From: Goswin von Brederlow <goswin-v-b@web.de>
To: Simon Jackson <sjackson@bluearc.com>
Cc: "linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: Migrating RAID 1 volumes to Dual ported disks.
Date: Tue, 03 Nov 2009 20:32:15 +0100 [thread overview]
Message-ID: <87r5sf4d6o.fsf@frosties.localdomain> (raw)
In-Reply-To: <ABFC24E4C13D81489F7F624E14891C865AA4C65E@uk-ex-mbx1.terastack.bluearc.com> (Simon Jackson's message of "Tue, 3 Nov 2009 16:01:54 +0000")
Simon Jackson <sjackson@bluearc.com> writes:
> Hi.
>
> I am currently using SATA drives in a RAID 1 configuration. I am looking to use SAS drives instead of SATA. As my first experiment I have plugged my SAS drive into a system and I have noticed that Linux sees the individual ports on the device as separate devices, so I have /dev/sdc and /dev/sdd which are both the same physical device.
>
> So if I have a system with 2 SAS drives I am going to have 4 devices representing the two physical drives. So my question is how do I create RAID 1 sets for partitions on these types of drive?
>
> My existing system carves 3 RAID 1 volumes from a pair of drives. How do I translate this to the dual port SAS devices?
>
> Thanks Simon.
You would set up multipath to combine the two paths to the same disk
as a single device and then run raid over that.
MfG
Goswin
next prev parent reply other threads:[~2009-11-03 19:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-03 16:01 Migrating RAID 1 volumes to Dual ported disks Simon Jackson
2009-11-03 19:32 ` Goswin von Brederlow [this message]
2009-11-04 15:24 ` Simon Jackson
2009-11-05 2:02 ` Goswin von Brederlow
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