speed tip

[Jauder Ho]

Use hdparm to turn dma on.

--Jauder

On Fri, 10 Aug 2001, Laurence Brevard wrote:

> At 09:39 AM 8/10/2001 -0700, Jauder wrote:
> >...
> >[root at turtle linux]# cat /proc/ide/hdc/settings
> >name                    value           min             max
> >mode
> >...
> >using_dma               1               0               1               rw
> >...
>
> Some questions:
>
> (0) What is the best place to get answers to these questions?
>      :-)
>
> (1) What controls the use of DMA for the DVD-ROM drive?
>
>      I have tried ...
>
>      >echo using_dma:1 > /proc/ide/hdc/settings
>
>      ... but this does not change the using_dma parameter
>          which is currently 0.
>
> (2) How do I tell the system that my /dev/hdc is a DVD-ROM?
>
>      I believe this kernel has special provisions for DVD.
>
>      Checking boot messages: dmesg | grep -i ROM shows:
>      hdc: DVDROM 10X, ATAPI CD/DVD-ROM drive
>
>      I also find this in the boot messages
>      hdc: bad special flag: 0x03
>
>      There was no /dev/dvd link, only /dev/cdrom -> /dev/hdc
>      I added /dev/dvd -> /dev/hdc
>
> SYSTEM INFORMATION:
>
> H/W: Pentium III FCPGA Coppermine 700Mhz, 100MHz front side bus
>       RAM: 320MB ECC SD-RAM (PC-133) at 133Mhz
>       Transcend AVD3 motherboard
>
>       Maxtor 27GB ATA-66, 7200RPM hard disk as /dev/hda
>       Afreey 10X DVD-ROM as /dev/hdc
>       Video AGP 8MB NVidia TNT
>       Sound Blaster PCI 128
>       Intel eepro 10/100
>
> O/S: RedHat 7.1 with all "up2date" updates including 2.4.3 kernel
>
> Thanks,
>
> LAURENCE C. BREVARD                          Laurence at BrevardAndBrevard.com
> BREVARD & BREVARD, Inc.                    http://www.BrevardAndBrevard.com
> MOBILE: +1(512)426-6237   or email text messages: 5124266237 at mobile.ATT.net
> 7701 Mesa Drive, Austin,TX 78731-1312   FAX:512-343-2964 VOICE:512-343-2723
>
>
>
>