[vdr] Re: VDR recording problem

["HGM.bg \(GMX\)" <vdr.hgm.bg@gmx.net>]

Ryan Mak wrote:

> # hdparm -tT /dev/hdc1
> 
> /dev/hdc1:
>  Timing buffer-cache reads:   128 MB in  2.74 seconds = 46.72 MB/sec
>  Timing buffered disk reads:  64 MB in  8.10 seconds =  7.90 MB/sec

That's not so good, in my expierence, below 10 MB/sec for buffered reads
is bad and the system is not fast enough for writing and the interrupts
of the dvb-card.

My results:
/dev/hda:
 Timing buffer-cache reads:   1088 MB in  2.00 seconds = 543.27 MB/sec
 Timing buffered disk reads:  118 MB in  3.01 seconds =  39.25 MB/sec

/dev/hdb:
 Timing buffer-cache reads:   984 MB in  2.01 seconds = 489.87 MB/sec
 Timing buffered disk reads:  106 MB in  3.04 seconds =  34.82 MB/sec

/dev/hdc:
 Timing buffer-cache reads:   1032 MB in  2.00 seconds = 515.56 MB/sec
 Timing buffered disk reads:  132 MB in  3.05 seconds =  43.31 MB/sec

/dev/sda:
 Timing buffer-cache reads:   1024 MB in  2.00 seconds = 511.82 MB/sec
 Timing buffered disk reads:  162 MB in  3.02 seconds =  53.69 MB/sec

Check in /proc/ide if you use the correct drivers for your ide-chipset
(might be necessary to compile a new kernel) and check that dma is
enabled ! This can be checked with hdparm -i /dev/hdc in your case !

/hgm.bg