LinuxQuestions.org
Support LQ: Use code LQ3 and save $3 on Domain Registration
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Distributions > Ubuntu
User Name
Password
Ubuntu This forum is for the discussion of Ubuntu Linux.

Notices



Reply
 
Search this Thread
Old 04-28-2005, 06:19 PM   #1
Ptrs!OP
Member
 
Registered: Nov 2004
Location: Italy
Distribution: Ubuntu 7.04
Posts: 104

Rep: Reputation: 15
DMA problems on SiS746FX IDE channel


Hello to all,

I have switched to Ubuntu for months now and though I've been searching for all this time I still haven't been able to switch on DMA on my IDE channel.

I have an Athlon XP processor on a QDI K7S746FX motherboard (I SiS 746 chipset). My drives are set: /dev/hda: hard drive, /dev/hdb: DVD, /dev/hdc: CDRW. All of them have DMA off and can't change it with hdparm. And then I have a PCI SATA controller with a Maxtor hard disk. But I have the feeling that it is working really slow too. hdparm /dev/sda gives me:
/dev/sda:
Timing cached reads: 1020 MB in 2.00 seconds = 509.82 MB/sec
Timing buffered disk reads: 102 MB in 3.06 seconds = 33.38 MB/sec
Is that normal or slow?

I have tried editing the /etc/modules file, adding amd74xx or via82cxxx, but they didn't work. I have also changed the order in which the modules are loaded at startup, as those solutions where the ones that worked for most people in the forum. I think that it has to do with my chipset... Should I replace amd74xx or via82cxxx with something else that is specific for the SiS chipset?

Any help would be much appreciated!
 
Old 05-04-2005, 12:16 PM   #2
chile712
Member
 
Registered: Feb 2004
Posts: 61

Rep: Reputation: 15
may be this link will help. It help me alot. i know have DMA working on my HD, cdrw & dvdrw drives.

Link
 
Old 05-05-2005, 05:40 PM   #3
Ptrs!OP
Member
 
Registered: Nov 2004
Location: Italy
Distribution: Ubuntu 7.04
Posts: 104

Original Poster
Rep: Reputation: 15
Thank you for the link, but unfortunately it is not of any help. The problem is that for some reason it is the SiS chipset that gives me headaches. It seems that I should add a "SiS-something" module in my /etc/modules file. I am not in my linux computer at this moment so I can't tell you the exact module. The problem is that adding that, the computer stops during boot. It doesn't freeze, it just stops at some point, where it is "Configuring RAID devices" and if I press Ctrl+C it will just go on to the next step and there it will once again stop but will not respond any more to Ctrl+C. I don't know what else to do. It seems like the only thing left to do is to compile a new kernel, but I can't start such thing at this moment, for lack of time. Is there anything else I could try?
 
Old 05-05-2005, 06:57 PM   #4
chile712
Member
 
Registered: Feb 2004
Posts: 61

Rep: Reputation: 15
dont add "SiS-something" remove module in the /etc/modules file.

i followed the commands from " Configuring your system " section, to make sure my ide could do dma. To add DMA at boot i added these lines to my "/etc/init.d/bootmisc.sh" file.

/sbin/hdparm -m16C3 /dev/hda # sets multcount=16 && 32bit w/sync
/sbin/hdparm -d1u1c1X66 /dev/hdc # dma=on unmaskirq=on 32bit UDMA2
/sbin/hdparm -d1u1c1X66 /dev/hdd # dma=on unmaskirq=on 32bit UDMA2

i hope this helps
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2 HD on same IDE channel? Slow? kebabbert Linux - Hardware 10 11-03-2005 09:17 PM
which dma-channel does my soundcard use ? hoernchen Fedora 0 06-10-2005 06:15 AM
a Good 4+ channel PCI IDE Controller monohouse Linux - Hardware 0 10-28-2004 06:51 PM
Suse 8.2 change my DMA setting on my DVD-R drive to off & IDE DMA MODE NOT SHOWING IT maximalred Linux - General 0 08-23-2003 05:58 AM
does the choice of IDE channel matter for multiple harddrives? londo Linux - Newbie 4 08-17-2001 04:52 PM


All times are GMT -5. The time now is 05:28 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration