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| Started by | Michel Dubois <michel.dubois.mtl@gmail.com> |
|---|---|
| First post | 2016-07-17 21:20 +0200 |
| Last post | 2016-07-18 12:10 +0200 |
| Articles | 2 — 2 participants |
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Re: Recover filenames from failed RAID0 Michel Dubois <michel.dubois.mtl@gmail.com> - 2016-07-17 21:20 +0200
Re: Recover filenames from failed RAID0 keld@keldix.com - 2016-07-18 12:10 +0200
| From | Michel Dubois <michel.dubois.mtl@gmail.com> |
|---|---|
| Date | 2016-07-17 21:20 +0200 |
| Subject | Re: Recover filenames from failed RAID0 |
| Message-ID | <rVZLz-4EW-3@gated-at.bofh.it> |
Dear linux-raid mailing list,
I have a RAID0 array of four 3TB disks that failed on the "third" disk.
I am aware of the non-redundancy of RAID0 but I would like to recover
the filenames from that RAID0. If I could recover some data it would
be a bonus.
Below you'll find the outputs of the following commands
mdadm --examine /dev/sd[abcd]1
fdisk -l
where sda1, sdb1, sdc1 and sdd1 should be the 4 RAID devices.
What could be my next step?
I thank you for your time
Michel Dubois
======================
mdadm --examine /dev/sd[abcd]1
/dev/sda1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7d247a6e:7b5d46c8:f52d9c89:db304b21
Creation Time : Mon Apr 23 19:55:36 2012
Raid Level : raid1
Used Dev Size : 20980800 (20.01 GiB 21.48 GB)
Array Size : 20980800 (20.01 GiB 21.48 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Mon Jun 27 21:12:23 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 1a57db60 - correct
Events : 164275
Number Major Minor RaidDevice State
this 0 8 1 0 active sync /dev/sda1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
2 2 0 0 2 faulty removed
3 3 8 33 3 active sync /dev/sdc1
/dev/sdb1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7d247a6e:7b5d46c8:f52d9c89:db304b21
Creation Time : Mon Apr 23 19:55:36 2012
Raid Level : raid1
Used Dev Size : 20980800 (20.01 GiB 21.48 GB)
Array Size : 20980800 (20.01 GiB 21.48 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Mon Jun 27 21:12:23 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 1a57db72 - correct
Events : 164275
Number Major Minor RaidDevice State
this 1 8 17 1 active sync /dev/sdb1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
2 2 0 0 2 faulty removed
3 3 8 33 3 active sync /dev/sdc1
/dev/sdc1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7d247a6e:7b5d46c8:f52d9c89:db304b21
Creation Time : Mon Apr 23 19:55:36 2012
Raid Level : raid1
Used Dev Size : 20980800 (20.01 GiB 21.48 GB)
Array Size : 20980800 (20.01 GiB 21.48 GB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Mon Jun 27 21:12:23 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 1a57db86 - correct
Events : 164275
Number Major Minor RaidDevice State
this 3 8 33 3 active sync /dev/sdc1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
2 2 0 0 2 faulty removed
3 3 8 33 3 active sync /dev/sdc1
======================
fdisk -l
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util
fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 3000.5 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x03afffbe
Device Boot Start End Blocks Id System
/dev/sda1 1 267350 2147483647+ ee EFI GPT
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util
fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 3000.5 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x142a889c
Device Boot Start End Blocks Id System
/dev/sdb1 1 267350 2147483647+ ee EFI GPT
WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util
fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdc: 3000.5 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x3daebd50
Device Boot Start End Blocks Id System
/dev/sdc1 1 267350 2147483647+ ee EFI GPT
Disk /dev/md0: 21.4 GB, 21484339200 bytes
2 heads, 4 sectors/track, 5245200 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk identifier: 0x00000000
Disk /dev/md0 doesn't contain a valid partition table
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| From | keld@keldix.com |
|---|---|
| Date | 2016-07-18 12:10 +0200 |
| Message-ID | <rWdES-4PX-13@gated-at.bofh.it> |
| In reply to | #1445090 |
Hi Which file system did you use? I once wrote some code to get files out of an ext3 filesystem, http://www.open-std.org/keld/readme-salvage.html Maybe you can make some corrections for it to work as I remember the code, then if you hit a directory, it will salvage the file names and the files of that directory. Best regards keld On Sun, Jul 17, 2016 at 03:10:03PM -0400, Michel Dubois wrote: > Dear linux-raid mailing list, > > I have a RAID0 array of four 3TB disks that failed on the "third" disk. > > I am aware of the non-redundancy of RAID0 but I would like to recover > the filenames from that RAID0. If I could recover some data it would > be a bonus. > > Below you'll find the outputs of the following commands > mdadm --examine /dev/sd[abcd]1 > fdisk -l > > where sda1, sdb1, sdc1 and sdd1 should be the 4 RAID devices. > > What could be my next step? > > I thank you for your time > > Michel Dubois > > ====================== > mdadm --examine /dev/sd[abcd]1 > /dev/sda1: > Magic : a92b4efc > Version : 00.90.00 > UUID : 7d247a6e:7b5d46c8:f52d9c89:db304b21 > Creation Time : Mon Apr 23 19:55:36 2012 > Raid Level : raid1 > Used Dev Size : 20980800 (20.01 GiB 21.48 GB) > Array Size : 20980800 (20.01 GiB 21.48 GB) > Raid Devices : 4 > Total Devices : 3 > Preferred Minor : 0 > > Update Time : Mon Jun 27 21:12:23 2016 > State : clean > Active Devices : 3 > Working Devices : 3 > Failed Devices : 1 > Spare Devices : 0 > Checksum : 1a57db60 - correct > Events : 164275 > > > Number Major Minor RaidDevice State > this 0 8 1 0 active sync /dev/sda1 > > 0 0 8 1 0 active sync /dev/sda1 > 1 1 8 17 1 active sync /dev/sdb1 > 2 2 0 0 2 faulty removed > 3 3 8 33 3 active sync /dev/sdc1 > /dev/sdb1: > Magic : a92b4efc > Version : 00.90.00 > UUID : 7d247a6e:7b5d46c8:f52d9c89:db304b21 > Creation Time : Mon Apr 23 19:55:36 2012 > Raid Level : raid1 > Used Dev Size : 20980800 (20.01 GiB 21.48 GB) > Array Size : 20980800 (20.01 GiB 21.48 GB) > Raid Devices : 4 > Total Devices : 3 > Preferred Minor : 0 > > Update Time : Mon Jun 27 21:12:23 2016 > State : clean > Active Devices : 3 > Working Devices : 3 > Failed Devices : 1 > Spare Devices : 0 > Checksum : 1a57db72 - correct > Events : 164275 > > > Number Major Minor RaidDevice State > this 1 8 17 1 active sync /dev/sdb1 > > 0 0 8 1 0 active sync /dev/sda1 > 1 1 8 17 1 active sync /dev/sdb1 > 2 2 0 0 2 faulty removed > 3 3 8 33 3 active sync /dev/sdc1 > /dev/sdc1: > Magic : a92b4efc > Version : 00.90.00 > UUID : 7d247a6e:7b5d46c8:f52d9c89:db304b21 > Creation Time : Mon Apr 23 19:55:36 2012 > Raid Level : raid1 > Used Dev Size : 20980800 (20.01 GiB 21.48 GB) > Array Size : 20980800 (20.01 GiB 21.48 GB) > Raid Devices : 4 > Total Devices : 3 > Preferred Minor : 0 > > Update Time : Mon Jun 27 21:12:23 2016 > State : clean > Active Devices : 3 > Working Devices : 3 > Failed Devices : 1 > Spare Devices : 0 > Checksum : 1a57db86 - correct > Events : 164275 > > > Number Major Minor RaidDevice State > this 3 8 33 3 active sync /dev/sdc1 > > 0 0 8 1 0 active sync /dev/sda1 > 1 1 8 17 1 active sync /dev/sdb1 > 2 2 0 0 2 faulty removed > 3 3 8 33 3 active sync /dev/sdc1 > > ====================== > fdisk -l > > WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util > fdisk doesn't support GPT. Use GNU Parted. > > > Disk /dev/sda: 3000.5 GB, 3000592982016 bytes > 255 heads, 63 sectors/track, 364801 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x03afffbe > > Device Boot Start End Blocks Id System > /dev/sda1 1 267350 2147483647+ ee EFI GPT > > WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util > fdisk doesn't support GPT. Use GNU Parted. > > > Disk /dev/sdb: 3000.5 GB, 3000592982016 bytes > 255 heads, 63 sectors/track, 364801 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x142a889c > > Device Boot Start End Blocks Id System > /dev/sdb1 1 267350 2147483647+ ee EFI GPT > > WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util > fdisk doesn't support GPT. Use GNU Parted. > > > Disk /dev/sdc: 3000.5 GB, 3000592982016 bytes > 255 heads, 63 sectors/track, 364801 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x3daebd50 > > Device Boot Start End Blocks Id System > /dev/sdc1 1 267350 2147483647+ ee EFI GPT > > Disk /dev/md0: 21.4 GB, 21484339200 bytes > 2 heads, 4 sectors/track, 5245200 cylinders > Units = cylinders of 8 * 512 = 4096 bytes > Disk identifier: 0x00000000 > > Disk /dev/md0 doesn't contain a valid partition table > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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