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i was fooling around on my old computer which has two old cd drives. i stupidly enabled DMA on them, and now after rebooting windows 98 does not see the cd drives at all :(
in device manager, i see a yellow ! for secondary IDE controller (dual fido). i think that's where the problem is. i can't turn DMA back off (pretty sure the drives don't support it now), because i can't see the CD drives in device manager anymore. what should i do?
Hi Romelus, and welcome to Windrivers!Quote:
Originally Posted by romelus
My experience here, and it is only one place to look, is to do the following:
Click on <Start> <Run> <regedit>
In the registry, click on File, and Export Registry. Name it something meaningful to you so you can get it back if necessary, and save it.
Now click on Edit, and Find.
In the dialog box, type NOIDE
If it finds this anywhere, DELETE it.
If it finds it, after you delete it, hit the F3 key to make sure there are no more instances. If found, delete them also.
Make no other changes to the registry at this time.
Close the registry editer and reboot. If this doesn't bring the controller back, we will try something else :)
look at this article You need to delete the esdi and the mf keys in SAFE mode. Reboot to normal mode, windows should reload the ide devices (cdroms included) Then reinstall your motherboard drivers (if appropriate). What motherboard or chipset is it?
Tell me/us the exact models & we can tell you ;) (also tell us about any harddrives too please as that's part of the 'sum' I 'waffle about' below ;))Quote:
Originally Posted by romelus
Pretty much every drive now is dma capable 'somehow' - but there's lots of complications like IDT (independent device timing - that's when drives can or can't run at different speeds on the same channel) & also there's the differences between MW-DMA & UDMA (Multiword & ultra) which is to do with the 'size' of data sent to & from the unit & then loads more complications about what works 'good' with what ..
& then to cap it all off you've got 'switch down' drivers going 'wappy' too ! (Many IDE & atapi drivers for many controllers are able to support IDT by sensing how 'well' data is transfered & switching the drives speed up or down through all the various DMA & PIO {programmable Input/Output} modes - sometimes {infact frequently} this doesn't quite work as 'intended' !)
tekboy, i could not find the noide key in the registry :( the secondary ide controller (dual fifo) has this message: this device is either not present, not working properly, or does not have all the drivers installed (code 10)
noonoo, i'm inclined to try your suggestion. i don't think i can find the motherboard driver cd rom, this computer is really old. can't seem to see what kind of motherboard it is in device manager. i know it's made by gigabyte - and doesn't support cpu's higher than 333 mhz. what are the chances i'll need to reinstall the motherboard drivers after deleting those keys? and what are the consequences if i fail to reinstall the drivers? i'm scared to mess things up more than i've already done...
confus-ed, i would be able to give you the exact model #s if i could see them in device manager. once i get them back in windows i'll be able to tell you. trust me when i say they are old though, one of them is only a 4x!
If you follow NooNoo advice, windows 98 should find the drivers for the ESDI divces with no problems. Don't worry about the motherboard drivers.Quote:
Originally Posted by romelus
Yup and if it is a via or amd chipset, it will tell you in device manager and you can reload them afterwards.
ahahahahaha it worked!!!
after i deleted the key values, windows reinstalled the ide controllers and everything is back to normal!
the cd drives are creative cd5233e-n and mat****a cd-rom cr-581
at this point i really don't care if they are dma capable, i'm just happy to get them back :) :)
thanks very much guys, i really appreciate the help
So the Pansonic dive (thats ma****a short for Matsu****a Electric Industrial Co Ltd., sometimes known as Matsu****a-Kotobuki Electronics Industries Ltd. which is long for Panasonic :D) is mw dma .. & the creative is udma.Quote:
Originally Posted by romelus
Err but to tell you definately I need your hard drive model too as I note "computer is really old" (333) so maybe also mw dma hard drive .. {& motherboard details too, to be really sure :rolleyes:, for techies there are tools like aida}..
For all the difference it'll likely make, I think I might settle for just 'working' ;)
MW dma & pio mode 4 are pretty much the same speed (stuff here about it , so it can make no practical difference many times.
So unless you hard drive is also running in pio mode (which will make a difference to speed & performance) then don't worry about it. :)
confus-ed, i'll settle for just working :) the computer is only used by my mom to go online, and i've flown back to the east coast so i can't view the hard drive info now. i don't think she uses the cd roms much anyway. as far as i remember, the main hard drive is an IBM brand, 10 gb, bought around late 1998 / early 1999. the motherboard was bought in late 1998.
the panasonic is a 4x, which came with a pentium 120. i highly doubt it's useful to tweak it. the creative is a 52x, and sadly works worse than the 4x, that's the drive i was trying to "improve". anyway i'm glad it's at least visible in windows. thanks again, this is a great board and i'm surprised i hadn't found it earlier