Date: Mon, 29 Oct 2007 22:06:29 +0100 From: Ulf Lilleengen <lulf@stud.ntnu.no> To: Felipe Neuwald <felipe@neuwald.biz> Cc: freebsd-geom@freebsd.org Subject: Re: Raid 0 + 1 Message-ID: <20071029210629.GA26364@carrot.studby.ntnu.no> In-Reply-To: <47260370.3060004@neuwald.biz> References: <47260370.3060004@neuwald.biz>
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On Mon, Oct 29, 2007 at 01:59:44PM -0200, Felipe Neuwald wrote: > Hi Folks, > > I talked with my customer, and we decided to implement a 0 + 1 RAID, > with 4 disks of 250Gb each. > > Here is how my RAID is working now: > > [root@fileserver /]# gvinum list > 4 drives: > D a State: up /dev/ad4 A: 0/238474 MB (0%) > D b State: up /dev/ad5 A: 0/238475 MB (0%) > D c State: up /dev/ad6 A: 0/238475 MB (0%) > D d State: up /dev/ad7 A: 0/238475 MB (0%) > > 1 volume: > V data State: up Plexes: 1 Size: 931 GB > > 1 plex: > P data.p0 S State: up Subdisks: 4 Size: 931 GB > > 4 subdisks: > S data.p0.s0 State: up D: a Size: 232 GB > S data.p0.s1 State: up D: b Size: 232 GB > S data.p0.s2 State: up D: c Size: 232 GB > S data.p0.s3 State: up D: d Size: 232 GB > > > Could someone give me on example of how I'll implement a 0 + 1 RAID? > Hello, You need to create two plexes to do this, so something like: drive a device /dev/ad4 drive b device /dev/ad5 drive c device /dev/ad6 drive d device /dev/ad7 volume data plex org striped 493k # or some other stripesize sd drive a sd drive b plex org striped 493k sd drive c sd drive d Should do the trick. Also note that you can use a combination of gstripe(8) and gmirror(8) to achieve the same effect. -- Ulf Lilleengen
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