Accessing SCSI-Devices >2TB
Bernd Walter
ticso at cicely12.cicely.de
Wed Jun 8 14:25:15 GMT 2005
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
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