Lenovo ThinkAgile CP Hardware Part Replacement And Component Maintenance Procedures page 55

Name : any:md5
UUID : 5f7b873c:16d6d418:7b5f6fde:247566a7
Events : 162
Number Major Minor RaidDevice State
0 253 0 0
1 253 1 1
2 253 2 2
7 253 7 3
4 253 4 4
5 253 5 5
6 253 6 6
3 253 3 -
In this example, dm-3 is marked as failed (dm-3[3](F)).
To remove a drive from the RAID array, follow these steps:
Determine the SED mapping for dm-3:
Step 1.
# # l l s s - - l l / / d d e e v v / / m m a a p p p p e e r r / / s s e e d d * *
Following is an example output:
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed0 -> ../dm-0
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed1 -> ../dm-1
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed2 -> ../dm-2
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed3 -> ../dm-3
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed4 -> ../dm-4
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed5 -> ../dm-5
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed6 -> ../dm-6
lrwxrwxrwx. 1 root root 7 Aug 20 11:03 /dev/mapper/sed7 -> ../dm-7
In this example, dm-3 is mapped to sed3.
Determine the NVME namespace — SDE drive mapping for sd3:
Step 2.
# # c c r r y y p p t t s s e e t t u u p p s s t t a a t t u u s s / / d d e e v v / / m m a a p p p p e e r r / / s s e e d d 3 3
Following is an example output:
/dev/mapper/sed3 is active and is in use.
type: LUKS1
cipher: aes-xts-plain64
keysize: 512 bits
device: /dev/nvme3n1
offset: 4096 sectors
size: 1552723968 sectors
mode: read/write
The output displays the following information:
• sed3 is an encrypted device mapped to /dev/nvme3n1
• /dev/nvme3n1 is a namespace associated with /dev/nvme3
active sync /dev/dm-0
active sync /dev/dm-1
active sync /dev/dm-2
spare rebuilding /dev/dm-7
active sync /dev/dm-4
active sync /dev/dm-5
active sync /dev/dm-6
faulty /dev/dm-3
.
Chapter 5 Part replacement and maintenance procedures
47