[sclug] hot drives

[Andy Smith]

On Mon, Jun 19, 2006 at 11:28:45PM +0100, Bob Franklin wrote:
> Of course, software RAID does give you a performance hit.

Yes and no; it would be very difficult to arrange to use 6 disks
separately for a typical workload and still get as good performance
and redundancy as software RAID-5 or RAID-10, for example.

Perhaps if they were put in 6 different computers and the workload
was paralellised.. :)

> And you can't partition a /dev/mdX directly; you need to use LVM
> to do this, which slows things more and seems unnecessarily
> complex to me, but it's the way to do it (I'm told) and it's how I
> have my server.

It is possible to partition an md device btw, although I would still
use LVM.  I've never had need to partition one, but have read about
it in mdadm man pages, and seen people on linux-raid list doing it.

Cheers,
Andy

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