Re: XFS over LVM over md RAID

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Eric Sandeen wrote:

yup F11 doesn't have all the nice blkid topology bits; F11 still has
libblkid in e2fsprogs, from before it was liberated to util-linux-ng.

(I wonder if we shouldn't just convert xfsprogs over to use the ioctls...)

Thanks both for your help. For various reasons, I'll just rely on using the non-topology aware version.

In the future this lv will be grown in multiples of 256K chunk, 16 drive RAID6 arrays, so am I correct in thinking that the sunit/swidth parameter can stay the same as it is expanded?

I am thinking that XFS allocates ag's across all the space and that it will only be writing to any one array at a time, or would there be more configured if mkfs.xfs were aware that it was being created on say, 2 x 16 RAID6 arrays?

This is based on backing up the first array prior to expansion, adding the second and mkfs.xfs, as I imagine just expanding the fs over the second would result in non optimal performance.

Regards,

Richard

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