Hi all, I have (2) 4.6 TB drives in software Raid 1
mdadm - v3.3.2 on debian jessie. A new controller
zapped something and I have reverted to the prior built in
controller. I think 1 of the 2 is salvagable but need
some help getting the array started with the 1 drive (sda2 )
that is responding with raid info. sda2 was the other
drive and does not respond to --examine.
I think i've boiled it down to this when trying to scan/run:
mdadm: failed to add /dev/sdb2 to /dev/md/debian:0: Invalid argument
mdadm: failed to RUN_ARRAY /dev/md/debian:0: Invalid argument
Also not clear on if the name should be /dev/md0 or /dev/md/debian:0,
when I run scan/run with a name of /dev/md/debian:0 it ends up in the
/dev directory as /dev/md0
All the info follows.
I would like to get it started with the single drive / sda2 ,
in read-only mode to capture a backup.
root@mars:/home/user14# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 4.6T 0 disk
-─sda1 8:1 0 1G 0 part
|-sda2 8:2 0 4.6T 0 part
sdb 8:16 0 4.6T 0 disk
-─sdb1 8:17 0 1G 0 part
|-sdb2 8:18 0 4.6T 0 part
sdc 8:32 0 149.1G 0 disk
-─sdc1 8:33 0 78.1G 0 part
-─sdc2 8:34 0 1K 0 part
-─sdc5 8:37 0 33.6G 0 part
-─sdc6 8:38 0 18.1G 0 part
|-sdc7 8:39 0 19.2G 0 part
sdd 8:48 0 232.9G 0 disk
-─sdd1 8:49 0 8.4G 0 part /
-─sdd2 8:50 0 1K 0 part
-─sdd5 8:53 0 2.8G 0 part
-─sdd6 8:54 0 4G 0 part [SWAP]
-─sdd7 8:55 0 380M 0 part
|-sdd8 8:56 0 217.4G 0 part /home
sr0 11:0 1 1024M 0 rom
sr1 11:1 1 7.8G 0 rom
root@mars:/home/user14#
root@mars:~/raid/bin# mdadm --misc --examine /dev/sda2
mdadm: No md superblock detected on /dev/sda2.
root@mars:~/raid/bin# mdadm --misc --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 2a3489a6:b430c744:2c89a792:98521913
Name : debian:0
Creation Time : Sat May 9 17:44:25 2015
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 9765179392 (4656.40 GiB 4999.77 GB)
Array Size : 4882589696 (4656.40 GiB 4999.77 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 4697b088:5d3b1ae5:55d30f65:516df63d
Internal Bitmap : 8 sectors from superblock
Update Time : Wed Jun 14 23:53:27 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 1f245410 - expected 1f249410
Events : 129099
Device Role : Active device 1
Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
root@mars:~/raid/bin#
root@mars:~/raid/bin/util/lsdrv# ./lsdrv
PCI [sata_via] 00:0f.0 IDE interface: VIA Technologies, Inc. VT8237A SATA 2-Port Controller (rev 80)
scsi 0:0:0:0 ATA TOSHIBA MD04ACA5 {75T8K3HXFS9A}
sda 4.55t [8:0] Partitioned (gpt)
sda1 1.00g [8:1] ext2 'skip_space' {b03b8699-d492-42b1-af9e-2a68b73b733d}
sda2 4.55t [8:2] ext3 'for_raid' {5c93e223-8b7a-48b9-b4f0-6ef2990f22ae}
scsi 1:0:0:0 ATA TOSHIBA MD04ACA5 {84JHK4XKFS9A}
sdb 4.55t [8:16] Partitioned (gpt)
sdb1 1.00g [8:17] ext2 'fs_on_sdd1' {78546565-c92d-4008-b372-104c6337c11e}
sdb2 4.55t [8:18] MD raid1 (2) inactive 'debian:0' {2a3489a6-b430-c744-2c89-a79298521913}
PCI [pata_via] 00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 07)
scsi 2:0:0:0 PIONEER DVD-RW DVR-111D {PIONEER_DVD-RW_DVR-111D}
sr0 1.00g [11:0] Empty/Unknown
scsi 2:0:1:0 ATA WDC WD1600JB-00G {WD-WCAL98126376}
sdc 149.05g [8:32] Partitioned (dos)
sdc1 78.13g [8:33] ntfs {72280E84280E4795}
sdc2 1.00k [8:34] Partitioned (dos)
sdc5 33.62g [8:37] vfat {04CA-B75D}
sdc6 18.13g [8:38] ext2 'for_temp' {6cc1aa46-aaa3-4f93-8316-8924ac9ee3f2}
sdc7 19.17g [8:39] ext4 'for_var' {8d865846-5827-4f51-b826-6f672d45285d}
scsi 3:0:0:0 ATA WDC WD2500JB-00G {WD-WCAL76218162}
sdd 232.89g [8:48] Partitioned (dos)
sdd1 8.38g [8:49] ext4 {7e42bfae-8af9-4c9a-b8c2-7e70c37435a1}
Mounted as /dev/sdd1 @ /
sdd2 1.00k [8:50] Partitioned (dos)
sdd5 2.79g [8:53] ext4 {907474bc-cec7-4a80-afb0-daa963cef388}
sdd6 3.99g [8:54] swap {cbe9107e-8503-4597-8f99-5121384dfd1b}
sdd7 380.00m [8:55] ext4 {daf44546-1549-42be-b632-2be175962366}
sdd8 217.34g [8:56] ext4 {9f3bfd18-92ac-4095-b512-cc2a0b88737c}
Mounted as /dev/sdd8 @ /home
USB [usb-storage] Bus 002 Device 005: ID 0480:d010 Toshiba America Info. Systems, Inc. {20121204025996}
scsi 5:0:0:0 Toshiba External USB 3.0 {66715465}
sde 1.82t [8:64] Partitioned (dos)
sde1 1.82t [8:65] ntfs 'ELLIS' {ACAC8FDBAC8F9E88}
Mounted as /dev/sde1 @ /mnt/ellis
Other Block Devices
md0 0.00k [9:0] MD v1.2 () clear, None (None) None {None}
Empty/Unknown
root@mars:~/raid/bin/util/lsdrv#
root@mars:~/raid/bin/util/lsdrv# mdadm --manage --stop /dev/md0
mdadm: stopped /dev/md0
root@mars:~/raid/bin/util/lsdrv# mdadm --assemble /dev/md/debian:0 -v /dev/sdb2 --run
mdadm: looking for devices for /dev/md/debian:0
mdadm: /dev/sdb2 is identified as a member of /dev/md/debian:0, slot 1.
mdadm: no uptodate device for slot 0 of /dev/md/debian:0
mdadm: failed to add /dev/sdb2 to /dev/md/debian:0: Invalid argument
mdadm: failed to RUN_ARRAY /dev/md/debian:0: Invalid argument
root@mars:~/raid/bin/util/lsdrv# ls -lR /dev | grep md
lrwxrwxrwx 1 root root 25 Jun 15 21:20 initctl -> /run/systemd/initctl/fifo
lrwxrwxrwx 1 root root 28 Jun 15 21:20 log -> /run/systemd/journal/dev-log
drwxr-xr-x 2 root root 40 Jun 15 17:20 md
brw-rw---- 1 root disk 9, 0 Jun 17 21:54 md0
lrwxrwxrwx 1 root root 6 Jun 17 21:54 9:0 -> ../md0
/dev/md:
root@mars:~/raid/bin/util/lsdrv# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Raid Level : raid0
Total Devices : 0
Persistence : Superblock is persistent
State : inactive
Number Major Minor RaidDevice
root@mars:~/raid/bin/util/lsdrv#
root@mars:~/raid/bin/util/lsdrv#
root@mars:~/raid/bin/util/lsdrv# cat /proc/mdstat
Personalities :
unused devices: <none>
root@mars:~/raid/bin/util/lsdrv#
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