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max allowable # of ata controller on a PCI bus

Posted: Tue Oct 29, 2024 2:00 am
by ITchimp
According to Tanenbaum's book, max # of ata drive is 8, 4 per controller... I am wondering if there is a limit on the max number of ata controllers on a PCI bus?

Re: max allowable # of ata controller on a PCI bus

Posted: Tue Oct 29, 2024 9:35 am
by nullplan
ITchimp wrote: Tue Oct 29, 2024 2:00 am I am wondering if there is a limit on the max number of ata controllers on a PCI bus?
No limit other than the constraints of PCI and the architecture (you will run out of I/O ports at some point).

Re: max allowable # of ata controller on a PCI bus

Posted: Tue Oct 29, 2024 3:21 pm
by ITchimp
Is it still true that first (and or second) ata controller have to be in compatiblity mode?

Re: max allowable # of ata controller on a PCI bus

Posted: Tue Oct 29, 2024 8:30 pm
by Octocontrabass
ITchimp wrote: Tue Oct 29, 2024 3:21 pm Is it still true that first (and or second) ata controller have to be in compatiblity mode?
That has never been true.