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From: Uwe Menges <uwe.menges@web.de>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] how to determine the mapped device from the original device
Date: Thu, 10 Dec 2009 02:20:36 +0100	[thread overview]
Message-ID: <4B204CE4.3080104@web.de> (raw)
In-Reply-To: <6F8A7585-60EB-4844-90B9-06EE3BB2A76E@thompsonlogic.com>

Alvin Thompson wrote:
> I was wondering if it is possible to determine the mapped device from the original device.  For example, if you used the command:
> 
>   cryptsetup luksOpen /dev/sdd1 backup
> 
> Can you later determine the mapped device name ('backup' in this case) if all you know is the device (/dev/sdd1)?

I don't know that, but I use entries in /etc/crypttab like:

backup01 /dev/disk/by-uuid/... /dev/shm/backupkey luks,noauto

and use

# cryptdisks_start backup01

which causes /dev/mapper/backup01 to appear.
Corresponding /etc/fstab entry is:

LABEL=backup01  /backup/disk1 auto noauto,noatime,nodiratime

Maybe this helps you with handling the devices.

Yours, Uwe

  reply	other threads:[~2009-12-10  1:20 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-10  0:37 [dm-crypt] how to determine the mapped device from the original device Alvin Thompson
2009-12-10  1:20 ` Uwe Menges [this message]
2009-12-10  7:35 ` Milan Broz
2009-12-11  4:17 ` Arno Wagner
2009-12-11  9:15 ` Mario 'BitKoenig' Holbe

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