>
> Thanks
I tried something, but I'm not sure how to proceed:
$ sudo mdadm --verbose --assemble /dev/md0 /dev/sdb /dev/sde /dev/sdf
/dev/sda /dev/sdd
mdadm: looking for devices for /dev/md0
mdadm: /dev/sdb is identified as a member of /dev/md0, slot 0.
mdadm: /dev/sde is identified as a member of /dev/md0, slot 1.
mdadm: /dev/sdf is identified as a member of /dev/md0, slot 3.
mdadm: /dev/sda is identified as a member of /dev/md0, slot 4.
mdadm: /dev/sdd is identified as a member of /dev/md0, slot 5.
mdadm: added /dev/sde to /dev/md0 as 1
mdadm: no uptodate device for slot 4 of /dev/md0
mdadm: added /dev/sdf to /dev/md0 as 3
mdadm: failed to add /dev/sda to /dev/md0: Invalid argument
mdadm: added /dev/sdd to /dev/md0 as 5
mdadm: failed to add /dev/sdb to /dev/md0: Invalid argument
mdadm: /dev/md0 assembled from 3 drives - need 5 to start (use --run to insist).
dmesg:
[ 1815.848865] md: md0 stopped.
[ 1815.848870] md: unbind<sdd>
[ 1815.869743] md: export_rdev(sdd)
[ 1815.869816] md: unbind<sdf>
[ 1815.894653] md: export_rdev(sdf)
[ 1815.894732] md: unbind<sde>
[ 1815.933751] md: export_rdev(sde)
[ 1823.136749] md: md0 stopped.
[ 1823.161460] md: bind<sde>
[ 1823.161556] md: bind<sdf>
[ 1823.161755] md: sda does not have a valid v1.2 superblock, not importing!
[ 1823.161759] md: md_import_device returned -22
[ 1823.161863] md: bind<sdd>
[ 1823.162029] md: sdb does not have a valid v1.2 superblock, not importing!
[ 1823.162032] md: md_import_device returned -22
[ 1823.162045] md: md0 stopped.
[ 1823.162048] md: unbind<sdd>
[ 1823.173683] md: export_rdev(sdd)
[ 1823.173690] md: unbind<sdf>
[ 1823.185723] md: export_rdev(sdf)
[ 1823.185742] md: unbind<sde>
[ 1823.193750] md: export_rdev(sde)
It appears to have a superblock?
$ sudo mdadm -E /dev/sda
/dev/sda:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5860271024 (2794.40 GiB 3000.46 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=385940480 sectors
State : clean
Device UUID : 39c0b717:a9ca1dd7:bcba618f:caed0879
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 55758eeb - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AA.AAA ('A' == active, '.' == missing, 'R' == replacing)
$ sudo mdadm -E /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0ad2603e:e43283ee:02180773:98e716ef
Name : ion:md0 (local to host ion)
Creation Time : Tue Feb 5 17:33:27 2013
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 7813531648 (7451.56 GiB 8001.06 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=18446744073706818560 sectors
State : clean
Device UUID : 93568b01:632395bf:7d0082a5:db9b6ff9
Update Time : Tue Nov 4 21:43:49 2014
Checksum : 49d756ca - correct
Events : 97557
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AA.AAA ('A' == active, '.' == missing, 'R' == replacing)
Ragards
Mathias
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Re-assemble RAID6 from SW to HW RAID
2014-11-17 22:51 ` Mathias Burén
@ 2014-11-18 13:34 ` Phil Turmel
2014-11-18 19:09 ` Drew
0 siblings, 1 reply; 5+ messages in thread
From: Phil Turmel @ 2014-11-18 13:34 UTC (permalink / raw)
To: Mathias Burén, Linux-RAID
Hi Mathias,
On 11/17/2014 05:51 PM, Mathias Burén wrote:
> On 17 November 2014 22:14, Mathias Burén <mathias.buren@gmail.com> wrote:
>> Hi all,
>>
>> I've a 6 disk RAID6 array, with 1 missing disk. I moved 2 of the HDDs
>> from the on-board SATA controller to a LSI MegaRAID controller where I
>> created them as individual RAID0's. The data in the array isn't
>> important, but it'd be nice if I can reassemble it.
[trim /]
> It appears to have a superblock?
Take a close look at your new device sizes. The hardware raid almost
certainly shortened the devices to fit its own metadata on the end. MD
v1.2 metadata contains enough info to reject the SB if the used space
doesn't fit the device.
You should look if your MegaRAID has a 'JBOD' mode for the drives.
Regards,
Phil
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Re-assemble RAID6 from SW to HW RAID
2014-11-18 13:34 ` Phil Turmel
@ 2014-11-18 19:09 ` Drew
2014-11-19 19:06 ` Mathias Burén
0 siblings, 1 reply; 5+ messages in thread
From: Drew @ 2014-11-18 19:09 UTC (permalink / raw)
To: Phil Turmel; +Cc: Mathias Burén, Linux-RAID
On Tue, Nov 18, 2014 at 5:34 AM, Phil Turmel <philip@turmel.org> wrote:
>
> You should look if your MegaRAID has a 'JBOD' mode for the drives.
Some LSI controllers, 1068e as well as 9(2,4,6)00 series controllers,
can be re-flashed to make them plain HBA's
--
Drew
"Nothing in life is to be feared. It is only to be understood."
--Marie Curie
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Re-assemble RAID6 from SW to HW RAID
2014-11-18 19:09 ` Drew
@ 2014-11-19 19:06 ` Mathias Burén
0 siblings, 0 replies; 5+ messages in thread
From: Mathias Burén @ 2014-11-19 19:06 UTC (permalink / raw)
To: Drew; +Cc: Phil Turmel, Linux-RAID
On 18 November 2014 20:09, Drew <drew.kay@gmail.com> wrote:
> On Tue, Nov 18, 2014 at 5:34 AM, Phil Turmel <philip@turmel.org> wrote:
>>
>> You should look if your MegaRAID has a 'JBOD' mode for the drives.
>
> Some LSI controllers, 1068e as well as 9(2,4,6)00 series controllers,
> can be re-flashed to make them plain HBA's
>
>
> --
> Drew
>
> "Nothing in life is to be feared. It is only to be understood."
> --Marie Curie
Yeah I tried but it didn't appear to work. Oh well it looks like I'm
rebuilding the array from scratch!
Regards
Mathias
^ permalink raw reply [flat|nested] 5+ messages in thread
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