Using GTP and glabel for ZFS arrays
Dan Langille
dan at langille.org
Sat Jul 24 13:01:28 UTC 2010
On 7/24/2010 7:56 AM, Pawel Tyll wrote:
>> Easiest way to create sparse eg 20 GB assuming test.img doesn't exist
>> already
You trim posts too much... there is no way to compare without opening
another email.
Adam wrote:
> truncate -s 20g test.img
> ls -sk test.img
> 1 test.img
> No no no. Easiest way to do what you want to do:
> mdconfig -a -t malloc -s 3t -u 0
> mdconfig -a -t malloc -s 3t -u 1
In what way is that easier? Now I have /dev/md0 and /dev/md1 as opposed
to two sparse files.
> Just make sure to offline and delete mds ASAP, unless you have 6TB of
> RAM waiting to be filled ;) - note that with RAIDZ2 you have no
> redundancy with two fake disks gone, and if going with RAIDZ1 this
> won't work at all. I can't figure out a safe way (data redundancy all
> the way) of doing things with only 2 free disks and 3.5TB data - third
> disk would make things easier, fourth would make them trivial; note
> that temporary disks 3 and 4 don't have to be 2TB, 1.5TB will do.
The lack of redundancy is noted and accepted. Thanks. :)
--
Dan Langille - http://langille.org/
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