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diskdumpfmt(8) -- Linux man page
NAME
diskdumpfmt - format a dump device or a partition
SYNOPSIS
diskdumpfmt
[
-v
]
[
[
-a
]
[
-p
]
[
-f
]
|
-c
]
device
- diskdumpfmt -V
-
DESCRIPTION
diskdumpfmt
is a program to format a block device file or partition device file
that is to be specified as a disk dump device. However,
diskdumpfmt
can format only the unmounted device. If a device is mounted somewhere,
diskdumpfmt
cannot even check on whether the device is a dump device. In that case,
diskdumpfmt
returns a value 7 which means the device has already been mounted.
There are two types of formatting. The first type is called the
initial formatting, and it writes special signatures over every page-size block
of the dump partition. The second type is called the normal formatting, and it
writes special signatures over all page-size blocks except for block #0.
Block #0 is used as the dump partition header, and is never modified during
a memory dump operation. The administrator must run an initial formatting of
each dump device partition only once. The normal formatting is required
after each memory dump, but typically it is run automatically by the
diskdump rc script.
As for only device formatting,
diskdumpfmt
returns 255 if it fails due to an error. Otherwise it returns 0.
OPTIONS
- -a
-
Format all blocks of the dump partition. Unless this option is specified,
diskdumpfmt
checks blocks only that is checked by kernel. Then
diskdumpfmt
formats those blocks.
- -c
-
Check the status of the dump partition.
diskdumpfmt
returns one of the following values.
-
0: the partition does not require formatting
1: the partition contains a memory dump
2: the partition requires initial formatting
3: the partition requires formatting
4: the partition is not suitable for diskdump
5: the partition is swap partition
6: the partition is swap partition which contains
a memory dump
- -f
-
Format the dump partition forcibly without checking on whether the partition
is a diskdump-dedicated device. That is called the initial formatting.
- -p
-
Display progress for formatting.
- -v
-
Provide some verbose outputs.
- -V
-
Show version information and exit.
SEE ALSO
diskdumpctl_proc(8), diskdumpctl_sysfs(8), savecore(8)
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