Is it possible to convert a striped mirror to a single mirror?

[Timothy Ha]

I had been running FreeNAS for a while, and I am running out of space. My current configuration is RAID10, and I want to add another mirror to my current volume with two relatively small disks, and later migrate back to RAID10.

CURRENT:

• VOL1
  • MIRROR
    • DISK1
    • DISK2
  • MIRROR
    • DISK3
    • DISK4

Want to temporarily expand by adding another mirror:

TEMP:

• VOL1
  • MIRROR
    • DISK1
    • DISK2
  • MIRROR
    • DISK3
    • DISK4
  • MIRROR
    • DISK5
    • DISK6

But later, after I purchase some higher capacity hard drives, I would want to migrate back to RAID10 or a single mirror. I was thinking about something like replacing two disks a mirror to ones with higher capacity, and somehow moving the data from the extraneous mirror(s) back onto the first two mirrors/single mirror, and remove the old drives from the volume.

Is this possible?

Thanks

 

[anodos]

I had been running FreeNAS for a while, and I am running out of space. My current configuration is RAID10, and I want to add another mirror to my current volume with two relatively small disks, and later migrate back to RAID10.

CURRENT:

• VOL1
  • MIRROR
    • DISK1
    • DISK2
  • MIRROR
    • DISK3
    • DISK4

Want to temporarily expand by adding another mirror:

TEMP:

• VOL1
  • MIRROR
    • DISK1
    • DISK2
  • MIRROR
    • DISK3
    • DISK4
  • MIRROR
    • DISK5
    • DISK6

But later, after I purchase some higher capacity hard drives, I would want to migrate back to RAID10 or a single mirror. I was thinking about something like replacing two disks a mirror to ones with higher capacity, and somehow moving the data from the extraneous mirror(s) back onto the first two mirrors/single mirror, and remove the old drives from the volume.

Is this possible?

Thanks

No. See here: https://forums.freenas.org/index.ph...ning-vdev-zpool-zil-and-l2arc-for-noobs.7775/

 

[Jailer]

When you add a 2 disk mirror you are creating a vdev of those 2 disks. When you add that vdev to your pool, the only way to undo that is to destroy your pool and start over.