Errors In /var/log/messages on RAID5 build on SSD drives "md/raid:md2: read error not correctable (sector 1805696 on nvme011p2) " (Doc ID 2245161.1)

Last updated on MARCH 22, 2017

Applies to:

Oracle Exalytics Software - Version 2.0.0.1.0 and later
Information in this document applies to any platform.

Symptoms

Notice following errors on RAID5 build on SSD drives. /var/log/messages :

md/raid:md2: read errornot correctable (sector 1805696 on nvme011p2)

cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md3 : active raid5 nvme2n1p3[3](S) nvme1n1p3[1](F) nvme0n1p3[0]
  195179520 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/1] [U__]
md1 : active raid5 nvme2n1p1[3](S) nvme1n1p1[1](F) nvme0n1p1[0]
  390362112 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/1] [U__]
md2 : active raid5 nvme2n1p2[3](S) nvme1n1p2[1](F) nvme0n1p2[0]
  390362112 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/1] [U__]
md4 : active raid5 nvme1n1p4[1] nvme0n1p4[0]
  2929425408 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
md5 : active raid5 nvme1n1p5[1] nvme0n1p5[0]
  780985344 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
unused devices:

 Additionally have :

mdadm --detail /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Mon Feb 27 12:49:14 2017
Raid Level : raid5
Used Dev Size : 195181056 (186.14 GiB 199.87 GB)
Raid Devices : 3
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Feb 27 13:23:21 2017
State : active, FAILED, Not Started
Active Devices : 1
Working Devices : 2
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 512K
Name : poz01exa.centrala.bzwbk:2 (local to host poz01exa.centrala.bzwbk)
UUID : 184b0a8f:bcf56d3d:3ed0791e:6b5f2c84
Events : 25
Number Major Minor RaidDevice State
0 259 2 0 active sync /dev/nvme0n1p2
1 0 0 1 removed
2 0 0 2 removed

3 259 14 - spare /dev/nvme2n1p2

 

Cause

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