Need to worry about 1 + 2 cksum errors?

All your general support questions for OpenZFS on OS X.

Need to worry about 1 + 2 cksum errors?

Postby nekton34 » Sat Nov 28, 2015 10:49 pm

A couple of the disks in master raidz pool that took 11 hours of "drain fixing" last weekend are now showing 2 cksum errors on one disk and 1 cksum error on another. Is this anything to worry about? Is running a manual scrub worthwhile doing—there are no read or write errors?

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nekton34
 
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Re: Need to worry about 1 + 2 cksum errors?

Postby haer22 » Sun Nov 29, 2015 12:40 pm

occasional checksum errors are "ok". I usually find them nice to have as it supports my decision to use zfs.

Just do
Code: Select all
zpool clear master


If it starts to happen often, you should consider replacing that disk.

Scrubbing should be done 1-2 times a month. Recommendations vary. Myself I scrub every Saturday night. If you get that "funny feeling" do a scrub. The wear and tear on the discs are minuscule compared to the wear and tear on your mind worrying over your data.
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