[mythtv-users] Question re: available SATA ports and linux software RAID

Richard Morton richard.e.morton at gmail.com
Thu Apr 7 10:33:54 UTC 2011

Please excuse brevity and pistakes this email was composed on an Android


On 7 Apr 2011 10:58, "Jean-Yves Avenard" <jyavenard at gmail.com> wrote:
> Hi
> On 7 April 2011 19:33, Alex Butcher <mythlist at assursys.co.uk> wrote:
>> Personally, my view is that with the price of storage as it is, parity
>> is only useful when one needs lots of cheap storage and the data stored
>> it is mostly quiescent; archives and the like. Otherwise, I prefer either
>> RAID1 or RAID10, depending on budget. Mine is probably a minority
>> though.
> What a weird view.. So you use RAID1 no matter what? forget about
> wasting that much disk ?
> You'll also find you get much greater resistance to hardware failure
> with parity RAID. You also get a greater throughput.
>> I've not use SAS controllers before, but you should be able to connect
>> drives to them. I don't know how well that'll work, though. As another
>> poster mentioned, you'll also need some kind of break-out cable/board.
> SAS is backward compatible with SATA; you only need a SAS->SATA cable
> ; it's usually one port -> 4 SATA.
>> HOWEVER... many of the chipsets used on cheap SATA controllers are buggy:
>> <http://codemonkey.org.uk/2009/01/20/sata-disasters-silicon-image-3114/>
>> <http://marc.info/?t=123089876500001&r=1&w=2>
>> <https://bugs.launchpad.net/ubuntu/+source/linux/+bug/263160>
> Something plugged out of the blue obviously, and certainly a one-off
> occurrence.;
> JY
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