While copying from CD-rom my CPU useage skyrockets. actually mostly to 100%. this makes watching movies annoying and .. well anything to do with my CD-rom chunks along.

some1 mentioned that this http://members.optushome.com.au/odie84/cdgay.jpg has something to do with it. the PIO mode. how can i fix this?! any help appreciated.

try changing ide cable and update ya ide controler drivers.

make sure it's not in PIO mode. make sure it's in DMA

Is your CD-ROM on its own IDE channel? If not is it slave or master? See if DMA is activated. Actually, DMA shouldn't affect anything in this case. Ignore that :)

what version windows?

As has already been mentioned, it sounds like your drive is running in PIO mode - which basically relies on the CPU to control the data transfers over the bus. By default, Win2k and Win9x don't enable DMA for CD-ROMS, and no doubt XP probably doesn't either.

Go to: Control Panel->System->Device Manager->IDE ATA/ATAPI Controllers then go right click the channel your CDROM drive is on, then go to advanced settings and then see if DMA or PIO is enabled.

are u guys stupid didnt u look at the screenshot he took, it blantantly says its running in PIO mode.

1stly i would just like to say, did ANY of you open the link i posted? heh.

my cd-rom is on my secondary channel and PIO mode IS enabled. i want to disable it. but CANT. for those who are too lazy to click the link

http://members.optushome.com.au/odie84/cdgay.jpg

Genocide: check out your BIOS to see if that particular IDE channel (Secondary Slave) is being forced to use PIO.

Also if it's any old drive it's very possible it can only use PIO mode.

ok. heres some more info.

win2k service pack 2. asus a7v133c. diamond data cdrw 30*6*4 is the cd-rom. i'm running the latest via 4 in 1's.

this started since around about my last win reinstall. there is no option in the bios to force any pio mode, although the boot screen does report the drive is running in mode4 (whatever this is. PIO?) as far as i can tell i cant change it from anywhere.

man I don't think ANYONE saw the picture. I laugh at you all.

I'm sorry but I don't know how to fix it I just thought I'd mention the tardness of some people.

Check your BIOS settings, maybe something in there is set to PIO, if you have power DVD run it's little dma check utility thingo to see if it is set to DMA and if it's not, try setting it. Other than that, I don't think an IDE cable would make much difference since my cd rom says it's on DMA and it's only an old IDE 40pin/40 conductor, it's not a 40p/80c ATA100 cable.

edit: I shoould have refreshed before I posted :(

are u guys stupid didnt u look at the screenshot he took, it blantantly says its running in PIO mode.

I'll take the latter thanks Ken.

this started since around about my last win reinstall. there is no option in the bios to force any pio mode, although the boot screen does report the drive is running in mode4 (whatever this is. PIO?)

Mode 4 is PIO, maximum transfer rate of 16 MB/sec. Speed plus.

how can he fix it?

seeing it says DMA if available in both boxes and is set to PIO, maybe the drive is too old like someone suggested?

I had exactly the same problem Geno, try getting new firmware for your Cd-Rom and it will fix it. I had to flash my Plextor from 1.02 to 1.04 and now it works perfectly in DMA rather than pio

it used to run in dma mode before, if u also read stuff u woulda found that out also.

and he told u the fix .. now go fukin fix it

By default, Win2k and Win9x don't enable DMA for CD-ROMS, and no doubt XP probably doesn't either.

Weird, I never had to change anything to make win2k use DMA on my cd burner.

honestly half u guys dont even know what u are talking about.

neither ...

then why the f*** did u come here if u

#1: dont think anyone has a clue
#2: cbf trying out a possible solution

grrr, if u guys actually read the posts u might know what i am talking about.

yeha ok it has worked b4 .... something has obviously changed

how bout u try what capto said then come back if it didnt work

Mine used to work in DMA also until I added 4 more drives to my machine and change motherboards from an Asus A7M266 to Asus A7V266-E. Once I had this new configuration my plextor just would not go out of PIO.

I spent a day trying to work it out then decided to check plextors site for a new firmware and found a new one. Sine then it has worked perfectly.

thanks guys one of my cd roms was pio, i changed it, it works better now :)

also what are the dma modes?

i have 1 hdd on mode 4 and 1 on mode 5

also i have a raid board and a hdd on the raid ide chan, can i find out what dma mode that runs? i assume its dma 5 = ata 100 or something??

thanks

/me is noob at these hardware things

mode DMA 4 = ATA66
DMA 5 = ATA100

yeah thanks for the help on that, I was having the same problem myself!

thx to every1. specially capto who went out of his way for me. i havent fixed it yet. mainly because i am BONED. ta.

thanks capto - but all my drives are ata100.

strange, something to look into i guess

doh! i just researched the drive, its only ata66 this is a few year old 20gb drive its 7200rpm but only ata66 :(

i tried to help :(

denny: you can help again ;)

also i have a raid board and a hdd on the raid ide chan, can i find out what dma mode that runs? i assume its dma 5 = ata 100 or something??

thanks

tell me, tell me now! :P

seeing it says DMA if available in both boxes and is set to PIO, maybe the drive is too old like someone suggested?

Actually, a box came in today, and to cut a long story short, we installed a new 52x CD-ROM and surprise surprise it would only run in PI0 Mode 4 - no DMA. But wait it gets better - the old 40x ran perfectly fine in UDMA/ATA 33!

the firmware update fixed it, although really that makes no sense since i havent changed ANYTHING to make it run in PIO.

What a cool thread, you guys set this up nicely. GeN asks for help, dangles tells everyone that is attempting to help GeN to get f***ed.

n1

Weird, I never had to change anything to make win2k use DMA on my cd burner.

Cyph is exactly right. In win2k all drives are auto set to what you have set in your BIOS. If you have a look in ur bios (well most latest biosii) you will find DMA and PIO modes. You can select what you want in there. Default is DMA.

However in win98, it simply uses PIO unless you tick the little DMA box thingy in ur drive specs. I just worked that out the other day when my gateway was giving me hassles.

Oh and my burner will not work in DMA. Its very old so i assume the old drives dont really have support for DMA :(. Need to buy a new one someday...

Cyph is exactly right. In win2k all drives are auto set to what you have set in your BIOS. If you have a look in ur bios (well most latest biosii) you will find DMA and PIO modes. You can select what you want in there. Default is DMA.

However in win98, it simply uses PIO unless you tick the little DMA box thingy in ur drive specs. I just worked that out the other day when my gateway was giving me hassles.

Oh and my burner will not work in DMA. Its very old so i assume the old drives dont really have support for DMA :(. Need to buy a new one someday...

Wrong. I have UDMA/ATA 33 set for my CDROM in the BIOS and Windows 2000 defaults to PIO mode. This is the case and has been the case on a heap of other computers that I've installed Windows 2000 on.

Strange...

Every time i have installed win2k my install detects whats in the BIOS and sets it in the settings in win2k?!!?!?!

I set my burner to PIO a while ago and it detected that. I set my new hdd to UDMA 5 and it detected it too! I have installed win2k about 3 times, always detected my bios settings.

OMFG!! YOUR SO f***ING COOL, WHEN I GROW UP I WANT TO BE YOU!@%R#@%*


not.

go away idiot