简介
自从添加了告警之后发现qnap一直在说raid有问题，告警信息如下
RAID array 'md13' on 10.10.100.244 is in degraded state due to one or more disks failures. Number of spare drives is insufficient to fix issue automatically
也就是说raid降级了
操作
首先看下qnap下面有几个raid
[/] # ls /dev/md*
/dev/md1 /dev/md13 /dev/md2 /dev/md256 /dev/md321 /dev/md322 /dev/md9
然后看了告警的两个raid状态，都是下面这个吊样
mdadm -D /dev/md13
/dev/md13:
Version : 1.0
Creation Time : Wed Jun 10 19:03:54 2020
Raid Level : raid1
Array Size : 458880 (448.20 MiB 469.89 MB)
Used Dev Size : 458880 (448.20 MiB 469.89 MB)
Raid Devices : 65
Total Devices : 5
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Wed Jul 28 09:09:32 2021
State : clean, degraded
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Name : 13
UUID : 1ae7f759:1ee7bdcd:388738a6:0f8e85fd
Events : 109478
Number Major Minor RaidDevice State
65 8 52 0 active sync /dev/sdd4
69 8 68 1 active sync /dev/sde4
66 8 4 2 active sync /dev/sda4
67 8 20 3 active sync /dev/sdb4
68 8 36 4 active sync /dev/sdc4
10 0 0 10 removed
12 0 0 12 removed
14 0 0 14 removed
16 0 0 16 removed
18 0 0 18 removed
20 0 0 20 removed
22 0 0 22 removed
24 0 0 24 removed
26 0 0 26 removed
28 0 0 28 removed
30 0 0 30 removed
32 0 0 32 removed
磁盘个数其实有65个，太多了我就不全部展示了
然后看下mdstat
cat /proc/mdstat
md13 : active raid1 sdd4[65] sdc4[68] sdb4[67] sda4[66] sde4[69]
458880 blocks super 1.0 [65/5] [UUUUU____________________________________________________________]
bitmap: 1/1 pages [64KB], 65536KB chunk
没错emmm，这个时候只要把磁盘个数修改回来就好了
[/] # mdadm --grow /dev/md13 -n 5
raid_disks for /dev/md13 set to 5
之后就正常了
也不知道qnap是怎么搞的设置了一个65磁盘的raid
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