Re: zfs: df and zpool list report different size

On 4/26/07, Ståle Kristoffersen <staalebk@xxxxxxxxxx> wrote:
On 2007-04-26 at 16:36, Ollivier Robert wrote:
> According to Alexandre Biancalana:
> > # zpool create backup raidz ad9 ad11
>
> Note, raidz with two disks is almost the same as a mirror so the real,
> usable space is half. In raidz, if you have N disks, the total usable
> capacity is N-1.

Well, that would have been fine if it did the same thing with a mirror, but
thats not the case:


# zpool create test raidz ad1 ad2 ad3
# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
test 1.48G 773M 747M 50% ONLINE -
# df -ht zfs
Filesystem Size Used Avail Capacity Mounted on
test 980M 32K 980M 0% /test

# zpool destroy test
# zpool create test mirror ad1 ad2
# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
test 504M 88K 504M 0% ONLINE -
# df -ht zfs
Filesystem Size Used Avail Capacity Mounted on
test 472M 32K 472M 0% /test


Try creating the raidz with 2 disks like Alexandre did...

--
Joao Barros
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