• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

Cd-ROMS and Hard Drives

dreamliner77

The Analog Kid
#1
I can't seem to get a straight answer on a couple of things:

Will having an optical drive (cd, cd-rw, dvd) on the same IDE cable slow down the performance of the hard drive (ATA 133)?

Also, I can only get the cd-rom and cd-rw to show up as PIO-4. They still seem to operate correctly though. I know others have been able to change them to DMA. HOW? I tried through device manager with no results (they are set to auto select DMA if available).

Another question I can't seem to get consensus on is if I should have both optical drives on one cable and the hard drives on the other cable. I do alot of disc to disc copying. Anyone have any good ideas?

BTW, I just decided to ditch my ATA133 card. Too many probs.

Any insight into this would help me tremendously. Trial and error is really starting to suck...
 
#2
Yes having a PIO device as a secondary to a UDMA device will slow the UDMA device to the speed of the PIO device.
PIO is CD ROMs and things like that, UDMA are hard drives.

CD ROMs on max speed transfer are PIO-4.
In XP I think that the DMA settings are managed by XP.

It is best to have both optical drives on the secondary controller if you are using the primary for your system Hard drive, I have onboard RAIDand ATA100, along with the standard IDE ports, so I have 4 ports to attach drives to so I have each drive as a master on its controller, the optical drives on the IDE ports and the hard drives on the ATA100/RAID controller.
 

dreamliner77

The Analog Kid
#3
Here's what I'm gonna do:

Primary IDE:
Master = 60 gig quantum ata 100
Slave = 60 gig Maxtor ata 133

Seconday IDE:
Master = HP 12x CD-RW
Slave = Hitatchi DVD-ROM

See any probs? WHat I worry about its slow cd-cd copying. I guess I'll just have to try it and see what happens
 
#4
Originally posted by gtgarside
Yes having a PIO device as a secondary to a UDMA device will slow the UDMA device to the speed of the PIO device.
PIO is CD ROMs and things like that, UDMA are hard drives.

CD ROMs on max speed transfer are PIO-4.
In XP I think that the DMA settings are managed by XP.

It is best to have both optical drives on the secondary controller if you are using the primary for your system Hard drive, I have onboard RAIDand ATA100, along with the standard IDE ports, so I have 4 ports to attach drives to so I have each drive as a master on its controller, the optical drives on the IDE ports and the hard drives on the ATA100/RAID controller.
This is a misknown thing, It will only slow it down when BOTH are in use at the same time. in other words if you are copying a cd to a HD it will only copy as fast the the cd rom can transfer at PIO. But the harddrive will go full speed. That is why drive controllers can have Device 0 and device 1 configured in different modes..IE one in DMA, one in PIO

they WILL NOT slow down just cause the cdrom is on the chain...that is SCSI, NOT ide.

Just thought i'd clear that up, it's one of the things we had to learn to get our A+ cert ;) ..and if you EVER want a challenge.. try to set up a server using on SCSI devices it S-U-C-k-S!!!

Only SCSI devices are affected by the slowest on the chain rule...not IDE
 

Members online

No members online now.

Latest posts

Latest profile posts

Perris Calderon wrote on Electronic Punk's profile.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS

Been running around Quora lately, luv it there https://tinyurl.com/ycpxl
Electronic Punk wrote on Perris Calderon's profile.
All good still mate?
Hello, is there anybody in there? Just nod if you can hear me ...
Xie
What a long strange trip it's been. =)

Forum statistics

Threads
61,962
Messages
673,240
Members
89,015
Latest member
loxioalix