Assuming I have a zpool which consists of a simple 2 disk mirror. How do I attach a third disk (disk3) to this zpool to mirror the existing data? Then split this mirror and remove disk0 and disk1, leaving a single disk zpool which consist of the new disk3. AKA. Online data migration.
[root]# zpool status -v pool: apps state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM apps ONLINE 0 0 0 mirror ONLINE 0 0 0 /root/zfs/disk0 ONLINE 0 0 0 /root/zfs/disk1 ONLINE 0 0 0 errors: No known data errors The use case here is, we've implemented new Storage. The new (3rd) LUN is a RAID10 Hitachi SAN with the existing mirror being local SAS Disks. Back in the VxVM world, this would be done by mirroring the dg then splitting the mirror. I understand we are moving away from a ZFS mirror to a single stripe. Thanks
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