From: Neil Brown <neilb@suse.de>
To: Piergiorgio Sartor <piergiorgio.sartor@nexgo.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: Detecting array parameters
Date: Thu, 10 Jun 2010 08:31:12 +1000 [thread overview]
Message-ID: <20100610083112.47aa2200@notabene.brown> (raw)
In-Reply-To: <20100609211340.GA12172@lazy.lzy>
On Wed, 9 Jun 2010 23:13:40 +0200
Piergiorgio Sartor <piergiorgio.sartor@nexgo.de> wrote:
> Hi,
>
> if I understood it correctly, in order to detect
> the several array parameters (number of disks, for
> example), it is possible to use "mdadm -D /dev/mdX"
> or to check the files in the corresponding /sys/block/...
> /mdX/... files.
>
> Now, assuming something needs to be done in scripts,
> what would be the best way? Using "mdadm -D ... | grep"
> (or "mdadm ... | gawk ...."), or to read the proper
> files in /sys/block/md...?
>
> Assuming the wanted information is available on both
> sides, which does not seem always the case.
If it is available in
mdadm --detail --export
I would use that.
Otherwise probably go for
/sys/class/block/mdX/md/...
I say /sys/class/block rather than /sys/block as there are rumours of
deprecating /sys/block. Don't know if that will ever happen though.
NeilBrown
next prev parent reply other threads:[~2010-06-09 22:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 21:13 Detecting array parameters Piergiorgio Sartor
2010-06-09 22:31 ` Neil Brown [this message]
2010-06-12 9:58 ` Piergiorgio Sartor
2010-06-17 5:52 ` Neil Brown
2010-06-10 23:04 ` Leslie Rhorer
2010-06-12 9:59 ` Piergiorgio Sartor
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