Em 5/5/2010 01:27, Nenhum_de_Nos escreveu:
>
> Renato,
>
> salvo engano, raidz no zfs num faz o mesmo que Raid5 ? (seria somente um
> apelido do zfs) (naõ achei página falando agora, num procurei tanto tb :)
>
>
Da man page do zpool
raidz A variation on RAID-5 that allows for better distribution of
raidz1 parity and eliminates the "RAID-5 write hole" (in which data
raidz2 and parity become inconsistent after a power loss). Data and
parity is striped across all disks within a raidz group.
A raidz group can have either single- or double-parity,
mean-
ing that the raidz group can sustain one or two
failures
respectively without losing any data. The raidz1
vdev type
specifies a single-parity raidz group and the
raidz2 vdev
type specifies a double-parity raidz group. The
raidz vdev
type is an alias for raidz1.
A raidz group with N disks of size X with P parity
disks can
hold approximately (N-P)*X bytes and can
withstand P
device(s) failing before data integrity is
compromised. The
minimum number of devices in a raidz group is one
more than
the number of parity disks. The recommended number is
between
3 and 9 to help increase performance.
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