Date: Wed, 8 Jun 2005 16:24:10 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: "Raphael H. Becker" <rabe@p-i-n.com> Cc: freebsd-current@freebsd.org, ticso@cicely.de Subject: Re: Accessing SCSI-Devices >2TB Message-ID: <20050608142409.GM95969@cicely12.cicely.de> In-Reply-To: <20050608161548.F41471@p-i-n.com> References: <20050608122324.C41471@p-i-n.com> <42A6D850.2070603@centtech.com> <20050608123953.GG95969@cicely12.cicely.de> <20050608154312.D41471@p-i-n.com> <20050608135229.GK95969@cicely12.cicely.de> <20050608161548.F41471@p-i-n.com>
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On Wed, Jun 08, 2005 at 04:15:48PM +0200, Raphael H. Becker wrote: > On Wed, Jun 08, 2005 at 03:52:30PM +0200, Bernd Walter wrote: > > On Wed, Jun 08, 2005 at 03:43:12PM +0200, Raphael H. Becker wrote: > > > On Wed, Jun 08, 2005 at 02:39:53PM +0200, Bernd Walter wrote: > > > > > revision 1.139 > > > > date: 2003/04/30 00:35:22; author: ken; state: Exp; lines: +194 -65 > > > > Add support to CAM for devices with more than 2^32 blocks. (2TB if you're > > > > using 512 byte blocks). > > > > > > So, what will i have to do to get lets say 1kb blocks? > > > > Use a drive that has 1kb blocks. > > I use 1k/sector mo-media since years. > > Sometimes HDDs can be reformated to 1k or even 2k blocks, but you > > likely won't win anything by doing this with modern drives. > > Why do you want to do this? > > Please tell me, if I got wrong here. For me > > "Add support to CAM for devices with more than 2^32 blocks. > (2TB if you're using 512 byte blocks)." > > sounds like > > "if you use double sized blocks you will have double-sized limit with > the same number of blocks." No - it means "more than 2^32 blocks is supported". The annotation below just tells what 2^32 is and what limitation there previously was. > And 1kb would extend the 2TB limit to 4TB, what would work for me here. Obviously, but that's not required - you can have SCSI disks with more than 2^32 512 Byte blocks since more than 2 years. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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