From: "Keld Jørn Simonsen" <keld@dkuug.dk>
To: "Daniel L. Miller" <dmiller@amfes.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Grow a RAID-10
Date: Thu, 3 Jul 2008 01:10:26 +0200 [thread overview]
Message-ID: <20080702231026.GA15028@rap.rap.dk> (raw)
In-Reply-To: <486BF974.70508@amfes.com>
On Wed, Jul 02, 2008 at 02:56:04PM -0700, Daniel L. Miller wrote:
> I currently have a RAID10 across (4) SATA drives. It looks like I'm
> going to need to grow in the near future. Any tips for a procedure for
> this? My current plan:
>
> 1. Add a PCI SATA controller (MB had 4 SATA + 4 RAID SATA, it's a Tyan
> MB with a NFORCE chipset, I'm not sure if I want/can use the RAID SATA
> ports as plain SATA connections).
Why not use the mobo raid sata ports? They are probably faster than a
controller on the pci bus. What kind of pci bus do you have?
PCI-E 1x is likely to be too slow for a 4-drive raid10,f2 array.
My 4-drive raid10,f2 delivers about 320 MB/s and newer disks should be
able to deliver 360 MB/s - well above the 250 MB/s that a PCI-E 1x can
deliver.
> 2. Add 2 more drives - not necessarily the same size as the existing
> (they were all 4 the same)
>
> 3. Execute "mdadm --grow /dev/md0"
What kind of raid10 do you have?>
Best regards
keld
next prev parent reply other threads:[~2008-07-02 23:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-02 21:56 Grow a RAID-10 Daniel L. Miller
2008-07-02 23:10 ` Keld Jørn Simonsen [this message]
2008-07-03 1:47 ` Daniel L. Miller
2008-07-03 8:46 ` Keld Jørn Simonsen
2008-07-03 16:29 ` Daniel L. Miller
2008-07-03 7:28 ` Robin Hill
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