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geom_uzip — GEOM based compressed disk images
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"
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
The geom_uzip driver was written by Max Khon <fjoe@FreeBSD.org>. This manual page was written by Ceri Davies <ceri@FreeBSD.org>.