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IDE/ATA vs. SCSI and CPU speed...
Posted: Tue Jul 24, 2001 11:01 am
by Peter Vigren
Is there anyone that know which ports, commands and parameters that SCSI use? I know IDE/ATA but only the one that supports up to 128 Gb... Is there anyone that knows IDE/ATA up to 2 Tb?
How do I detect the CPU speed in asm?
Re: IDE/ATA vs. SCSI and CPU speed...
Posted: Tue Jul 24, 2001 11:37 am
by df
Is there anyone that know which ports, commands and parameters that SCSI use? I know IDE/ATA but only the one that supports up to 128 Gb... Is there anyone that knows IDE/ATA up to 2 Tb?
How do I detect the CPU speed in asm?
I have never seen an IDE thats 2TB big. I've only seen 70gig ones. SCSI command interface is totally different to IDE. scsi is packeted, IDE is not (not in the same sense as SCSI).
Re: IDE/ATA vs. SCSI and CPU speed...
Posted: Tue Jul 24, 2001 3:15 pm
by BLoggins02
Some newer drives are ATAPI drives, so they share SCSI's packeted interface, but most drives are not. ?I have to be honest, I'm not looking forward to this part of my OS development. ?Sure the hacking will be fun, but as far as finding a centralized source of information on ATA(IDE)/ATAPI, CHS, LBA, and all that stuff, I haven't been able to find a central place that talks about it all. Oh well, at least it will be an adventure.
Re: IDE/ATA vs. SCSI and CPU speed...
Posted: Tue Jul 24, 2001 10:01 pm
by df
well i am still writing the osdev supsetsite hehe. will work some more on it this weekend.
when that goes up, you will find all that kinda info!
wont be up for a week or two, depends how much code i get done this weekend...