ZFS mismatched replication level

Question

I have a RAIDZ1 running 6x 3TB drives, and I want to expand my pool by adding 5x 2TB drives to it. But when I tell it to add to the pool I get this:

$ zpool add zpool1 raidz1 /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde
invalid vdev specification
use '-f' to override the following errors:
mismatched replication level: pool uses 6-way raidz and new vdev uses 5-way raidz

Just how bad is doing this? I don't care about performance, this server does not need massive performance, it needs storage. Will this damage my data to do this or is it fine to expand to different size pools like this?

score 0 · Answer 1 · answered Aug 05 '23 at 00:29

0

It's a bad idea. Is there a good reason you won't use appropriately sized drives?

Even in the realm of used disks, 3TB drives are very inexpensive, so I hope cost isn't the concern.

answered Aug 05 '23 at 00:29

ewwhite

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But why?? Its not complaining about drive sizes, if you read the error its complaining about 6 drives vs 5 drives in the vdev. – jfreak53 Aug 05 '23 at 00:46
Yes, that's a bad idea as well. – ewwhite Aug 05 '23 at 20:35

ZFS mismatched replication level

1 Answers1