Date: Thu, 26 Apr 2007 16:49:17 +0200 From: =?iso-8859-1?Q?St=E5le?= Kristoffersen <staalebk@ifi.uio.no> To: freebsd-current@freebsd.org Subject: Re: zfs: df and zpool list report different size Message-ID: <20070426144917.GA20773@eschew.pusen.org> In-Reply-To: <20070426143637.GA74938@keltia.freenix.fr> References: <8e10486b0704260701w3a6ca86hb833de23849514df@mail.gmail.com> <20070426143637.GA74938@keltia.freenix.fr>
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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 -- Ståle Kristoffersen staalebk@ifi.uio.no
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