RAID1 to RAID5 migration with power failure and drastically reduced reconstruction time

[Charlie84510]

Hello,

I add the HDDs as I go and test the migration from RAID1 -> RAID5 -> RAID6 (in the end 6 HDDs) on a TVS-872N NAS.

I was in the process of migrating from RAID1 to RAID5 with 3 HDDs of 16TB, announced time of 56 hours.
After 8 hours (there were therefore 48 hours remaining), power cut, restart and there are only 2 hours left to complete the migration!
I am checking all filesystems and so far nothing is wrong.

Why 56 hours announced and after a reboot, it ends in 10 hours?

Can someone enlighten me on this situation?

[dolbyman]

via SSH issue a

Code: Select all

cat /proc/mdstat

and

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md_checker

to see the status of the RAID

post the results in code tags

[Charlie84510]

Here is the result:

[~] # cat /proc/mdstat

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Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multi path]
md2 : active raid5 sdb3[0] sda3[2] sdc3[1]
      31231837696 blocks super 1.0 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

md1 : active raid1 nvme1n1p3[0] nvme0n1p3[1]
      870126080 blocks super 1.0 [2/2] [UU]

md322 : active raid1 sda5[2](S) sdc5[1] sdb5[0]
      7235136 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md256 : active raid1 sda2[2](S) sdc2[1] sdb2[0]
      530112 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md321 : active raid1 nvme0n1p5[2] nvme1n1p5[0]
      8283712 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md13 : active raid1 nvme1n1p4[0] sdc4[39] sdb4[34] sda4[35] nvme0n1p4[1]
      458880 blocks super 1.0 [34/5] [UUU_U____U________________________]
      bitmap: 1/1 pages [4KB], 65536KB chunk

md9 : active raid1 nvme1n1p1[0] sdc1[40] sdb1[39] sda1[36] nvme0n1p1[1]
      530048 blocks super 1.0 [36/5] [UUU_U____U__________________________]
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>

[~] # md_checker

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Welcome to MD superblock checker (v2.0) - have a nice day~

Scanning system...

RAID metadata found!
UUID:           c0c8c229:6b46cea1:3a1cf3c6:93f61f09
Level:          raid5
Devices:        3
Name:           md2
Chunk Size:     64K
md Version:     1.0
Creation Time:  Feb 6 11:28:34 2021
Status:         ONLINE (md2) [UUU]
===============================================================================================
 Enclosure | Port | Block Dev Name | # | Status |   Last Update Time   | Events | Array State
===============================================================================================
 NAS_HOST       1        /dev/sdb3   0   Active   Feb 22 19:00:15 2021    16625   AAA
 NAS_HOST       2        /dev/sdc3   1   Active   Feb 22 19:00:15 2021    16625   AAA
 NAS_HOST       3        /dev/sda3   2   Active   Feb 22 19:00:15 2021    16625   AAA
===============================================================================================

RAID metadata found!
UUID:           987a236c:5697423f:907232b3:fa47e493
Level:          raid1
Devices:        2
Name:           md1
Chunk Size:     -
md Version:     1.0
Creation Time:  Jan 28 16:22:09 2021
Status:         ONLINE (md1) [UU]
===============================================================================================
 Enclosure | Port | Block Dev Name | # | Status |   Last Update Time   | Events | Array State
===============================================================================================
 NAS_HOST    P1-1   /dev/nvme1n1p3   0   Active   Feb 22 20:14:40 2021       12   AA
 NAS_HOST    P1-2   /dev/nvme0n1p3   1   Active   Feb 22 20:14:40 2021       12   AA
===============================================================================================

Everything seems correct

[dolbyman]

seems fine .. the disks on md13 and md9 look a bit weird [UUU_U____U__________________________] .. but as long as there is no issues, all should be good

[Charlie84510]

Thank you dolbyman for this analysis.

There are currently only 3 HDs in the NAS.
I think the others are tests with discs I made and some of which were faulty.