Date: Tue, 7 Nov 2017 15:30:46 -0800 From: Mel Pilgrim <list_freebsd@bluerosetech.com> To: "freebsd-questions@FreeBSD.org" <freebsd-questions@freebsd.org> Subject: Migrating from raidz2 to mirror Message-ID: <0b2c709d-3c71-67f9-5af8-5062b0cf857f@bluerosetech.com>
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I currently have this raidz2 configuration:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
gpt/zfsd0 ONLINE 0 0 0
gpt/zfsd1 ONLINE 0 0 0
gpt/zfsd2 ONLINE 0 0 0
gpt/zfsd3 ONLINE 0 0 0
I want to switch to a mirror configuration on new disks. My first
thought was to add the disks to tank as mirrors of the existing raidz2
plex and use resilvering to transfer everything without downtime. The
man page section for the zpool attach command says the existing device
"cannot be a part of raidz configuration", but I'm not sure what "part
of" means here. Does that mean only that I can't attach a mirror to any
of the individual members of the raidz2 plex (the gpt/zfsd* shown above)
or does that include the "raidz2-0" vdev?
In other words, is it possible to attach a single disk as a mirror of
raidz2-0?
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