配置Linux軟RAID0

[[email?protected] ~]# mdadm -C -v /dev/md0 -l 0 -n 2 /dev/sdb /dev/sdc

[[email?protected] ~]# mdadm -C -v /dev/md0 -l 0 -n 2 /dev/sdb /dev/sdc

mdadm: chunk size defaults to 512K

mdadm: /dev/sdb appears to be part of a raid array:

level=raid0 devices=0 ctime=Thu Jan? 1 08:00:00 1970

mdadm: partition table exists on /dev/sdb but will be lost or

meaningless after creating array

Continue creating array? y

mdadm: Defaulting to version 1.2 metadata

mdadm: array /dev/md0 started.

ARRAY /dev/md0 metadata=1.2 name=RHEL7.2:0 UUID=cf8fac13:5d74d4da:d142582c:567b346b

[[email?protected] ~]# mdadm -Ds > /etc/mdadm.conf

[[email?protected] ~]# mdadm -D /dev/md0

/dev/md0:

Version : 1.2

Creation Time : Wed Aug 17 21:19:31 2016

Raid Level : raid0

Array Size : 10484736 (10.00 GiB 10.74 GB)

Raid Devices : 2

Total Devices : 2

Persistence : Superblock is persistent

Update Time : Wed Aug 17 21:19:31 2016

State : clean

Active Devices : 2

Working Devices : 2

Failed Devices : 0

Spare Devices : 0

Chunk Size : 512K

Name : RHEL7.2:0? (local to host RHEL7.2)

UUID : cf8fac13:5d74d4da:d142582c:567b346b

Events : 0

Number? ?Major? ?Minor? ?RaidDevice State

0? ? ? ?8? ? ? ?16? ? ? ? 0? ? ? active sync? ?/dev/sdb

1? ? ? ?8? ? ? ?32? ? ? ? 1? ? ? active sync? ?/dev/sdc

[[email?protected] ~]# mkfs -t xfs -f /dev/md0

log stripe unit (524288 bytes) is too large (maximum is 256KiB)

log stripe unit adjusted to 32KiB

meta-data=/dev/md0? ? ? ? ? ? ? ?isize=256? ? agcount=16, agsize=163712 blks

=? ? ? ? ? ? ? ? ? ? ? ?sectsz=512? ?attr=2, projid32bit=1

=? ? ? ? ? ? ? ? ? ? ? ?crc=0

data? ? ?=? ? ? ? ? ? ? ? ? ? ? ?bsize=4096? ?blocks=2619392, imaxpct=25

=? ? ? ? ? ? ? ? ? ? ? ?sunit=128? ? swidth=256 blks

naming? ?=version 2? ? ? ? ? ? ? bsize=4096? ?ascii-ci=0 ftype=0

log? ? ? =internal log? ? ? ? ? ?bsize=4096? ?blocks=2560, version=2

=? ? ? ? ? ? ? ? ? ? ? ?sectsz=512? ?sunit=8 blks, lazy-count=1

realtime =none? ? ? ? ? ? ? ? ? ?extsz=4096? ?blocks=0, rtextents=0

[[email?protected] ~]# mount /dev/mp0 /raid0

[[email?protected] ~]# vim /etc/fstab

/dev/md0? ? ? ? /raid0? defaults 0 0

Filesystem? ? ? ? ? ? ?Size? Used Avail Use% Mounted on

/dev/mapper/rhel-root? 9.8G? 3.3G? 6.5G? 34% /

devtmpfs? ? ? ? ? ? ? ?908M? ? ?0? 908M? ?0% /dev

tmpfs? ? ? ? ? ? ? ? ? 914M? ?80K? 914M? ?1% /dev/shm

tmpfs? ? ? ? ? ? ? ? ? 914M? 8.9M? 905M? ?1% /run

tmpfs? ? ? ? ? ? ? ? ? 914M? ? ?0? 914M? ?0% /sys/fs/cgroup

/dev/sda1? ? ? ? ? ? ? 197M? ?91M? 106M? 47% /boot

/dev/md0? ? ? ? ? ? ? ? 10G? ?33M? ?10G? ?1% /raid0

查看目錄容量

[[email?protected] ~]# du -sh /raid0

0? ? /raid0

[[email?protected] ~]# mdadm -r /dev/md0 /dev/sdc

mdadm: hot remove failed for /dev/sdc: Device or resource busy

[[email?protected] ~]# cat /proc/mdstat

Personalities : [raid0]

md0 : active raid0 sdc[1] sdb[0]

10484736 blocks super 1.2 512k chunks

unused devices:

/dev/md0: UUID="20fefde8-3544-436a-9d48-28ce3863539e" TYPE="xfs"

原文：http://andyliu.blog.51cto.com/518879/1839711

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