Re: Accessing SCSI-Devices >2TB

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_at_bwct.de                                  info_at_bwct.de