Re: resync (what is it doing when making a new array?)

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On Sun, 8 Aug 2004, Gordon Henderson wrote:

> On Sat, 7 Aug 2004, Eli Cantu wrote:
>
> > (watching a raid 5 array, composed of five 250gb disks, resyncing...to
> > be completed 16 hours from now...)
>
> One thing to check (if it's IDE drives) is that they are working in DMA
> mode - use hdparm /dev/hda, etc. to check and force DMA if necessary
> (although you might need to re-compile your kernel to include the correct
> drivers for your IDE hardware)
>
> It'll still take a long time with 250GB drives, though.

16 hours seems kind of long.  I've recently been dealing with a 6 200gb
drive (SATA) sw RAID5, and resyncs took around 3 hours on an otherwise
totally idle P4 2.4ghz.

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