10-10-2012
Quote:
Originally Posted by
fierfek
I would like to get both but datavg is the one i really need. I have tried using mksysb [...]
An "mksysb" is always an image of the
rootvg only. It is used to create a backup set with all the configuration/customization information of a system in place so that it can be set up again fast in case of a machine failure or to clone a system onto another one. In fact mksysb-format backups include boot blocks so it is possible to directly boot a system from such an image and restore it from it in one pass.
There is the more general command "savevg", which creates a backup for any volume group. "mksysb" is in fact using "savevg", but putting a boot block and other information in front of this image. gts1999 already told you about "savevg".
The destination for either a mksysb- or a savevg-image is classically a tape drive, but can be any device or file. Just make sure you have enough room for it on this device/file.
I hope this helps.
bakunin
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LEARN ABOUT REDHAT
mkbootdisk
MKBOOTDISK(8) System Manager's Manual MKBOOTDISK(8)
NAME
mkbootdisk - creates a stand-alone boot floppy for the running system
SYNOPSIS
mkbootdisk [--version] [--noprompt] [--verbose]
[--device devicefile] [--size size]
[--kernelargs <args>] [--iso] kernel
DESCRIPTION
mkbootdisk creates a boot floppy appropriate for the running system. The boot disk is entirely self-contained, and includes an initial
ramdisk image which loads any necessary SCSI modules for the system. The created boot disk looks for the root filesystem on the device sug-
gested by /etc/fstab. The only required argument is the kernel version to put onto the boot floppy.
OPTIONS
--device devicefile
The boot image is created on devicefile. If --device is not specified, /dev/fd0 is used. If devicefile does not exist mkinitrd cre-
ates a 1.44Mb floppy image using devicefile as the filename.
--noprompt
Normally, mkbootdisk instructs the user to insert a floppy and waits for confirmation before continuing. If --noprompt is specified,
no prompt is displayed.
--verbose
Instructs mkbootdisk to talk about what it's doing as it's doing it. Normally, there is no output from mkbootdisk.
--iso Instructs mkbootdisk to make a bootable ISO image as devicefile.
--version
Displays the version of mkbootdisk and exits.
--kernelargs args
Adds args to the arguments appended on the kernel command line. If this is not specified mkbootdisk uses grubby to parse the argu-
ments for the default kernel from grub.conf, if possible.
--size size
Uses ize (in kilobytes) as the size of the image to use for the boot disk. If this is not specified, mkbootdisk will assume a stan-
dard 1.44Mb floppy device.
SEE ALSO
grubby(8) mkinitrd(1)
AUTHOR
Erik Troan <ewt@redhat.com>
4th Berkeley Distribution Tue Mar 31 1998 MKBOOTDISK(8)