Hi
On Monday 14 November 2011, Josh Triplett wrote:
> Source: linux-2.6
> Version: 3.1.0-1~experimental.1
> Severity: normal
>
> I use dm-crypt on my system, and I have an SSD. The underlying disk
> device, sda, has rotational=0:
>
> ~$ cat /sys/block/sda/queue/rotational
> 0
>
> However, the device-mapper devices have rotational=1:
>
> ~$ head /sys/block/dm-*/queue/rotational
> ==> /sys/block/dm-0/queue/rotational <==
> 1
[...]
> The device-mapper devices should inherit the setting for "rotational"
> from their underlying devices.
>
> - Josh Triplett
While I don't know about dm-crypt specifically, that issue should be
fixed in 3.2~rc1:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=4693c9668fdcec229825b3763876b4744f9e6d5e
(it is for plain lvm2, at least)
Regards
Stefan Lippers-Hollmann
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