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--- nas:qnap:recover_raid_data [2021/09/13 11:48] – peter
+++ nas:qnap:recover_raid_data [2021/09/13 13:28] (current) – [Determine Raid Status] peter
@@ Line 4: / Line 4: @@
 <code bash>
 cat /proc/mdstat
 </code>
@@ Line 43: / Line 43: @@
 **NOTE:**  Some of these can be ignored, as used internally by QNAP.
-  * **md1**:  Data.
+QNAP NAS will be automatically cut the internal hard disk into 5 partitions after being connected.
-  * **md9**:  Configuration, update and root perhaps?
-  * **md13**:  Web interface engine and other OS extension.
+^Partition^Array^Type^Capacity*1k=1000^Mount^Use^
-  * **md256**:  Swap.
+|sda1|md9|raid1|542M|/mnt/HDA_ROOT|Save profile.  Configuration, updates and root.|
-  * **md321**:  Swap (unmounted) it is used in some way?
+|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.
 </WRAP>
+----
+===== Determine Salient Raids =====
+To ignore the internal RAIDs used by QNAP.
+<code bash>
+/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-/'
+</code>
+returns:
+<code bash>
+ 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
+</code>
+----
+===== Run md_checker =====
+**md_checker** is a QNAP script which checks the software RAID.
+<code bash>
+md_checker
+</code>
+returns:
+<code bash>
+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
+===============================================================================================
+</code>
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