Re: In this partition scheme, grub does not find md information?

Moshe Yudkowsky wrote:

Keld Jørn Simonsen wrote:

quoted

On Tue, Jan 29, 2008 at 06:32:54PM -0600, Moshe Yudkowsky wrote:

quoted

quoted

Hmm, why would you put swap on a raid10? I would in a production
environment always put it on separate swap partitions, possibly a number,
given that a number of drives are available.

In a production server, however, I'd use swap on RAID in order to prevent server downtime if a disk fails -- a suddenly bad swap can easily (will absolutely?) cause the server to crash (even though you can boot the server up again afterwards on the surviving swap partitions).

I see. Which file system type would be good for this?
I normally use XFS but maybe other FS is better, given that swap is used
very randomly 8read/write).

Will a bad swap crash the system?

Well, Peter says it will, and that's good enough for me. :-)

I've done unplanned research into this, it will crash the system, and if you're unlucky some part of what's needed for a graceful crash will be swapped out :-(

As for which file system: I would use fdisk to partition the md disk and then use mkswap on the partition to make it into a swap partition. It's a naive approach but I suspect it's almost certainly the correct one.

I generally dedicate a partition of each drive to swap, but the type is "raid array." Then I create a raid10 on that set of partitions and mkswap on the md device. While raid10 is fast and reliable, raid[56] have similar reliability and a higher usable space from any given configuration.

-- 
Bill Davidsen [off-list ref]
 "Woe unto the statesman who makes war without a reason that will still
 be valid when the war is over..." Otto von Bismark



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