Forgive the question of ignorance: Does (SUSE) Linux have this Direct Memory Access (DMA) thing or not? Windows seems to have it, and while I am not saying that Linux should have everything Windows does, I find that accessing optical discs from Linux is somewhat slower than from Windows. -- Tux #395953 resides at http://samvit.org playing with KDE 3.52 on SUSE Linux 10.0 $ date [] CCE +2006-04-04 W14-2 UTC+0530
On Tuesday 04 April 2006 11:02 pm, Shriramana Sharma wrote:
Does (SUSE) Linux have this Direct Memory Access (DMA) thing or not? Windows seems to have it, and while I am not saying that Linux should have everything Windows does, I find that accessing optical discs from Linux is somewhat slower than from Windows.
You can turn on dma by typing this command: hdparm -d1 /dev/dvd Bryan **************************************** Powered by Mepis Linux 3.3.1 KDE 3.3.2 KMail 1.7.2 This is a Microsoft-free computer Bryan S. Tyson bryantyson@earthlink.net ****************************************
Bryan S. Tyson wrote:
On Tuesday 04 April 2006 11:02 pm, Shriramana Sharma wrote:
Does (SUSE) Linux have this Direct Memory Access (DMA) thing or not? Windows seems to have it, and while I am not saying that Linux should have everything Windows does, I find that accessing optical discs from Linux is somewhat slower than from Windows.
You can turn on dma by typing this command: hdparm -d1 /dev/dvd
Or use YaST > Hardware > IDE DMA mode. I think these modes are usually set correctly on setup anyway. -- JDL
On Wednesday 05 April 2006 07:57, John D Lamb wrote:
Bryan S. Tyson wrote:
On Tuesday 04 April 2006 11:02 pm, Shriramana Sharma wrote:
Does (SUSE) Linux have this Direct Memory Access (DMA) thing or not? Windows seems to have it, and while I am not saying that Linux should have everything Windows does, I find that accessing optical discs from Linux is somewhat slower than from Windows.
You can turn on dma by typing this command: hdparm -d1 /dev/dvd
Or use YaST > Hardware > IDE DMA mode.
I think these modes are usually set correctly on setup anyway.
-- JDL
If it's a cd or dvd device you will most likley find it off by default and need to use Yast as above to turn dma mode on the optical drives ON .. Pete . -- The Labour party has changed there emblem from a rose to a condom as it more accuratley reflects the governments political stance. A condom allows for inflation halts production destroys the next gereration, protects a bunch of pricks, and givesyou a sense of security while you are actually bieng fucked from GSM
Forgive the question of ignorance:
Does (SUSE) Linux have this Direct Memory Access (DMA) thing or not?
Windows seems to have it, and while I am not saying that Linux should have everything Windows does, I find that accessing optical discs from Linux is somewhat slower than from Windows. The question has been answered in the previous posts, but I would like to add a somewhat political comment here. DMA is a feature of the hardware drivers and has been a feature in Linux
On Tuesday 04 April 2006 11:02 pm, Shriramana Sharma wrote: probably since 1991. Historically, in the past there was a hardware problem with some IDE controllers so Linux was shipped with DMA turned off (back in 2.2 kernel time frame I believe). More recent releases (SuSE 9+) have shipped with DMA generally turned on for HD, but as mentioned otherwise, turned off for optical devices) it is easily configurable through YaST. Additionally, Linux disk I/O has also been shown to be faster than Windows I/O, even when reading from or writing to Windows native file systems. Both Linux and Unix have a number of kernel buffers that are used by Linux and the drivers to buffer all the I/O. -- Jerry Feldman <gaf@blu.org> Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9
participants (5)
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Bryan S. Tyson -
Jerry Feldman -
John D Lamb -
Peter Nikolic -
Shriramana Sharma