Avoid using the last GiB on a disk

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Avoid using the last GiB on a disk

Post by si-ghan-bi » Mon Oct 08, 2012 2:47 pm

I read that different "same sized" HDs actually are different and this makes the replacement difficult: a solution is to buy a spare disk since the beginning.
Is it possible to pass to ZFS the whole disk but also to tell it to avoid using the last GiB to avoid such issue?
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Re: Avoid using the last GiB on a disk

Post by grahamperrin » Mon Oct 08, 2012 3:08 pm

Off-topic from installation … 

si-ghan-bi wrote:… Is it possible to pass to ZFS the whole disk but also to tell it to avoid using the last GiB  …?


I doubt it.

If you'd like part of a disk to be not given to ZFS: I guess, the answer is to first partition the disk, then give a part (not the whole).
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Re: Avoid using the last GiB on a disk

Post by si-ghan-bi » Mon Oct 08, 2012 3:16 pm

But then you incur in the slowdowns...
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Re: Avoid using the last GiB on a disk

Post by grahamperrin » Mon Oct 08, 2012 10:10 pm

… the slowdowns...


Please, which do you mean? These symptoms with a RAID-Z configuration?
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Re: Avoid using the last GiB on a disk

Post by si-ghan-bi » Tue Oct 09, 2012 2:35 am

And the ones reported in the page linked:
http://oceansidecoding.wordpress.com/20 ... -analysis/
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