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--- mdadm [2019/06/02 23:39]
0.0.0.0 vytvořeno
+++ mdadm [2022/05/27 15:08]
simandl
@@ Řádek 2: / Řádek 2: @@
 =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
-mdadm --manage /dev/md0 --add /dev/sdc3
+  echo idle > /sys/block/md0/md/sync_action
-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):
- echo frozen > /sys/block/md0/md/sync_action
- echo none > /sys/block/md0/md/resync_start
- echo idle > /sys/block/md0/md/sync_action
 =3T disk=
- [[root@simlin|~]]# parted /dev/sde
+  [[root@simlin|~]]# parted /dev/sde
- GNU Parted 1.8.1
+  GNU Parted 1.8.1
- Using /dev/sde
+  Using /dev/sde
- Welcome to GNU Parted! Type 'help' to view a list of commands.
+  Welcome to GNU Parted! Type 'help' to view a list of commands.
- (parted) mklabel gpt
+  (parted) mklabel gpt
- (parted) unit TB
+  (parted) unit TB
- (parted) mkpart primary 0 3
+  (parted) mkpart primary 0 3
- (parted) print
+  (parted) print
- Model: ATA WDC WD30EFRX-68A (scsi)
+  Model: ATA WDC WD30EFRX-68A (scsi)
- Disk /dev/sde: 3.00TB
+  Disk /dev/sde: 3.00TB
- Sector size (logical/physical): 512B/512B
+  Sector size (logical/physical): 512B/512B
- Partition Table: gpt
+  Partition Table: gpt
- Number  Start   End     Size    File system  Name     Flags
+  Number  Start   End     Size    File system  Name     Flags
       0.00TB  3.00TB  3.00TB               primary
- (parted) quit
+  (parted) quit
- Information: Don't forget to update /etc/fstab, if necessary.
+  Information: Don'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
+  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
+  mkfs.ext3 -b 4096 -E stride=256,stripe-width=256 /dev/md1
 =Repair bad blocks=
@@ Řádek 75: / Řádek 75: @@
 You just need to have mdraid scrub the mirror. It'll notice the bad sector, and rewrite it automatically.
- echo 'check' > /sys/block/mdX/md/sync_action    # use 'repair' instead for older kernels
+  echo 'check' > /sys/block/mdX/md/sync_action    # use 'repair' instead for older kernels
- #!/bin/bash
+  #!/bin/bash
- save="$(tput sc)";
+  save="$(tput sc)";
- clear="$(tput rc)$(tput el)";
+  clear="$(tput rc)$(tput el)";
- for sync in /sys/block/md*/md/sync_action; do
+  for sync in /sys/block/md*/md/sync_action; do
     md="$(echo "$sync" | cut -d/ -f4)"
     cmpl="/sys/block/$md/md/sync_completed"
@@ Řádek 104: / Řádek 104: @@
             exit 1
             ;;
-    esac
+     esac
-    echo -n "Repair $md...$save" >&2
+     echo -n "Repair $md...$save" >&2
-    read current < "$sync"
+     read current < "$sync"
-    while [[|"$current" != "idle" ]]; do
+     while [[|"$current" != "idle" ]]; do
-        read stat < "$cmpl"
+         read stat < "$cmpl"
-        echo -n "$clear $stat" >&2
+         echo -n "$clear $stat" >&2
-        sleep 1
+         sleep 1
-        read current < "$sync"
+         read current < "$sync"
-    done
+     done
-    echo "$clear done." >&2;
+     echo "$clear done." >&2;
- done
+  done
- for dev in /dev/sd?; do
+  for dev in /dev/sd?; do
-    echo "Starting offline data collection for $dev."
+     echo "Starting offline data collection for $dev."
-    smartctl -t offline "$dev"
+     smartctl -t offline "$dev"
- done
+  done
 =Example=
- [[root@simlin|~]]# cat /proc/mdstat
+  [[root@simlin|~]]# cat /proc/mdstat
- Personalities : [[raid1]]
+  Personalities : [[raid1]]
- md0 : active raid1 sdb1[[2]] sda1[[1]]
+  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>
+  unused devices: <none>
- [[root@simlin|~]]# cat /sys/block/md0/md/sync_action
+  [[root@simlin|~]]# cat /sys/block/md0/md/sync_action
- idle
+  idle
- [[root@simlin|~]]# echo 'check' > /sys/block/md0/md/sync_action
+  [[root@simlin|~]]# echo 'check' > /sys/block/md0/md/sync_action
- [[root@simlin|~]]# cat /sys/block/md0/md/sync_action
+  [[root@simlin|~]]# cat /sys/block/md0/md/sync_action
- check
+  check
- [[root@simlin|~]]# cat /proc/mdstat
+  [[root@simlin|~]]# cat /proc/mdstat
- Personalities : [[raid1]]
+  Personalities : [[raid1]]
- md0 : active raid1 sdb1[[2]] sda1[[1]]
+  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
- unused devices: <none>
+  unused devices: <none>

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