You can get yourself a decent SAS RAID controller on ebay for $100 or so
that will handle 8 devices. SAS Controllers will work with SATA drives and
allow you to do off-CPU RAID5 or RAID6. I have not used one of these for
backuppc but I do have an MS-SQL server running 4 SAS disks in RAID5 on an
IBM controller and am very satisfied with it. software RAID5 is great for
large files but the latency added from going to the CPU and main memory
kills small file writes.
The only thing that might get you is that these cards are pretty much all
PCI-E 4x+ so you would need either a true server market board or an intel
chipset P35 that has a second PCI-E slot that can be used for non-graphics
cards or simething similar. Either that or be willing to mod a PCI-E 1x
slot by cutting out the back of the slot with a dremel BUT that 1x slot will
be a bottleneck for you.
On Thu, Feb 28, 2008 at 11:29 PM, John Pettitt <[EMAIL PROTECTED]> wrote:
> David Rees wrote:
> > On Wed, Feb 27, 2008 at 4:38 PM, Stephen Joyce <[EMAIL PROTECTED]>
> wrote:
> >
> >> (Mostly) agreed. If you can afford a hardware raid controller, raid 5
> is a
> >> good choice.
> >>
> >
> > To clarify, a hardware raid controller with battery backed RAM is a
> > good choice fo RAID 5, otherwise it will either be very slow for small
> > random writes or run the risk of data corruption.
> >
> > -Dave
> >
> >
> And creating directory entries very much counts as small random writes
> and BackupPC does a lot of that.
>
> John
>
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