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IDE controller cpu utilization

G

GD695372

Senior member
I've heard that on-board IDE controllers put a heavy load ont he cpu(and have also witnessed this). I've also heard that IDE expansion cards(atleast some of them anyway) offload a lot of the processing onto the card itself vs the cpu. I was wondering if someone could confirm or deny this. If this is the case, I'd like to get a pci IDE controller card, mainly because I do a lot of large file transfers and don't have enough money to go SCSI. Any info and or suggestions as to specific cards would be greatly appreciated. I use win98fe, linux(mandrake 7.2), and win2k(no service pack), and plan on running freebsd in the near future. I would need a controller that is supported by all of these oses since I would be booting from it.

NOTE: I'm not talking about RAID at all, just IDE.
 
UDMA off loads CPU loads when doing transfers over an ATA bus. I think you might be talking about some of the old PIO modes. Those were both slow and took tons of CPU time.

Using an off board helps out with old PIO mode only drives. I would especially recommend it for CDRs since I don't know of any that use UDMA.

I believe that Promise cards are supposed to work with Linux, but I've only heard it, not seen it.
 
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