On Saturday 23 September 2006 13:29, James Wilkinson wrote: >Joel Rees wrote: >> The sales guy at Pasokon Kobo over in Mikage a couple of years back >> warned me against trying to use both master and slave at the same time, >> but they admitted to not having much experience with Linux. In the >> MSWindows universe they were familiar with, there were enough reports >> of silent corruption they figured it was best to stay with one channel, >> one drive, particularly when building RAID on ATA controllers. > >There *used* to be problems with some controllers, most notoriously the >CMD640. For more details, see Documentation/cdrom/ide-cd and >Documentation/ide.txt (from the kernel documentation). > >The CMD640 is now obsolete. > I know I'm hijacking a thread here, but I have a box thats running my milling machine that resembles this particular duck in that it will not willingly tolerate a drive set as slave on the primary interface, corrupting both drives at the drop of a very small hat. This board, a mach-speed, has this ide controller on it: 0000:00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP]) Subsystem: VIA Technologies, Inc. VT82C586/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE Flags: bus master, medium devsel, latency 32 I/O ports at dc00 [size=16] Capabilities: [c0] Power Management version 2 After removal of the slave drive I was trying to dual boot from, that box is as solid as a rock. So take this for whatever its worth. I also haven't tried it as hdd because the cables won't reach due to the drives position in the case. >> Correct me if I'm wrong, but master and slave on a single channel >> can't handle commands concurrently? > >That's my understanding. And that's why *I* would advise against having >two devices on the same channel *if* they are both going to be heavily >used at the same time. > >If they are used for different OSes, that sounds fine. > >James. > >-- >E-mail: [email protected] | DON'T be put off by "horror stories" spread by > others. aprilcottage.co.uk | People who talk about death and serious > injury are very > > | rarely the ones who have actually suffered such > | things. -- Adrian Plass -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2006 by Maurice Eugene Heskett, all rights reserved.