2011-07-16 20:42, Edward Ned Harvey пишет:
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Jim Klimov
Well, in terms of mirroring over stripes, if any component of any
stripe
breaks,
the whole half of the mirror is degraded. If another drive from another
half
also breaks, you're in trouble.
There's no such thing in ZFS. You have a series of mirrors in the pool, and
if one side of one mirror breaks, no big deal. If another side of another
mirror breaks, no big deal. The only problem is when you lose both sides of
a single mirror.
Now please, nobody say this is either raid10 or raid01. Because it's
neither one.
Well, I do stand corrected in case of a standard ZFS layout
which would automatically make the zfs-striping over mirrors
of identical disks and not vice-versa.
As a lame defense for myself, I can say that the dangers
described apply to the case that, if the OP were so inclined,
he could craft a couple of "striped" pools (300+500) and
then make a ZFS pool over these two. But yes, it would
take some effort and determination to make such an ugly
construct in the first place ;)
//Jim
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