On 9/1/06, Tim Cook <[EMAIL PROTECTED]> wrote:
Ok, so here's my "situation" that I may or may not run into in the future.
Currently I have 3x120GB PATA drives in a RAID-Z as part of my zfs pool. I
plan on adding 2x320GB SATA drives in the immediate future to the same pool as
a raid-1. Here's where it gets tricky. In the future, in a perfect world, I'd
like to pick up a third 320GB SATA drive to make a RAID-Z out of those as well.
So what would be the outcome of the following two scenarios:
the best solution is to put the 3rd 320GB drive on a credit card and
get all 3 at once, then you don't have the headache.
or wait long enough and they may have the utility to resise raidz
pools. the other option would be if they would implement a 3 disk
raidz pool with one drive degraded. then you could break the mirror,
make the 3 disk raidz pool running in degraded mode. then copy data
over, and then add the 3rd disk to the pool. perhaps that would be a
good RFE "create a raidz with N-1 disks so it runs in degraded mode"
to cope with solutions like these.
James Dickens
uadmin.blogspot.com
1. I have the pool as it stands, but it's taking up less space than the total
free space on the initial PATA RAID-Z. I remove the RAID-1 SATA, make a RAID-Z
out of them, and then re-add them to the pool. Can I do this without losing
any data? Assuming some is striped across the RAID-1, can it recover
gracefully?
2. I have the pool as it stands, but it's taking up MORE space than the total free on the
initial PATA RAID-Z. I remove the RAID-1 again, to make a RAID-Z. What's going to happen
to that data that is > the RAID-Z can store? Do I lose data? Does it tell me no way,
and not allow me to remove the RAID-1 from the pool without a big "idiot you're about
to lose all your data" message?
If there's anything that doesn't make sense, please let me know and I'll try to
clarify.
Thanks,
Tim
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