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mdadm [2019/05/05 23:50]
0.0.0.0 vytvořeno
mdadm [2022/05/27 15:08] (aktuální)
simandl
Řádek 2: Řádek 2:
  
 =mdadm příkazy= =mdadm příkazy=
-mdadm --create /dev/md0 --level=1 --raid-devices=2 /​dev/​sd[[ab]]1+  ​mdadm --create /dev/md0 --level=1 --raid-devices=2 /​dev/​sd[[ab]]1 
 +   
 +  mdadm --manage /dev/md0 --fail /dev/sdb3 
 +   
 +  mdadm --manage /dev/md0 --remove /dev/sdb3
  
-mdadm --manage /dev/md0 --fail /dev/sdb3+  ​mdadm --manage /dev/md0 --add /dev/sdc3 
 +   
 +  echo '​DEVICE /​dev/​hd*[[0-9]] /​dev/​sd*[[0-9]]'​ > mdadm.conf 
 +   
 +  mdadm --detail --scan >> mdadm.conf 
 +   
 +  mdadm --grow --bitmap=internal /dev/md0 
 +   
 +  mdadm --grow --bitmap=none /dev/md0 
 +   
 +  mdadm --assemble /​dev/​md3 ​/​dev/​sdb3 ​/dev/sdc3 
 +   
 +  umount /dev/md0 
 +   
 +  mdadm --manage /dev/md0 --stop 
 +   
 +  mdadm --zero-superblock /dev/sdg1 
 +   
 +  mdadm --create /dev/md0 --chunk=128 --level=raid6 --raid-devices=6 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sdg1 
 +   
 +  mdadm --run --readonly /dev/md0 
 +   
 +  mdadm --examine /dev/sda1 
 +   
 +  mdadm -S /dev/md0 
 +   
 +  mdadm --assemble /dev/md0 --force --uuid=a4bd7fc2:​b4d40d24:​e3edfc41:​b9f1a521 
 +   
 +  You can cancel an array resync in progress using the following sequence of commands (as root):
  
-mdadm --manage ​/dev/md0 --remove ​/dev/sdb3+  echo frozen > /sys/​block/​md0/​md/​sync_action 
 +  echo none > /​sys/​block/​md0/​md/​resync_start 
 +  echo idle > /sys/block/md0/md/sync_action
  
-mdadm --manage ​/dev/md0 --add /dev/sdc3+=3T disk= 
 +  [[root@simlin|~]]#​ parted ​/dev/sde 
 +  GNU Parted 1.8.1 
 +  Using /dev/sde 
 +  Welcome to GNU Parted! Type '​help'​ to view a list of commands. 
 +  (parted) mklabel gpt 
 +  (parted) unit TB 
 +  (parted) mkpart primary 0 3 
 +  (parted) print 
 +   
 +  Model: ATA WDC WD30EFRX-68A (scsi) 
 +  Disk /dev/sde: 3.00TB 
 +  Sector size (logical/​physical):​ 512B/512B 
 +  Partition Table: gpt 
 +   
 +  Number ​ Start   ​End ​    ​Size ​   File system ​ Name     ​Flags 
 +   ​1 ​     0.00TB ​ 3.00TB ​ 3.00TB ​              ​primary 
 +   
 +  (parted) quit 
 +  Information:​ Don't forget to update /etc/fstab, if necessary.
  
-echo '​DEVICE ​/dev/hd*[[0-9]] ​/dev/sd*[[0-9]]'​ > mdadm.conf+=mkfs= 
 +http://busybox.net/~aldot/mkfs_stride.html
  
-mdadm --detail ​--scan >> mdadm.conf+  ​mdadm --create /​dev/​md1 ​--level=1 --chunk=1024 --raid-devices=2 /​dev/​sd[[de]]1 
 +  mkfs.ext3 -b 4096 -E stride=256,​stripe-width=256 /dev/md1
  
-mdadm --grow --bitmap=internal /dev/md0+=Repair bad blocks=
  
-mdadm --grow --bitmap=none /dev/md0+https://​unix.stackexchange.com/​questions/​42277/​linux-repairing-bad-blocks-on-a-raid1-array-with-gpt
  
-mdadm --assemble /dev/md3 /dev/sdb3 /dev/sdc3+You just need to have mdraid scrub the mirror. It'll notice the bad sector, and rewrite it automatically.
  
-umount ​/dev/md0+  echo '​check'​ > /sys/block/​mdX/​md/​sync_action ​   # use '​repair'​ instead for older kernels
  
-mdadm --manage ​/dev/md0 --stop +  #!/bin/bash 
- +   
-mdadm --zero-superblock /dev/sdg1 +  ​save="​$(tput sc)"; 
- +  clear="​$(tput rc)$(tput el)"; 
-mdadm --create /dev/md0 --chunk=128 --level=raid6 --raid-devices=6 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sdg1 +  for sync in /sys/block/md*/md/sync_action;​ do 
- +    ​md="​$(echo "​$sync"​ | cut -d/ -f4)" 
-mdadm --run --readonly ​/dev/md0 +    cmpl="/sys/block/$md/md/​sync_completed"​
- +
-mdadm --examine ​/dev/sda1 +
- +
-mdadm -S /dev/md0 +
- +
-mdadm --assemble ​/dev/​md0 ​--force --uuid=a4bd7fc2:​b4d40d24:​e3edfc41:​b9f1a521 +
- +
-=3T disk= +
- ​[[root@simlin|~]]#​ parted ​/dev/sde +
- GNU Parted 1.8.1 +
- ​Using ​/dev/sde +
- ​Welcome to GNU Parted! Type '​help'​ to view a list of commands. +
- ​(parted) mklabel gpt +
- ​(parted) unit TB +
- ​(parted) mkpart primary 0 3 +
- ​(parted) print+
    
- ​Model:​ ATA WDC WD30EFRX-68A (scsi+    # check current state and get it repairing. 
- Disk /dev/sde3.00TB +    read current < "​$sync"​ 
- Sector size (logical/​physical): 512B/512B +    case "​$current"​ in 
- Partition Tablegpt+        idle
 +            echo '​repair'​ > "​$sync"​ 
 +            true 
 +            ;; 
 +        repair) 
 +            echo "​WARNING$md already repairing"​ 
 +            ;; 
 +        check) 
 +            echo "​WARNING$md checking, aborting check and starting repair"​ 
 +            echo '​idle'​ > "​$sync"​ 
 +            echo '​repair'​ > "​$sync"​ 
 +            ;; 
 +        *) 
 +            echo "ERROR$md in unknown state $current. ABORT."​ 
 +            exit 1 
 +            ;; 
 +     esac
    
- Number ​ Start   ​End ​    ​Size ​   File system ​ Name     ​Flags +     echo -n "​Repair $md...$save"​ >&​2 
-  1      0.00TB  ​3.00TB  3.00TB               ​primary+     read current < "​$sync"​ 
 +     while [[|"​$current"​ != "​idle"​ ]]; do 
 +         read stat < "​$cmpl"​ 
 +         echo -n "​$clear $stat" >&​2 
 +         sleep 1 
 +         read current < "​$sync"​ 
 +     ​done 
 +     echo "​$clear done." >&​2;​ 
 +  done 
 +   
 +  for dev in /dev/sd?; do 
 +     ​echo "​Starting offline data collection for $dev."​ 
 +     ​smartctl -t offline "​$dev"​ 
 +  ​done 
 + 
 +=Example= 
 +  [[root@simlin|~]]#​ cat /​proc/​mdstat  
 +  Personalities : [[raid1]]  
 +  md0 : active raid1 sdb1[[2]] sda1[[1]] 
 +       ​2930266412 blocks super 1.0 [[2/2]] [UU] 
 +       ​bitmap: ​3/22 pages [[12KB]], 65536KB chunk 
 +   
 +  unused devices: <​none>​ 
 +  [[root@simlin|~]]#​ cat /​sys/​block/​md0/​md/​sync_action 
 +  idle 
 +  [[root@simlin|~]]#​ echo '​check'​ > /​sys/​block/​md0/​md/​sync_action 
 +  [[root@simlin|~]]#​ cat /​sys/​block/​md0/​md/​sync_action 
 +  check 
 +  [[root@simlin|~]]#​ cat /​proc/​mdstat  
 +  Personalities : [[raid1]]  
 +  md0 : active raid1 sdb1[[2]] sda1[[1]] 
 +       ​2930266412 blocks super 1.0 [[2/2]] [UU] 
 +       ​[[>​....................]]  check =  0.0% (12672/​2930266412) finish=42340.2min speed=1152K/​sec 
 +       ​bitmap:​ 3/22 pages [[12KB]], 65536KB chunk
    
- ​(parted) quit +  unused devices<​none>​
- ​InformationDon't forget to update /etc/fstab, if necessary. +
- +
-=mkfs= +
-http://​busybox.net/​~aldot/​mkfs_stride.html +
- +
- mdadm --create /dev/md1 --level=1 --chunk=1024 --raid-devices=2 /​dev/​sd[[de]]1 +
- ​mkfs.ext3 -b 4096 -E stride=256,​stripe-width=256 /dev/md1+
Tisk/export