ZFS disk magic?
15/12/2017 14:54
Hi, Is the order of disk on a ZFS pool significant or will that also(as the rest of ZFS) by magic get resolved by the ZFS drivers? I meam, if I unplug a numbers of disks from a JBOD and reinstall them in a diffenet order will the FS still work? /michael

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15/12/2017 14:54 - On Mon, 22 Sep 2008 23:42:44 +0200, I waved a wand and this message magically appears in front of Michael Laajanen: Not really, Linux has been doing that for years with their md block devices. You can yank the drives out, put them back in any order you like and it'll still get reassembled properly. -- http://www.munted.org.uk Fearsome grindings.


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15/12/2017 14:54 - Hi, Laurent Blume wrote: That is one of the few times I as a HW Designer are impressed of SW guys ;) cheers Michael

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15/12/2017 14:54 - Michael Laajanen wrote: Make a backup BEFORE YOU TRY IT!!!!!!!! You have been WARNED!!!!!!!!!!!!!!!!!!!

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15/12/2017 14:54 - Hi, Richard B. Gilbert wrote: But should it work? /michael

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15/12/2017 14:54 - Michael Laajanen a écrit : Yes, actually, if you install them in the same system, you won't even notice a difference. On another system, you will only need to import it, as you would with any zpool.

Magic.

Actually, Sun people have been showing that off often in shows, doing a ZFS pool out of a handful of USB thumb drives, then mixing them and plugging them back: zpool still there.

Laurent

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15/12/2017 14:54 - That also works since some version of SVM/LVM.

It used to be a mess if the device tree for some reason was rebuilt, but isn't anymore if the filesystems use metadevices.


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