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[[!meta copyright="Copyright © 2000, 2007, 2008, 2009 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!meta title="zero store: empty block device"]]
A *zero* store is what `/dev/zero` is (always reads zeros), the setting on
`/dev/zero` gives no name (i.e. size) and the default size is the maximum
possible. The only meaning of the size of a *zero* is what `st_size` will
report and what offsets it will let you try to read or write from--there is
never any data associated with a *zero* store. (The code for this is in
`libstore/zero.c`.)
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