Linux RAID,LVM

MDADM: User space management tool that makes any block device raid

Modal commands

Create command

-C

Dedicated options

-L: Level

-N #: Number of devices

-A {Yes|no}: whether to automatically create a device file for it

-c:chunk size, 2^n, default is 64K

-X #: Specify the number of free disks

Management mode

-add,-remove,--fail

mdadm/dev/md#--fail/dev/sda#

Monitoring mode

-F

Growth model

-G

Equipment mode

-A

View details of a RAID array

Mdadm-d/dev/md#

--detail

Stop array

Mdadm-s/dev/md#

--stop

Watch: Periodically executes the specified command and displays the result in full screen

-N #: Specifies the period length in seconds and defaults to 2

Cat/proc/mdstat: Can view all enabled raid

Save current RAID information to a configuration file for later assembly

mdadm-d--scan >/etc/mdadm.conf

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Linux RAID,LVM