xrun_detected

@xrun_detected@programming.dev

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xrun_detected ,

I've recently done this on one of my machines, these were the steps I as far as i remember:

  • backup!
  • add the new disks to the machine
  • partition them like the smaller disks
  • add the new disks to the array(s) (as members, not just spares)
  • take care of bootloader things while the raid is syncing
  • your raid should have 4 devices in sync now
  • fail and remove the smaller disks from the raid one by one
  • resize the partitions on the bigger disks to maximum
  • grow the MD raid to the new size

If you use luks and/or lvm some additional steps will be needed to grow them as well.

If your system can hotplug disks there's a chance to pull this off with little to no downtime. :)

xrun_detected ,

I can't really tell you what to use, but from my personal experience - stay away from glusterfs and drbd. both have caused me serious trouble when trying to run them in a production setup. ceph seems to be pretty solid, though.

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