[linux-lvm] lsm space giveth and space taketh away: missing space?

Stuart D. Gathman stuart at bmsi.com
Thu Sep 2 03:52:02 UTC 2010

On Wed, 1 Sep 2010, Stuart D. Gathman wrote:

> 12.0 TeraBytes (12*10^12) ~= 10.91 TibiBytes (10.91*2^40) to 4 decimals.  The
> 3.15G was there, you added it to your LV (but you still need to resize the
> filesystem).  10.91*2^40 + 3.15*2^30 ~= 10.91*2^40 to 4 decimals.
> http://www.innumeracy.com/

I didn't mean to be quite so snarky.  It is a real problem that the storage
units (binary vs. decimal) are not consistently labeled in the various
utilities.  Blame it on disk manufacturers who started using decimal units
to inflate the apparent size of their drives in the eyes of naive buyers.
(But you should have had some sense of how insignificant a Giga anything is
compared to a Tera anything, whether binary or decimal.)

	      Stuart D. Gathman <stuart at bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

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