ZEVO related system hang

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Re: ZEVO related system hang

Post by pbeyersdorf » Fri Nov 23, 2012 5:44 pm

Thanks,

I agree, I also expect the workaround should work with ZFS as well as HFS+, I only wish I had come up with the workaround before rebuilding the disk array in HFS+. I expect to switch back to ZFS if and when I ever have to rebuild this backup set.
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workarounds to problems with spin

Post by grahamperrin » Sat Nov 24, 2012 1:45 am

OK. With or without ZFS you might experiment with ways of locally tickling the external TowerRAID enclosure, or its drives, just often enough to prevent the problem with spin. Ways that do allow the Mac's well-behaving internal disk(s) to spin down.

Something like –

Code: Select all
mdutil -s /Volumes/TowerRAID


– as a system-wide daemon in
/Library/LaunchDaemons

----

More generally, the blanket workaround (disallowing sleep for all hard disks) might make a good point within a troubleshooting flowchart …
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