Eric Schrock wrote:
On Sat, May 27, 2006 at 08:29:05AM +1000, grant beattie wrote:
On Fri, May 26, 2006 at 10:33:34AM -0700, Eric Schrock wrote:
RAID-Z is single-fault tolerant. If if you take out two disks, then you
no longer have the required redundancy to maintain your data. Build 42
should contain double-parity RAID-Z, which will allow you to sustain two
simulataneous disk failures without dataloss.
Eric,
is raidz double parity optional or mandatory?
optional. There will be a new vdev type, 'raidz2', which will be
double parity. Existing raid-z vdevs will become 'raidz1', and 'raidz'
will be kept as an alias for 'raidz1' for backwards compatibility.
This implies that the differences on disk are sufficient that the zpool
upgrade stuff wouldn't cut it. Right ? That is there was no way to turn
an existing raidz1 into a raidz2.
Is there a new version for this or is that not needed since it is at the
vdev layer ?
Just curious (mainly because I'm currently using version "3" for
zfs-crypto :-)).
I assume the on disk format document will be updated too.
--
Darren J Moffat
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