Date: Thu, 31 Dec 1998 18:18:46 -0700 From: Steve Passe <smp@csn.net> To: Greg Lehey <grog@lemis.com> Cc: Joe Gleason <clash@tasam.com>, freebsd-hardware@FreeBSD.ORG Subject: Re: IDE hot plugging (was: IDE Antics) Message-ID: <199901010118.SAA08051@Ilsa.StevesCafe.com> In-Reply-To: Your message of "Fri, 01 Jan 1999 11:19:42 %2B1030." <19990101111942.W39598@freebie.lemis.com>
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Hi, > On Thursday, 31 December 1998 at 11:59:36 -0500, Joe Gleason wrote: > > Right now I have a server with 4 ide drives. I want to unmount and remove the > > two that are on the secondary chain, preferably while the box is up. > > I have the drives in those cool little dataport things that allows me to just > > slide them out. > > > > If I never do anything to /dev/wd2 or /dev/wd3 will the system ever discover > > they are not there anymore and crash? > > > > Note: I don't really need to do this, I am just wondering what will happen. > > Some drives need to be jumpered differently for `alone' and `master'. > If your drives are of this kind, you lose. One way or the other, > though, I'd expect them to crash. I'm sure that hot plugging is way > down on the list of priorities for the IDE ``standard''. We do exactly this many times a week (some weeks). the 'alone' vs. master/slave thing is not an issue since both drives are on the same chain. We do it to clone ide drives for products. Be sure to: Power/boot the machine with both drives in place, strapped as master & slave. mount manually after drives are installed & powered. unmount manually before drives are unpowered. Never use drives of different make/model in same slot between boots. As you said, never access either drive while they are removed/unpowered. This will lock the machine (although I have successfully recovered from this by replacing the drive and powering it up, probably dumb luck!). We've done this at least a 100 times so far without failure. -- Steve Passe | powered by smp@csn.net | Symmetric MultiProcessor FreeBSD To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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