Am 27.04.2017 um 16:25 schrieb John Stoffel:
Ron> We run a 2TB fileserver in a raid1 configuration. Today one of
Ron> the 2 disks (/dev/sdb) failed and we've just replaced it and set
Ron> up exactly the same partitions as the working, but degraded, raid
Ron> has on /dev/sda.
First off, why are you bothering to do this? You should just mirror
the entire disk with MD
because he has partitions in use and more than on mdraid as you can see
in the /proc/mdstat output? because he just want to replace a disk?
becaus ehe likjely has also the operating system on one of that many
RAIDs sharing the same disks?
then build LVM volumes on top of that
he is replacing a disk in a already existing RAID and has more than on
RAID volume
you can then allocate as you see fit, moving your data around,
growing, shrinking volumes as you need
he is replacing a disk in a already existing RAID and has more than on
RAID volume
[root@rh:~]$ df
Filesystem Type Size Used Avail Use% Mounted on
/dev/md1 ext4 29G 6.8G 22G 24% /
/dev/md0 ext4 485M 34M 448M 7% /boot
/dev/md2 ext4 3.6T 678G 2.9T 19% /mnt/data
[root@rh:~]$ cat /proc/mdstat
Personalities : [raid10] [raid1]
md0 : active raid1 sda1[0] sdc1[1] sdb1[3] sdd1[2]
511988 blocks super 1.0 [4/4] [UUUU]
md1 : active raid10 sda2[0] sdc2[1] sdd2[2] sdb2[3]
30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU]
md2 : active raid10 sda3[0] sdc3[1] sdd3[2] sdb3[3]
3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU]
[========>............] check = 44.4% (1721204032/3875222528)
finish=470.9min speed=76232K/sec
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