Rozdíly
Zde můžete vidět rozdíly mezi vybranou verzí a aktuální verzí dané stránky.
| Následující verze Obě strany příští revize | |||
|
mdadm [2019/05/05 23:50] 0.0.0.0 vytvořeno |
mdadm [2019/06/02 23:39] 0.0.0.0 vytvořeno |
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|---|---|---|---|
| Řádek 35: | Řádek 35: | ||
| mdadm --assemble /dev/md0 --force --uuid=a4bd7fc2:b4d40d24:e3edfc41:b9f1a521 | 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= | =3T disk= | ||
| Řádek 62: | Řádek 68: | ||
| 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= | ||
| + | |||
| + | https://unix.stackexchange.com/questions/42277/linux-repairing-bad-blocks-on-a-raid1-array-with-gpt | ||
| + | |||
| + | 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 | ||
| + | |||
| + | #!/bin/bash | ||
| + | |||
| + | save="$(tput sc)"; | ||
| + | clear="$(tput rc)$(tput el)"; | ||
| + | for sync in /sys/block/md*/md/sync_action; do | ||
| + | md="$(echo "$sync" | cut -d/ -f4)" | ||
| + | cmpl="/sys/block/$md/md/sync_completed" | ||
| + | |||
| + | # check current state and get it repairing. | ||
| + | read current < "$sync" | ||
| + | case "$current" in | ||
| + | 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 | ||
| + | |||
| + | echo -n "Repair $md...$save" >&2 | ||
| + | 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 | ||
| + | |||
| + | unused devices: <none> | ||
