NAME

       geom_uzip — GEOM based compressed disk images

SYNOPSIS

       To compile this driver into the kernel, place the following line in your kernel configuration file:

             options GEOM_UZIP

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             geom_uzip_load="YES"

DESCRIPTION

       The  geom_uzip  framework provides support for compressed read only disk images.  This allows significant
       storage savings at the expense of a little CPU time on each read.  Data written in the  GEOM  label  area
       allows  geom_uzip to detect compressed images which have been created with mkuzip(8) and presented to the
       kernel as a logical disk device via md(4).  geom_uzip creates a unique md#.uzip device for each image.

       The geom_uzip device is subsequently used by the FreeBSD kernel to access the disk images.  The geom_uzip
       driver does not allow write operations to the underlying disk image.  To check which md(4) devices  match
       a given geom_uzip device:

             # geom uzip list
             Geom name: md1.uzip
             Providers:
             1. Name: md1.uzip
                Mediasize: 22003712 (21M)
                Sectorsize: 512
                Mode: r1w0e1
             Consumers:
             1. Name: md1
                Mediasize: 9563648 (9.1M)
                Sectorsize: 512
                Mode: r1w0e1

SEE ALSO

       GEOM(4), md(4), geom(8), mkuzip(8)

AUTHORS

       The  geom_uzip  driver  was written by Max Khon <fjoe@FreeBSD.org>.  This manual page was written by Ceri
       Davies <ceri@FreeBSD.org>.

Debian                                           October 9, 2006                                    GEOM_UZIP(4)