[ale] bigger disks under RAID1 with RHL 9 or RHEL4 on Dell PowerEdge?

[Jerry Yu]

thanks, Danny. I am aware of the growfs util to grow a software raid under
Linux. do you mean that it and its  cohorts can handle a hardware raid the
same way?

On 9/21/06, Danny Cox <DCox at icc.net> wrote:
>
> Jerry,
>
> On Wed, 2006-09-20 at 15:45 -0400, Jerry Yu wrote:
> > I am under the impression if I replace a 9G disk under RAID 1
> > (hardware raid by PERC) with a bigger disk, say 146G, the mirroring
> > would still work fine. After it all synced up, I can swap the
> > remaining 9G disk with yet another 146G. If all this works out, now
> > I'd have a pair of 146G with its top 9G used in the mirror w/o
> > interrupting service.  However, any way I can use the left-over
> > 146-9=137G ?
>
>         Yes, there's a new on-the-fly RAID resizing/restructuring feature
> in
> the later kernels.  See the Grow mode of mdadm.  You'll also need an FS
> that can dynamically grow also.  XFS can, and I'm pretty sure most of
> the others can too.
>
>         Do make a backup first, of course (words of bitter experience ;-).
>
> --
> Daniel S. Cox
> Internet Commerce Corporation
>
>
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