不久前,我mdadm
用RAID6中的4个驱动器创建了新的软件RAID阵列()。似乎工作正常。mdstat
如下:
Personalities : [raid6] [raid5] [raid4]
md0 : active raid6 sda1[0] sde1[3] sdd1[2] sdb1[1]
1953260544 blocks super 1.2 level 6, 512k chunk, algorithm 2 [4/4] [UUUU]
bitmap: 0/8 pages [0KB], 65536KB chunk
unused devices: <none>
困扰我的是那bitmap: 0/8 pages
部分,我不理解。
问题是:这是否是潜在的问题?并且请详细说明一下位图的实际含义。
该数组的完整细节如下:
/dev/md0:
Version : 1.2
Creation Time : Tue Nov 1 13:44:13 2016
Raid Level : raid6
Array Size : 1953260544 (1862.77 GiB 2000.14 GB)
Used Dev Size : 976630272 (931.39 GiB 1000.07 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Fri Dec 2 13:05:18 2016
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : backup-server:0 (local to host backup-server)
UUID : 023f115d:212b130c:f05b072b:b14c2819
Events : 1664
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
2 8 49 2 active sync /dev/sdd1
3 8 65 3 active sync /dev/sde1