On Fri, 5 Jul 2013, Tudor Holton wrote:

These are from the same manufacturer!  Interestingly, the larger drive is 
actually the older one!

I checked my drives, and all my 2TB drives are:

User Capacity:    2 000 398 934 016 bytes [2,00 TB]

Is the "standardization" not a fixed value but a minimum?  If so, what 
is that actual minimum?  If it's an actual 2 terabyte (2x10^12), then I 
suppose they're both technically over, but that means that we can't just 
simply create partitions that fill the space and expect to be able to 
transfer them later. :-(

Are you sure smartctl actually reads from the drive and doesn't query the 
controller? Only thing I can think of is that sdc sits on a controller 
that puts in a superblock between the OS and the drive, and thus truncates 
the size you can use.

2000397852160-2000398934016
-1081856
1081856/4096
264.125

However, it's a really odd size difference.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se