[[!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`.)