How to add more physical disks to a mirror vdev (to increase redundancy)?

Question

Can more physical drives be added to mirror vdevs after a zpool has been created?

For example, if a zpool is created using:

zpool create test_pool mirror /dev/sd0 /dev/sd1 mirror /dev/sd2 /dev/sd3

Can more drives be added to the vdevs to increase their redundancy? That is, can the number of mirrored drives be increased from 1 to 2?

ewwhite · Accepted Answer · 2017-04-13T15:45:33.947

11

Yes. Yes they can.

Something like the following would add to an existing mirror and yield a triple-mirror, given the example above:

zpool attach test_pool /dev/sd0 /dev/sd4
zpool attach test_pool /dev/sd2 /dev/sd5

edited Apr 13 '17 at 15:45

answered Apr 13 '17 at 15:29

ewwhite

1 Answers1