mirror of
https://github.com/Erreur32/cheat.git
synced 2024-11-01 05:21:06 +01:00
59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
# For the sake of briefness, we use Bash "group compound" stanza:
|
|
# /dev/sd{a,b,...}1 => /dev/sda1 /dev/sdb1 ...
|
|
# Along the following variables:
|
|
# ${M} array identifier (/dev/md${M})
|
|
# ${D} device identifier (/dev/sd${D})
|
|
# ${P} partition identifier (/dev/sd${D}${P})
|
|
|
|
# Create (initialize) a new array
|
|
mdadm --create /dev/md${M} --level=raid5 --raid-devices=4 /dev/sd{a,b,c,d,e}${P} --spare-devices=/dev/sdf1
|
|
|
|
# Manually assemble (activate) an existing array
|
|
mdadm --assemble /dev/md${M} /dev/sd{a,b,c,d,e}${P}
|
|
|
|
# Automatically assemble (activate) all existing arrays
|
|
mdadm --assemble --scan
|
|
|
|
# Stop an assembled (active) array
|
|
mdadm --stop /dev/md${M}
|
|
|
|
# See array configuration
|
|
mdadm --query /dev/md${M}
|
|
|
|
# See array component configuration (dump superblock content)
|
|
mdadm --query --examine /dev/sd${D}${P}
|
|
|
|
# See detailed array confiration/status
|
|
mdadm --detail /dev/md${M}
|
|
|
|
# Save existing arrays configuration
|
|
# (MAY be required by initrd for successfull boot)
|
|
mdadm --detail --scan > /etc/mdadm/mdadm.conf
|
|
|
|
# Erase array component superblock
|
|
# (MUST do before reusing a partition for other purposes)
|
|
mdadm --zero-superblock /dev/sd${D}${P}
|
|
|
|
# Manually mark a component as failed
|
|
# (SHOULD when a device shows wear-and-tear signs, e.g. through SMART)
|
|
mdadm --manage /dev/md${M} --fail /dev/sd${D}${P}
|
|
|
|
# Remove a failed component
|
|
# (SHOULD before preemptively replacing a device, after failing it)
|
|
mdadm --manage /dev/md${M} --remove /dev/sd${D}${P}
|
|
|
|
# Prepare (format) a new device to replace a failed one
|
|
sfdisk -d /dev/sd${D,sane} | sfdisk /dev/sd${D,new}
|
|
|
|
# Add new component to an existing array
|
|
# (this will trigger the rebuild)
|
|
mdadm --manage /dev/md${M} --add /dev/sd${D,new}${P}
|
|
|
|
# See assembled (active) arrays status
|
|
cat /proc/mdstat
|
|
|
|
# Rename a device
|
|
# (SHOULD after hostname change; eg. name="$(hostname -s)")
|
|
mdadm --assemble /dev/md${M} /dev/sd{a,b,c,d,e}${P} --name="${name}:${M}" --update=name
|
|
|