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--- mdadm [2019/05/05 23:50]
0.0.0.0 vytvořeno
+++ mdadm [2020/05/12 02:44]
simandl
@@ Řádek 35: / Řádek 35: @@
 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=
+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>

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