Free Software Foundation!

Join now


From Free Software Directory
Jump to: navigation,

The cowloop-driver is a copy-on-write loop driver (block device) which can be used on top of any other block driver. It shields the lower driver from any write access and diverts all write-accesses to an arbitrary regular file, called the cowfile. When a modified block is read again later on, the cowloop-driver gets the block from the cowfile, while non-modified blocks are obtained from the original read-only device. This lets block-devices be used in a read-write fashion without modifying the underlying block-device itself.


LicenseVerified byVerified onNotes
GPLv2orlaterJanet Casey15 December 2004

Leaders and contributors


Resources and communication

Audience Resource type URI
Bug Tracking,Developer,Support E-mail

Software prerequisites

This entry (in part or in whole) was last reviewed on 13 June 2005.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 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 page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

Personal tools