Date: Wed, 13 Dec 2006 10:45:14 +0100 From: "Olivier Cochard-Labbe" <olivier@freenas.org> To: "Ulf Lilleengen" <lulf@stud.ntnu.no> Cc: freebsd-geom@freebsd.org Subject: Re: geom raid5 module Message-ID: <3131aa530612130145l77ebb6f6ga7d4ac54716b5cc0@mail.gmail.com> In-Reply-To: <20061211164844.GA3827@vimes.studby.ntnu.no> References: <3131aa530612110522y7b8ccad5k9d5735277b4d5ffa@mail.gmail.com> <20061211164844.GA3827@vimes.studby.ntnu.no>
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2006/12/11, Ulf Lilleengen <lulf@stud.ntnu.no>: > However I am interested to hear of your problems with gvinum raid5. Is it= just > stability-problems or any spesific bugs you encounter? > Hi Ulf, Here is, for example, the first problem problem with geom vinum RAID5: I have 4 disks: - ad0: 203MB - ad1: 101MB - ad2: 306MB - ad3: 101MB If I create a raid 5 volume with these disk, can you confirme that the theorical size should be 300MB (4 disks of the smallest drive: 100MB) ? It's the size given with graid5 and with RAID caclulator (http://dorm.tunkeymicket.com/raidcalc/). But with geom vinum I obtain a 611MB disk: $ /sbin/gvinum list 4 drives: D disk_da3 State: up=09/dev/da3s1a=09A: 0/101 MB (0%) D disk_da2 State: up=09/dev/da2s1a=09A: 0/306 MB (0%) D disk_da1 State: up=09/dev/da1s1a=09A: 0/101 MB (0%) D disk_da0 State: up=09/dev/da0s1a=09A: 0/203 MB (0%) 1 volume: V raid5 State: up=09Plexes: 1=09Size: 611 MB 1 plex: P raid5.p0 R5 State: up=09Subdisks: 4=09Size: 611 MB 4 subdisks: S raid5.p0.s3 State: up=09D: disk_da3 Size: 101 MB S raid5.p0.s2 State: up=09D: disk_da2 Size: 306 MB S raid5.p0.s1 State: up=09D: disk_da1 Size: 101 MB S raid5.p0.s0 State: up=09D: disk_da0 Size: 203 MB For the second problem, you can found it on the mailing list archive: http://lists.freebsd.org/pipermail/freebsd-geom/2006-March/001114.html (I don't test with FreeBSD 6.2 prerelease, if I still have this second prob= lem) Regards, Olivier --=20 Olivier Cochard-Labb=E9 FreeNAS main developer http://www.freenas.org Skype: callto://ocochard
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