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IDE question

B

BadAssSaturn

Limp Gawd
Joined
Jul 2, 2003
Messages
413
Ok, I have only 1 Hard Drvie and only 1 cdrom(burner) in my computer.

Would it be faster to have them both on the same ide cable/channel or to have them on seperate channels?

Ex:
When I want to copy a cd, which would be faster... both on the same IDE cable/channel or on seperate ide channels?

Let me know
 
Thanks for the info

Now I need to buy another ata133 cable... off to frys after work tommorow ... just another reason to go there
 
The cdrom doesn't need to be on an ata133 cable. Any old 40 pin ide cable will do. But yes, separate is the way to go.
 
ATA 66 cable = ATA 100 cable = ATA133 cable

they're all 80 pin.

you could use an old 40 pin ATA 33 cable with that CDRW just fine.
 
well, I have about 15 ide cables here... Almost non of them are labeled with a ata* so I will just use one... lol

Thanks for all of the info
 
Hard Drive and CDRom running of of same IDE controller, is this a bad thing? currently on the 2nd page
Originally posted by Stiletto One
Anyway, right now, you're slowing your hard drive down to ATA/33 transfer rates. Put the CD-RW and DVD-RW together.
Click to expand...
Not entirely true, access to the CDR is a DMA mode2 (33MB/s), so whenever the CDR is accessed, the HDD has to wait (ATA|ATAPI being sequential one at a time access) however
Independent Device Timing allows two devices to share a channel each at their own maximum speed, for the HDD thats probably DMA mode5 (100MB/s)

but the thing is, youd need to saturate the bus to notice that slowdown, normally easier said than done

BusTrace IDE/ATAPI Bus Utilixzation Monitor (Freeware)


now there is a caveat to Independent Device Timing, it wont share the channel if one device is PIO and the other DMA, it will then kick the DMA capable device down to PIO mode as well
and since windows will degrade a device that has a problem to PIO, Independent Device Timing will degrade both


all said and done, you wouldnt have any issues with modern CDRW burning software and both the HDD (source) and CDRW (target) on the same channel, but there is a slight advantage under very limited circumstances to combine the opticals on the same channel
Click to expand...


Ideally each drive would be on its own channel, but dont sweat it too much if you need to double up, just give a little thought to your typical transfers from what source to what target, as long as they are on seperate channels it will be slightly faster, but even if you cant always manage that, it should still be OK ;)

Originally posted by BadAssSaturn
well, I have about 15 ide cables here... Almost non of them are labeled with a ata* so I will just use one... lol
Click to expand...
IDE is ATA\ATAPI
just make sure that any cable that has a HDD attached is an 80 wire cable (it will still have a 40 pin connector)
 
very nice, and thorough, ice czar. i was about to reply till i saw yours. i cant stand this old mis-comprehended issue. you can also note that this started with the triton fx logic sets. since the cd-rom's were still in pio transfer and have not caught up to dma 1 transfer that the hd's supported. users needed to seperate the two. creating the myth now but a minor problem back in the early 90's.
 
Indeed :D
a mythology reinforced by Windows device manager downgrading a drive to PIO when it develops a problem
and then both defaulting
 
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