Messages in this thread |  | | | Date | Thu, 25 Apr 1996 20:24:48 +1000 (EST) | | From | David Monro <> | | Subject | Re: IDE Disk speed enhancements |
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[lots of stuff about overlapped transfers on different ide interfaces]
"Marty Leisner" <leisner@sdsp.mc.xerox.com> writes: > So it would make sense to configure two disks as /dev/hda and > /dev/hdc, instead of > /dev/hda and /dev/hdb?
Absolutely! If you have two interfaces, use them - makes a big difference. Really speeds up fsck ;-) Seriously, for ide interfaces you really only want one device per interface if possible.
(Actually it has been possible to do this for a very long time - I used to maintain a patch which was a merge of the atdisk2 dual interface code (Delman Lee I think?) and the Mark Lord ide enhancements patch back a while - the last version (which is still on tsx-11) is for 1.1.2[234]. After that Mark merged it and it all ended up in the distribution kernel. The original atdisk2 patches probably predate 1.0 - but I only had one drive back then).
> > I've never seen this written anywhere...
Until recently, having a second interface was pretty rare - I only had one because I got lucky with a card sold to me. Now that everybody has motherboards with two interfaces on them, or at least a soundcard with an ide CDrom, we should point this out somewhere. These days the kernel will handle at least 4 interfaces, so I guess they should be filled hda, hdc, hde, hdg, hdb, hdd, hdf, hdh. Anybody with an old machine with a single interface but with an ide cdrom as well should move that second drive over...
> > -- > marty > leisner@sdsp.mc.xerox.com > Member of the League for Programming Freedom > > >
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