Date: Wed, 8 Jun 2005 17:02:51 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: "Raphael H. Becker" <rabe@p-i-n.com> Cc: freebsd-current@freebsd.org, Eric Anderson <anderson@centtech.com> Subject: Re: Accessing SCSI-Devices >2TB Message-ID: <20050608150251.GQ95969@cicely12.cicely.de> In-Reply-To: <20050608160837.E41471@p-i-n.com> References: <20050608122324.C41471@p-i-n.com> <42A6D850.2070603@centtech.com> <20050608160837.E41471@p-i-n.com>
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On Wed, Jun 08, 2005 at 04:08:37PM +0200, Raphael H. Becker wrote: > On Wed, Jun 08, 2005 at 06:36:48AM -0500, Eric Anderson wrote: > > Raphael H. Becker wrote: > > > I tried to attach our new external RAID to my RENEG_5_4 box today using > > > one logical drive of about 2326GB. > > > > > > The RAID was preconfigured with two 50% partitions which were assigned > > > to two LUNs. FreeBSD 5.4 was able to detect those as da1 and da2 with > > > full capacity. > > I used plan b (see below) and reverted back to 2 LUNs each mapped to one > partition of the logical drive. > > After the RAID-initialisation (it does some background-init) I was able > to get those drives as da1 and da2 using "camcontrol rescan ...": > > da1 at ahc1 bus 0 target 0 lun 0 > da1: <IFT A12U-G2421 342D> Fixed Direct Access SCSI-3 device > da1: 160.000MB/s transfers (80.000MHz, offset 127, 16bit), Tagged Queueing Enabled > da1: 1310177MB (2683242496 512 byte sectors: 255H 63S/T 167024C) > da2 at ahc1 bus 0 target 0 lun 1 > da2: <IFT A12U-G2421 342D> Fixed Direct Access SCSI-3 device > da2: 160.000MB/s transfers (80.000MHz, offset 127, 16bit), Tagged Queueing Enabled > da2: 1310177MB (2683242496 512 byte sectors: 255H 63S/T 167024C) > > Did a simple > > ccdconfig ccd0 64 none /dev/da1 /dev/da2 > > (Kernel with "device ccd") then to get a /dev/ccd0. Works. > > > > b) reverting to 2 Partitions and doing ccd(4) on the resulting /dev/da(1|2) > > This is what I did (using gvinum). > > How to get disklabel running with this? Use gpt to partition - which was already mention in this thread. disklabel won't do and since gpt was already widely accepted there was not reason to have a new disklabel. > # disklabel ccd0 > disklabel: disks with more than 2^32-1 sectors are not supported > > I'm afraid I need to use fdisk to split my ccd'ed RAID again to get two > smaller partitions. So, this is exactly what I've done in the > RAID controller: RAID'ing 12 Drives to a logical drive, split them up > into 2 Partitions and assigning two LUNs to get two drives for FreeBSD, > ccd'ing them to one drive and finally splitting it up into two > partitions using fdisk. :-/ > This would effectivly save me an fdisk and a ccd(4) and some trouble. > > Any idea, how to get 2620354MB in one filesystem (using the two ccd'ed > partitions of the RAID)? > > Well, I'm pretty trained in configuring that RAID now so if anyone knows > a solution, how to get rid of the 2TB-Limit for one drive (/dev/da1), > maybe using larger blocks of about 1k or 2k, I just need to configure > that RAID as a single large logical drive. There is no such limit. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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