nas:qnap:recover_raid_data
Table of Contents
NAS - QNAP - Recover Raid Data
Determine Raid Status
cat /proc/mdstat
returns:
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md4 : active raid1 sdi3[0] 23432007232 blocks super 1.0 [1/1] [U] md3 : active raid1 sdk3[0] 23432007232 blocks super 1.0 [1/1] [U] md1 : active raid6 sdf3[0] sdd3[7] sdg3[6] sdh3[5] sdc3[4] sdb3[2] sda3[3] sde3[1] 46824429696 blocks super 1.0 level 6, 64k chunk, algorithm 2 [8/8] [UUUUUUUU] bitmap: 21/59 pages [84KB], 65536KB chunk md322 : active raid1 sdc5[7](S) sdd5[6](S) sda5[5](S) sdb5[4](S) sdg5[3](S) sdh5[2](S) sde5[1] sdf5[0] 7235136 blocks super 1.0 [2/2] [UU] bitmap: 0/1 pages [0KB], 65536KB chunk md256 : active raid1 sdc2[7](S) sdd2[6](S) sda2[5](S) sdb2[4](S) sdg2[3](S) sdh2[2](S) sde2[1] sdf2[0] 530112 blocks super 1.0 [2/2] [UU] bitmap: 0/1 pages [0KB], 65536KB chunk md13 : active raid1 sdd4[38] sdf4[0] sde4[32] sda4[34] sdb4[33] sdc4[35] sdh4[36] sdg4[37] 458880 blocks super 1.0 [33/8] [UUUUUUUU_________________________] bitmap: 1/1 pages [4KB], 65536KB chunk md9 : active raid1 sdd1[38] sdf1[0] sde1[32] sda1[34] sdb1[33] sdc1[35] sdh1[36] sdg1[37] 530048 blocks super 1.0 [32/8] [UUUUUUUU________________________] bitmap: 1/1 pages [4KB], 65536KB chunk unused devices: <none>
NOTE: Some of these can be ignored, as used internally by QNAP.
QNAP NAS will be automatically cut the internal hard disk into 5 partitions after being connected.
| Partition | Array | Type | Capacity*1k=1000 | Mount | Use |
|---|---|---|---|---|---|
| sda1 | md9 | raid1 | 542M | /mnt/HDA_ROOT | Save profile. Configuration, updates and root. |
| sda2 | md256 | raid1 | 542M | Log storage area? | |
| sda3 | md1 | Set by Storage Pool | Disk free space | Data. Storage pool. | |
| sda4 | md13 | raid1 | 469M | /mnt/ext | Plug-in storage area*. Web interface engine and other OS extension. |
| sda5 | md322 | raid1 | 7408M | SWAP. | |
- *sda4/md13 is for programs like Apache and Python, but apps like HybridBackup will soft-link to /share/XXXXXXXX/.qpkg/ (XXXXXXX may be CACHEDEV1_DATA), the actual location is the storage of sda3/md1 Pool area.
Determine Salient Raids
To ignore the internal RAIDs used by QNAP.
/bin/cat /proc/mdstat | /bin/sed '/md/i \break' | /bin/tr '\n' ' ' | /bin/awk -v RS=break '/([sv]d[a-z][a-z]*)3/' or /bin/cat /proc/mdstat | /bin/sed '/md/i \break' | /bin/tr '\n' ' ' | /bin/awk -v RS=break '/([sv]d[a-z][a-z]*|nvme[0-9a-z]*p|loop[0-9a-z]*p)3|dm-/'
returns:
md4 : active raid1 sdi3[0] 23432007232 blocks super 1.0 [1/1] [U] md3 : active raid1 sdk3[0] 23432007232 blocks super 1.0 [1/1] [U] md1 : active raid6 sdf3[0] sdd3[7] sdg3[6] sdh3[5] sdc3[4] sdb3[2] sda3[3] sde3[1] 46824429696 blocks super 1.0 level 6, 64k chunk, algorithm 2 [8/8] [UUUUUUUU] bitmap: 17/59 pages [68KB], 65536KB chunk
Run md_checker
md_checker is a QNAP script which checks the software RAID.
md_checker
returns:
Welcome to MD superblock checker (v2.0) - have a nice day~ Scanning system... RAID metadata found! UUID: 85d45e53:913fde8a:55ba7e06:ee932838 Level: raid6 Devices: 8 Name: md1 Chunk Size: 64K md Version: 1.0 Creation Time: Mar 6 17:46:54 2018 Status: ONLINE (md1) [UUUUUUUU] =============================================================================================== Enclosure | Port | Block Dev Name | # | Status | Last Update Time | Events | Array State =============================================================================================== NAS_HOST 3 /dev/sdf3 0 Active Sep 12 13:00:07 2021 16304340 AAAAAAAA NAS_HOST 4 /dev/sde3 1 Active Sep 12 13:00:07 2021 16304340 AAAAAAAA NAS_HOST 8 /dev/sda3 2 Active Sep 12 13:00:07 2021 16304339 AAAAAAAA NAS_HOST 7 /dev/sdb3 3 Active Sep 12 13:00:07 2021 16304339 AAAAAAAA NAS_HOST 10 /dev/sdc3 4 Active Sep 12 13:00:07 2021 16304339 AAAAAAAA NAS_HOST 5 /dev/sdh3 5 Active Sep 12 13:00:07 2021 16304340 AAAAAAAA NAS_HOST 6 /dev/sdg3 6 Active Sep 12 13:00:07 2021 16304339 AAAAAAAA NAS_HOST 9 /dev/sdd3 7 Active Sep 12 13:00:07 2021 16304339 AAAAAAAA =============================================================================================== RAID metadata found! UUID: a854a177:bc9e00db:b74ad2cc:2d12160c Level: raid1 Devices: 1 Name: md3 Chunk Size: - md Version: 1.0 Creation Time: Aug 21 18:43:43 2019 Status: ONLINE (md3) [U] =============================================================================================== Enclosure | Port | Block Dev Name | # | Status | Last Update Time | Events | Array State =============================================================================================== EXDR#1 101 /dev/sdk3 0 Active Sep 12 12:58:42 2021 154 A =============================================================================================== RAID metadata found! UUID: a3eade8c:17af5977:cb38c229:1635d0a0 Level: raid1 Devices: 1 Name: md4 Chunk Size: - md Version: 1.0 Creation Time: Jun 21 00:14:24 2019 Status: ONLINE (md4) [U] =============================================================================================== Enclosure | Port | Block Dev Name | # | Status | Last Update Time | Events | Array State =============================================================================================== EXDR#3 101 /dev/sdi3 0 Active Sep 12 12:58:36 2021 162 A ===============================================================================================
nas/qnap/recover_raid_data.txt · Last modified: 2021/09/13 13:28 by peter