[mythtv-users] gt 240, fanless card .. issues

[John Drescher]

On Tue, Feb 2, 2010 at 4:22 PM, Misc Things <formisc at gmail.com> wrote:
> On Tue, Feb 2, 2010 at 1:26 PM, David Durham <david.durham.jr at gmail.com>
> wrote:
>>
>> >> $ sudo hdparm -tT /dev/sdh
>> >>
>> >> /dev/sdh:
>> >>  Timing cached reads:   7820 MB in  2.00 seconds = 3913.46 MB/sec
>> >>  Timing buffered disk reads:   40 MB in  4.31 seconds =   9.27 MB/sec
>> >>
>> >
>> > That is ridiculous. The buffered disk read should be 10 times that
>> > number..
>>
>> I ran it a few more times.  Any idea what the issue could be?
>>
>>
>> $ sudo hdparm -tT /dev/sdh
>>
>> /dev/sdh:
>>  Timing cached reads:   8196 MB in  2.00 seconds = 4101.81 MB/sec
>>  Timing buffered disk reads:    2 MB in  3.53 seconds = 580.46 kB/sec
>> $ sudo hdparm -tT /dev/sdh
>>
>> /dev/sdh:
>>  Timing cached reads:   8036 MB in  2.00 seconds = 4021.32 MB/sec
>>  Timing buffered disk reads:    4 MB in 14.20 seconds = 288.43 kB/sec
>> $ sudo hdparm -tT /dev/sdh
>>
>> /dev/sdh:
>>  Timing cached reads:   7744 MB in  2.00 seconds = 3875.10 MB/sec
>>  Timing buffered disk reads:    2 MB in  4.90 seconds = 417.84 kB/sec
>>
>>
>>
>> -Dave
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>
>
> it's not IDE so not be a bus issue..
>

I have seen a very low number like this once on my laptop with a sata
harddrive. The generic ide driver was being loaded before the ich
sata/acpi driver and being used instead of the proper sata driver.
After removing generic sata support from my kernel I got 60+ MB/s
instead of 2 to 6MB/s. That happened quite a few kernels ago however.
Like kernel 2.6.18 or so..

John