MKINITRD (8)
creates initial ramdisk images for preloading modules
SYNOPSIS
mkinitrd [-fv] [--with=module] [--preload=module]
[--omit-scsi-modules] [--omit-raid-modules]
[--version] [--fstab=fstab] image
kernel-version
DESCRIPTION
mkinitrd creates filesystem images which are suitable for use
as Linux initial ramdisk (initrd) images. Such images are often
used for preloading the block device modules (such as SCSI or RAID)
which are needed to access the root filesystem. mkinitrd
automatically loads all scsi_hostadapter entries in
/etc/conf.modules, which makes it simple to build and use kernels
using moduler SCSI devices.
Any module options specified in /etc/conf.modules are passed
to the modules as they are loaded by the initial ramdisk.
If the root device is on a loop device (such as /dev/loop0), mkinitrd
will attempt to build an initrd which sets up the loopback file properly.
To do this, the fstab must contain a comment of the form:
# LOOP0: /dev/hda1 vfat /linux/rootfs
LOOP0 must be the name of the loop device which needs to be configured, in
all capital lettes. The parameters after the color are the device which
contains the filesystem with the loopback image on it, the filesystem which
is on the device, and the full path to the loopback image. If the filesystem
is modular, initrd will automatically add the filesystem's modules to the
initrd image.
OPTIONS
-f
Allows mkinitrd to overwrite an existing image file.
--fstab=fstab
Use fstab to automatically determine what type of filesystem the
root device is on. Normally, /etc/fstab is used.
--ifneeded
Only builds the image if their are modules that need to be loaded at boot
time.
--omit-scsi-modules
Do not load any scsi modules, including 'scsi_mod' and 'sd_mod'
modules, even if they are present.
--omit-raid-modules
Do not load any raid modules, even if /etc/fstab and /etc/raidtab expect them.
--preload=module
Load the module module in the initial ramdisk image. The module gets
loaded before any SCSI modules which are specified in /etc/conf.modules.
This option may be used as many times as necessary.
-v
Prints out verbose information while creating the image (normally
the mkinitrd runs silently).
--version
Prints the version of mkinitrd that's being used and then exits.
--with=module
Load the modules module in the initial ramdisk image. The module
gets loaded after any SCSI modules which are specified in
/etc/conf.modules. This option may be used as many times as
necessary.
FILES
/dev/loop*
A block loopback device is used to create the image, which makes this
script useless on systems without block loopback support available.
/etc/conf.modules
Specified SCSI modules to be loaded and module options to be used.
SEE ALSO
AUTHOR
Erik Troan <ewt@redhat.com>
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