[mythtv-users] Faster CPU and more RAM in SD frontend or backend?

Kevin Kuphal kkuphal at gmail.com
Tue Jun 3 13:33:13 UTC 2008


On Tue, Jun 3, 2008 at 8:14 AM, George Mari
<george_mythusers at mari1938.org> wrote:
> Kevin Kuphal wrote:
>> On Mon, Jun 2, 2008 at 11:40 PM, Johnny Russ <jruss at mit.edu> wrote:
>>>> I agree with making the P3 the backend, although 384MB is on the low
>>>> end, it should be OK.  It depends on how many tuners you have and
>>>> whether you will have anything else running on the box.
>>> I just have one tuner and I don't plan on adding anymore any time soon.
>>>
>>>> Stuffing 4 drives in the case, make sure there is  good airflow over
>>>> those drives.
>>>>
>>>> With 2x160GB and 2x250GB drives, will you make a 4x160 RAID5 or RAID0?
>>> Yeah I was a little worried about heat. Maybe its time to cut a fan hole in
>>> the side of my case. I think I am going to go with RAID5. The 160 GB drives
>>> are getting old and I imagine one of them is going to go eventually
>>
>> Don't bother.  Myth can use each drive independently for storage in a
>> storage group.  If one dies, there is zero risk of it taking out any
>> other drive or the filesystem stretched across multiple drives.  Sure,
>> you lose whatever was on that drive, but it's just TV and I find the
>> possibility of losing everything if the RAID array fails is far
>> worse...
>>
>
> I agree using storage groups is probably easier to setup and maintain
> than RAID5.
>
> But I have found Linux software RAID to be very robust and reliable.
>
> My decision to use RAID5 stems from the fact that there are programs
> that I record that are shown only once, and are never rerun.  I cannot
> buy a DVD of the program after the fact, because they don't sell them.
> If I was using storage groups, and the drive the show was on died before
> I got to watch it, that would be bad.  Granted, that's a pretty remote
> possibility - to some people, not worth the extra effort to setup RAID5.
>
> I started using RAID5 before storage groups were available, and granted,
> I would get similar benefits and reliability from storage groups, but
> for me, I don't see a reason to change at this point.

I'd agree.  I use RAID-5 on another Linux system at home that house my
photos.  I need the redundancy there.  I simply burn any recordings to
DVD (as files, not as video DVDs) that I feel I need backups of.

Kevin


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