Date: Fri, 27 Jan 1995 07:58:08 -0600 From: Peter da Silva <peter@bonkers.taronga.com> To: Peter Dufault <dufault@hda.com> Cc: terry@cs.weber.edu (Terry Lambert), john@pyromania.apana.org.au, hackers@FreeBSD.org Subject: Re: SyQuest works with FreeBSD 2.0R ! Message-ID: <199501271358.HAA09305@bonkers.taronga.com> In-Reply-To: Your message of "Fri, 27 Jan 95 06:50:47 EST." <199501271150.GAA07921@hda.com>
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The real solution to removable media is to put some sort of ident in the disklabel (including time and system ID) and track that. If you have a mounted filesystem and get a UNIT ATTENTION then you can see whether it's been swapped or not. (yes, you can still defeat this with a dd to the raw device) What would be really cool would be to create a new pseudo-device entry when you mount the device, and treat each volume as a separate device. Then you could simply stall attempts to access a filesystem mounted on a device that's been removed. Perhaps even have a hook to alert the user when they do that to insert the appropriate volume... (ok, that's blue-sky... an ID in the disklabel is just good hygeine)
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