RAID Partitionning

Dans le cas d-une partition

fdisk -l

parted /dev/sdc

mkfs.xfs /dev/sdc1

vim /etc/fstab

add this in /etc/fstab

/dev/sdc1               /export/backup                 xfs     defaults        1 2
mount -a

Dans le cas de deux raids controllers que l-on veut merger :

First I made sure that both partitions have the same size. /dev/sdc is
100Gig larger then /dev/sdb.

[root@server ~]# parted /dev/sdb
(parted) p
Number  Start   End     Size    File system  Name     Flags
 1      17.4kB  5900GB  5900GB               primary  raid

[root@server ~]# parted /dev/sdc
(parted) p
Number  Start   End     Size    File system  Name  Flags
 1      17.4kB  6000GB  6000GB  xfs
(parted) rm 1
(parted) mkpart
Partition name?  []?
File system type?  [ext2]?
Start? 1
End? 5900GB
(parted) p
Number  Start   End     Size    File system  Name  Flags
 1      17.4kB  5900GB  5900GB  xfs
(parted) q

As a second step I created a software RAID0 using mdadm:

[root@server ~]# mdadm --create /dev/md0 -n 2 -l 0 /dev/sdb1 /dev/sdc1

To check the RAID use a

[root@server ~]# cat /proc/mdstat
Personalities : [raid0]
md0 : active raid0 sdc1[1] sdb1[0]
      11523435776 blocks 64k chunks


This size of disk must be formatted using xfs, everything else isn't
capable of handling such large volumes:

[root@server ~]# mkfs.xfs /dev/md0

Finally I added the partition to the filesystem table and mounted it:

[root@server ~]# vi /etc/fstab
/dev/md0                /export/backup          xfs     defaults        1 2

[root@server ~]# mount -a
[root@server ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
...
/dev/md0               11T  5.1M   11T   1% /export/backup