[mythtv-users] Tuner Card w/ Svideo Inputs & PCI Sound Transfer

[Kyle Rose]

>> On a PATA 100 Seagate 7200 RPM drive on my single Athlon 
>> 1800+ in super-duper hdparm mode (-c 3 -d 1 -u 1 -m 16 -X 
>> 69), I find that writes max out at about 20 MBytes/sec when 
>> things are tweaked (bdflush set to flush dirty buffers once 
>> per second instead of once every thirty seconds, for 
>> instance).  So, I'd be surprised if you got more than 32 
>> MBytes/sec on SATA, even at its maximum transfer rate (166?).
>
> My newly built system with a Seagate 7200.7 SATA drive consistently gives
> ~50 MBytes/sec from hdparm - this is without tweaking anything with hdparm
> or bdflush. SATA's maximum transfer rate (in current implementations) is 150
> MBytes/sec.

I did the equivalent of "adding wrong".  My performance analysis
involved reading and writing from the same drive, so one would expect
performance to double; hence, ~41 MBytes/sec, which is very close to
the 42 MBytes/sec that hdparm -t gives me.  Still, that only
reinforces my point that he shouldn't be drive-speed limited by
anything he'll probably try to do.

Cheers,
Kyle