Date: Sun, 23 Nov 2003 23:57:19 +0000 From: Jez Hancock <jez.hancock@munk.nu> To: questions@freebsd.org Subject: Re: (Semi)hot swap IDE Message-ID: <20031123235719.GE82057@users.munk.nu> In-Reply-To: <200311231117.hANBHBnV020674@lv.raad.tartu.ee> References: <200311222031.hAMKVwm2006917@lv.raad.tartu.ee> <200311231117.hANBHBnV020674@lv.raad.tartu.ee>
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On Sun, Nov 23, 2003 at 01:16:50PM +0200, Toomas Aas wrote: > > 1. The 'generic' removeable drive trays for IDE that use a normal IDE > > controller (like attaching to the slave or secondary channel on most > > onboard IDE), with another disk or device attached that's being used, do > > not support removeable devices. It's _extremely_ likely that you'll > > hang the IDE bus. > > If there is only CD-ROM (which is almost never used) attached as > primary master and the removable disk attached as secondary master then > maybe I don't need to worry too much about that. Just for the record I have the kind of setup you're talking about - I successfully 'hot swapped' a 40Gb IDE disk using a hdd caddy tray but there are caveats (mostly highlighted above) - using the term 'hot swap' loosely here because it just doesn't feel too clever doing it :P I found the following: - I could remove/reinsert the device only if it was originally in the machine on boot - this is fairly obvious I suppose. Otherwise the device just doesn't show up. - I could re-insert the device successfully but only if I'd umounted it first before removing it. - Removing the disk without umounting produced random results - sometimes the disk could be re-inserted ok, other times not, as the previous poster mentioned the IDE controller appears to hang. For the record iirc the disk was attached to the secondary ide controller with a hdd and a cdrom drive on the first ide controller. Best thing is to play - doesn't make as much noise (or smoke) as hot-swapping PCI cards! -- Jez Hancock - System Administrator / PHP Developer http://munk.nu/
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