Date: Thu, 11 Jan 2007 23:02:41 -0500 (EST) From: Charles Sprickman <spork@bway.net> To: Jan Mikkelsen <janm@transactionware.com> Cc: Jo Rhett <jrhett@svcolo.com>, freebsd-stable@freebsd.org Subject: Re: 2.4TB disk - MBR and GPT coexist? Message-ID: <Pine.OSX.4.64.0701112302140.13775@white.nat.fasttrackmonkey.com> In-Reply-To: <000901c735fc$d180ac10$3301a8c0@janmxp> References: <45A5FD8A.6080409@svcolo.com><2918081F-D376-410B-B6FD-42BDD3323575@svcolo.com><20070111213444.GB17185@zone3000.net><D0D0CE06-B991-4945-B12B-152BA930106B@svcolo.com><20070112005510.2e145462.torfinn.ingolfsen@broadpark.no> <669E8D5D-E286-42DC-800F-24D7DDB2469F@svcolo.com> <000901c735fc$d180ac10$3301a8c0@janmxp>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 12 Jan 2007, Jan Mikkelsen wrote: > Hi, > > Jo Rhett wrote: >>> On Thu, 11 Jan 2007 13:56:43 -0800 Jo Rhett <jrhett@svcolo.com> wrote: >>>> Thanks for the reply. The problem is that I have a single 6-drive >>>> (550gb/ea) RAID-5 array. If I split two disks off to make a RAID-1 >>>> boot device, I'll lose 1TB of usable storage. >> >> On Jan 11, 2007, at 3:55 PM, Torfinn Ingolfsen wrote: >>> Hmm, why can't you just make your controller create two logical arrays >>> onto the one physical array? Doesnt the controller support this feature? >> >> Not any one that I've ever seen in commodity disks. Yes, on big fiber >> channel disk cabinets. No to 6-8 drive raid controllers. > > I'd be very surprised if you can't. You can certainly do it with Areca > (arcmsr(4)), HP (ciss(4)), IBM ServeRAID (ips(4)), although the details vary. I can confirm 3Ware controllers also work that way. Charles > For example, on an Areca 8 port controller, I have 8 disks in a RAID-6 array, > and within that "RAID set", I have three volumes. The three volumes appear > to FreeBSD as da0, da1 and da2, respectively. > > CLI> rsf info > Num Name Disks TotalCap FreeCap DiskChannels State > =============================================================================== > 1 Raid Set # 00 8 2560.0GB 0.0GB 12345678 Rebuilding > =============================================================================== > GuiErrMsg<0x00>: Success. > > CLI> vsf info > # Name Raid# Level Capacity Ch/Id/Lun State > =============================================================================== > 1 ARC-1220-VOL#00 1 Raid6 81.0GB 00/00/00 Rebuilding(63.8%) > 2 ARC-1220-VOL#01 1 Raid6 1000.0GB 00/01/00 Need Rebuild > 3 ARC-1220-VOL#02 1 Raid6 839.0GB 00/02/00 Need Rebuild > =============================================================================== > GuiErrMsg<0x00>: Success. > > > Regards, > > Jan Mikkelsen > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.OSX.4.64.0701112302140.13775>