From: likewhoa <likewhoa@weboperative.com>
To: Gavin Flower <gavinflower@yahoo.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Best way to create RAID-6 for swap partition - existing one failed
Date: Wed, 18 May 2011 15:57:22 -0400 [thread overview]
Message-ID: <1305748642.10481.1.camel@darkside> (raw)
In-Reply-To: <4DD41713.5070407@hardwarefreak.com>
Why not just let the kernel handle the stripping for you, IMO using
dmraid is overkill for swap when it can all be handled by the kernel
itself with 'swap -p1 /dev/sda1' for example.
On Wed, 2011-05-18 at 13:59 -0500, Stan Hoeppner wrote:
> On 5/16/2011 4:41 PM, Gavin Flower wrote:
>
> > Motivation, existing RAID-6 swap partition failed. I am thinking I should recreate it in a new format, as currently it is 'Version : 0.90', rather than simply rebuild it.
> <snip>
>
> Forget using a partition. Simply use a swap file. This example creates
> a 1GB swap file in the / filesystem. You can locate it on any
> filesystem you wish.
>
> # swappoff -a
> # dd if=/dev/zero of=/swapfile1 bs=1024 count=1048576
> # mkswap /swapfile1
> # swapon /swapfile1
> # vi /etc/fstab
> Add:
> /swapfile1 swap swap defaults 0 0
>
> and remove your old entry for the failed swap partition.
>
> There is little performance difference between swap files and swap
> partitions with modern kernels. The kernel will map the disk location
> of the swap file and perform direct disk access, bypassing the
> filesystem and buffer cache.
>
next prev parent reply other threads:[~2011-05-18 19:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-16 21:41 Best way to create RAID-6 for swap partition - existing one failed Gavin Flower
2011-05-18 15:01 ` David Brown
2011-05-18 18:59 ` Stan Hoeppner
2011-05-18 19:57 ` likewhoa [this message]
2011-05-18 20:32 ` Gavin Flower
2011-05-18 20:59 ` likewhoa
2011-05-18 20:13 ` Gavin Flower
2011-05-18 21:53 ` Stan Hoeppner
2011-05-18 22:31 ` Gavin Flower
2011-05-18 23:01 ` Stan Hoeppner
2011-05-18 20:42 ` Gavin Flower
2011-05-18 22:26 ` Stan Hoeppner
2011-05-18 22:55 ` Gavin Flower
2011-05-19 0:11 ` Gavin Flower
2011-05-19 2:26 ` Stan Hoeppner
2011-05-19 2:50 ` Gavin Flower
2011-05-19 3:28 ` Stan Hoeppner
2011-05-19 4:05 ` Gavin Flower
2011-05-19 8:17 ` Stan Hoeppner
2011-05-20 3:32 ` Leslie Rhorer
2011-05-19 9:04 ` Gordon Henderson
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