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| author | Milan Broz <gmazyland@gmail.com> | 2017-02-15 20:26:02 +0100 |
|---|---|---|
| committer | Milan Broz <gmazyland@gmail.com> | 2017-02-15 20:26:02 +0100 |
| commit | 9da67b701da394336a7f6a011a3fc7eb2b6ce84e (patch) | |
| tree | b254756c141cf2b87ed367e43e90839cab1bc12f /man | |
| parent | ef7ecb5567cdfe033314e8564c3639abb2166727 (diff) | |
| download | cryptsetup-9da67b701da394336a7f6a011a3fc7eb2b6ce84e.tar.gz | |
Clarify use of --size parameter.
Diffstat (limited to 'man')
| -rw-r--r-- | man/cryptsetup.8 | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/man/cryptsetup.8 b/man/cryptsetup.8 index 55ac3b9f..b3cce841 100644 --- a/man/cryptsetup.8 +++ b/man/cryptsetup.8 @@ -107,10 +107,15 @@ Reports the status for the mapping <name>. .IP Resizes an active mapping <name>. -If \-\-size (in sectors) is not specified, the size of the -underlying block device is used. Note that this does not -change the raw device geometry, it just changes how many -sectors of the raw device are represented in the mapped device. +If \-\-size (in sectors) is not specified, the size is computed +from the underlying device. For LUKS it is the size of the +underlying device without the area reserved for LUKS header +(see data payload offset in \fBluksDump\fR command). +For plain crypt device the whole device size is used. + +Note that this does not change the raw device geometry, it just +changes how many sectors of the raw device are represented +in the mapped device. .SH PLAIN MODE Plain dm-crypt encrypts the device sector-by-sector with a single, non-salted hash of the passphrase. No checks @@ -732,7 +737,7 @@ All other LUKS actions will use the key-size specified in the LUKS header. Use \fIcryptsetup \-\-help\fR to show the compiled-in defaults. .TP .B "\-\-size, \-b <number of 512 byte sectors>" -Force the size of the underlying device in sectors of 512 bytes. +Set the size of the device in sectors of 512 bytes. This option is only relevant for the \fIopen\fR and \fIresize\fR actions. .TP |