On Thu, Feb 07, 2002 at 01:12:04PM +0100, Fredrik Lindgren wrote:
> > > So, if it took 3 hours to add 50 gb to a 60 gb array, a rough
> > > calculation says it will take about 19 hours to add 100 gb
> > > to a 380 gb array, which is close to your calculations, yet
> > > still lower.
> >
> > My calculations was a very rough estimate - perhaps you will
> > see a performance degradation when moving to larger
> > partitions (because average seek time will be slightly
> > higher), but I'm not sure if that is going to be noticable at all.
>
> I did run raidreconf on a 560Gb array (8x80Gb RAID5) adding another
> disk taking it to 640Gb. Machine was an Athlon 1200Mhz with 512Mb
> RAM. All disks on diffrent IDE channels. Samsung 5400rpm disks.
> Estimated runtime was 29 hours, it had been going for about 21h when
> it crashed because of bad sectors on the new disk (duh!). At that
> point it was 70%+ complete so the estimate was pretty accurate
> in this case.
Thanks a lot for the feedback !
Tough luck with the data though ;)
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