From: Milan Broz <mbroz@redhat.com>
To: f-dm-c@media.mit.edu
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] cryptsetup
Date: Wed, 02 Sep 2009 07:13:30 +0200 [thread overview]
Message-ID: <4A9DFEFA.205@redhat.com> (raw)
In-Reply-To: <200909020301.XAA06354@out-of-band.media.mit.edu>
f-dm-c@media.mit.edu wrote:
> Shouldn't there be a "cryptsetup resize" in there somewhere?
> [Presumably before you resized the ext2]
There is no device size stored in LUKS header, only data offset.
So after luksClose/luksOpen the device has always new size, of course
if you increase size extended part of device still contains old data.
You can also resize device online - just use "cryptsetup resize <name>".
(The --size parameter is not mandatory, man page is wrong here,
if --size is not provided, it will expand to whole device).
So if you have LUKS on partition, and you want extend it:
extend partition -> resize crypt mapping (or deactivate/activate) -> resize fs
For reducing just do it in reverse order
resize fs -> deactivate cryptsetup -> reduce partition.
(if you need it online, you will have to specify --size for cryptsetup resize,
note that --size is in sectors)
Milan
--
mbroz@redhat.com
next prev parent reply other threads:[~2009-09-02 5:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-02 1:14 [dm-crypt] cryptsetup solarflow99
2009-09-02 2:42 ` test532
2009-09-02 3:01 ` f-dm-c
2009-09-02 5:13 ` Milan Broz [this message]
2009-09-02 10:12 ` Gilles PIETRI
-- strict thread matches above, loose matches on Subject: below --
2012-04-20 11:37 omar ahizoun
[not found] <CAAdJYJY6e9XTbZs8VTji9WKSPvEs7w4J8xxXLeo9=htOZS_5Hw@mail.gmail.com>
2017-11-10 17:05 ` [dm-crypt] Cryptsetup Steven Houtchen
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