The designation of the raid array?

Question

RAID

[[email protected] ~]# cat /proc/mdstat 
Personalities : [raid1] 
md4 : active raid1 sda5[1] sdb5[0]
      4194240 blocks [2/2] [UU]
      
md0 : active raid1 sda1[1] sdb1[0]
      18874304 blocks [2/2] [UU]
      
md3 : active raid1 sda4[1] sdb4[0]
      524224 blocks [2/2] [UU]
      
md1 : active raid1 sda2[1] sdb2[0]
      18874304 blocks [2/2] [UU]
      
md2 : active raid1 sda3[1] sdb3[0]
      444869568 blocks [2/2] [UU]
      bitmap: 0/4 pages [0KB], 65536KB chunk

md5 : active raid1 sda6[1] sdb6[0]
      1048512 blocks [2/2] [UU]

what does bitmap: 0/4 pages [0KB], 65536KB chunk mean,
only on one of the partitions is there such a
raid record in general in working order?

Answer 1

Everything is fine with arrays, more about bitmap: https://raid.wiki.kernel.org/index.php/Write-inten...