[mythtv-users] RAID using two drives per PATA channel ?

[Steven Adeff]

On 7/31/06, yan <yan at seiner.com> wrote:
> Steven Adeff wrote:
> > anyone have any insight in to whether when neglecting possible card or
> > cable failure, would using two drives on a single PATA channel for a
> > RAID 10 array to add two more drives lead to an overall increase in
> > the array speed, or would the speed loss be too great for the extra
> > drives to help any?
> >
> > thanks!
> >
> >
> In my experience, using two drives (master/slave) on a single PATA cable
> gets you throughput slightly less than using a single drive, provided
> the two drives are evenly matched.  The rule of thumb is that throughput
> will be less than that of the slower device.
>
> Also, expect rebuilds to take forever.
>
> Other than that, I run 4 PATA drives in a RAID-5 without any problems
> using 2 controllers.

right, I'm just wondering if doing so along with adding two more
drives to the controller for the RAID10 will have an overall speed
increase or not. the other option is to get a 4-port SATA controller
and buy 4x300GB drives (and do what with my current 300GB PATA drives
I ask myself...)

My case can only handle 6 harddrives, so my recordings drive will only
ever be 6 drives total, so these are pretty much my only two options
without buying a new motherboard. (unless anyone knows of a socket 939
nforce based mobo with 5xPCI slots with 6SATA ports that works well in
linux?)

thanks!

-- 
Steve
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