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3 .\" This file may be copied under the terms of the GNU Public License.
7 e2image \- Save critical ext2/ext3 filesystem metadata to a file
14 .I image-file
20 to a file specified by
21 .IR image-file .
22 The image file may be examined by
30 e2fsck will be enhanced to be able to use the image file to help
34 .I image-file
41 creating a raw image file using the
43 option, since the process of creating a normal image file currently
44 requires random access to the file, which cannot be done using a
53 The image file should be stored on some filesystem other than
59 creates the image file as a sparse file.
60 Hence, if the image file
67 The size of an ext2 image file depends primarily on the size of the
70 image file will be approximately 35 megabytes; a 4 gigabyte filesystem with
72 image file. Image files tend to be quite
73 compressible; an image file taking up 32 megabytes of space on
76 .SH RESTORING FILESYSTEM METADATA USING AN IMAGE FILE
81 file back to the device. It can be used to restore the filesystem metadata
89 file was created, data
98 option will create a raw image file instead of a normal image file.
99 A raw image file differs
100 from a normal image file in two ways. First, the filesystem metadata is
102 etc. can be run directly on the raw image file. In order to minimize
103 the amount of disk space consumed by a raw image file, the file is
104 created as a sparse file. (Beware of copying or
105 compressing/decompressing this file with utilities that don't understand
106 how to create sparse files; the file will become as large as the
107 filesystem itself!) Secondly, the raw image file also includes indirect
108 blocks and directory blocks, which the standard image file does not have,
126 of the directory blocks before writing the image file. However,
