HDD-manufacture induced ZFS limitations

[Tom Samplonius]

On Nov 3, 2013, at 1:07 AM, Zenny <garbytrash at gmail.com> wrote:

> Hi:
> 
> PROBLEM
> 
> I came across a very weird situation because HDD-manufacturer counts
> HDD space according to metric system instead of multiplication of 1024

  That is not weird or unusual.  For example, 72GB disks range from 72GB to 73.1GB (or so) in size.  It doesn't really have anything to do with the 1024 vs 1000 measurement issue.  Manufacturing variations result in a lot of different sizes.

  Major commercial storage vendors automatically round down to the nearest known increment.  This worked well for SCSI disks, as they always doubled in size each generation (9, 18, 36, 72, 144, etc.).  It doesn't work as well with SATA disks.

  Or down to the nearest whole GB, if it is not a known size.



Tom