Speicherboy

sudo mdadm --detail /dev/md
mdadm: /dev/md does not appear to be an md device

sudo mdadm --detail /dev/md2
/dev/md2:
Version : 1.0
Creation Time : Fri Jul  8 20:55:13 2011
Raid Level : raid6
Array Size : 5797625088 (5.40 TiB 5.94 TB)
Used Dev Size : 1932541696 (1843.02 GiB 1978.92 GB)
Raid Devices : 5
Total Devices : 5
Persistence : Superblock is persistent

Intent Bitmap : Internal

Update Time : Sun Mar  9 10:40:08 2025
State : clean
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0

Layout : left-symmetric
Chunk Size : 128K

Consistency Policy : bitmap

Name : speicherboy:2  (local to host speicherboy)
UUID : 9827dac2:c5f2da90:3b95e739:fe0493f1
Events : 160984

Number   Major   Minor   RaidDevice State
4       8       34        0      active sync   /dev/sdc2
7       8       66        1      active sync   /dev/sde2
6       8        2        2      active sync   /dev/sda2
8       8       50        3      active sync   /dev/sdd2
5       8       18        4      active sync   /dev/sdb2

Zwei platten auf faulty setzen und entfernen

  # mdadm /dev/md2 --fail /dev/sdXY

RAID stoppen

  mdadm -S /dev/md2
  # mdadm -A /dev/md2

Platten auswählen (3 /dev/sdd2/4 /dev/sdb2)

 mdadm --detail /dev/md2
  8       8       50        3      active sync   /dev/sdd2
  5       8       18        4      active sync   /dev/sdb2

Seriennummern ermitteln

 hdparm -I /dev/sd? | grep -E '(Serial Number|/dev/)'
  /dev/sdd: Serial Number:      WD-WCAZA5427816
  /dev/sdb: Serial Number:      WD-WCAZA5466697

  mdadm /dev/md2 --remove /dev/sdd2
  mdadm /dev/md2 --remove /dev/sdb2
   
 root@speicherboy ~ # mdadm /dev/md2 --fail /dev/sdd2
 mdadm: set /dev/sdd2 faulty in /dev/md2

 root@speicherboy ~ # mdadm /dev/md2 --remove /dev/sdd2
 mdadm: hot removed /dev/sdd2 from /dev/md2

 root@speicherboy ~ # mdadm --detail /dev/md2
 /dev/md2:
 Version : 1.0
 Creation Time : Fri Jul  8 20:55:13 2011
 Raid Level : raid6
 Array Size : 5797625088 (5.40 TiB 5.94 TB)
 Used Dev Size : 1932541696 (1843.02 GiB 1978.92 GB)
 Raid Devices : 5
 Total Devices : 4
 Persistence : Superblock is persistent

 Intent Bitmap : Internal

 Update Time : Sun Mar  9 11:31:05 2025
 State : clean, degraded
 Active Devices : 4
 Working Devices : 4
 Failed Devices : 0
 Spare Devices : 0

 Layout : left-symmetric
 Chunk Size : 128K

 Consistency Policy : bitmap

 Name : speicherboy:2  (local to host speicherboy)
 UUID : 9827dac2:c5f2da90:3b95e739:fe0493f1
 Events : 160986

 Number   Major   Minor   RaidDevice State
 4       8       34        0      active sync   /dev/sdc2
 7       8       66        1      active sync   /dev/sde2
 6       8        2        2      active sync   /dev/sda2
 -       0        0        3      removed
 5       8       18        4      active sync   /dev/sdb2

 root@speicherboy ~ # cat /proc/mdstat
  Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10]
  md2 : active raid6 sda2[6] sdb2[4] sdd2[7]
  5797625088 blocks super 1.0 level 6, 128k chunk, algorithm 2 [5/3] [UUU__]
  bitmap: 1/15 pages [4KB], 65536KB chunk
  
  unused devices: <none>

Neues RAID

Zwei Platten

Identifizieren

 root@speicherboy ~ # hdparm -I /dev/sd? | grep -E '(Serial Number|/dev/)'
 /dev/sda:
 Serial Number:      ZR15Q1Y0
 /dev/sdb:
 Serial Number:      ZR15PPMN
 /dev/sdc:
 Serial Number:      WD-WCAZA5453665
 /dev/sdd:
 Serial Number:      WD-WMC4N0252662
 /dev/sde:
 Serial Number:      184271802787
 /dev/sdf:
 Serial Number:      WD-WMC4M0D7KR69

Neues RAID

RAID 6 mit zwei platten missing erstellen

sudo mdadm --create --verbose /dev/md3 --level=6 --raid-devices=4 /dev/sda /dev/sdb missing  missing