David Bryan wrote:
Sorry if the question has been discussed before...did a pretty extensive
search, but no luck...
Preparing to build my first raidz pool. Plan to use 4 identical drives in a 3+1
configuration.
My question is -- what happens if one drive dies, and when I replace it, design
has changed slightly and the drive is (very slightly) different sized. Still a
1TB or what have you, but not identical. I'm guessing if it is slightly larger,
no problem, slightly smaller is trouble, but that isn't always obvious when you
buy a drive. My concern is that in a year when the drive blows, XYZ brand's
model 1000 will be replaced by XYZ model 1001 that formats to 1MB less (or
worse, I need to replace an XYZ brand 1TB with a similar 1TB ABC brand)
Is there a best practices suggestion here? Is this a real problem? Can I force
format the drives very slightly less than full capacity before adding them to
the pool to prevent such an issue?
Thanks.
I just integrated changes which addresses '6844090 zfs should be able to
mirror to a smaller disk'. This allows ZFS to deal with slightly
different sized devices as long as we can create the same number of
metaslabs. With this change you should be okay.
Thanks,
George
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