On Tue, Apr 11, 2006 at 07:25:58PM +0200, Laurent CARON wrote:
> Andy Smith wrote:
> >On Tue, Apr 11, 2006 at 04:41:30PM +0200, Shai wrote:
> >>I have two SCSI disks on raid1.
> >>Since I have lots of reads from that raid, I want to add two more
> >>disks to this raid so that read will be faster.
> >>
> >>How should I add the new disks?
> >
> >Is this possible with md currently:
> >
> >Create a RAID-10 on the two new disks specifying one disk missing
> >from each mirror.
> >
> >Then copy data over and add the two existing disks letting it
> >resync?
> 
> Why not growing the array with 2 more disks?

Well I guess a RAID-1 of 4 disks would be slightly more redundant
than a 4 disk RAID-10, but it would have half the capacity, and the
read performance would be very similar, no?

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