Re: PATCH: Support tera byte disk

[Andreas Dilger]

On Sep 18, 2002  13:11 -0700, H. J. Lu wrote:
> For a 1.8TB SCSI HD, kernel reports:
> 
> SCSI device sda: -773086208 512-byte hdwr sectors (-395819 MB)
> 
> Here is a patch to fix it. BTW, I don't think it will work with > 2TB,
> which requires bigger changes.

There's also a limit where statfs() overflows at 16TB for 4kB block
filesystems...  Ask me how I noticed this ;-)

Luckily, it is easy to upshift f_blksz and downshift f_blocks, f_bfree,
and f_bavail to get the data through the statfs interface, and df does
the reverse on the other side.  It makes sense to show a larger block
size anyways, so apps potentially do larger I/O requests.

Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/