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Date: Fri, 28 Aug 2009 15:44:29 +0200
From: Milan Broz <mbroz@redhat.com>
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Subject: Re: [dm-crypt] Command failed: Can not access device on luksOpen
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To: Paul Bradley <paul.bradley.listmail@googlemail.com>
Cc: dm-crypt <dm-crypt@saout.de>

Paul Bradley wrote:
> 
> Following a power failure and reboot luksOpen is failing for an
> encrypted device:
> 
> ~$ sudo cryptsetup luksOpen /dev/satadisks_vg/backup_lv cryptbackup
> Command failed: Can not access device

> open("/dev/satadisks_vg/backup_lv",
> O_RDONLY|O_EXCL|O_SYNC|O_DIRECT|O_LARGEFILE) = -1 EBUSY (Device or
> resource busy)

This means that device exclusive open failed.

Check "dmsetup info" for open count for this device - should be 0.

Milan