linux-kernel - Re: [linux-usb-devel] [FEATURE REQUEST] Transparent hot plugging of root file system on portable storage devices.

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Message-Id: <200801021119.22104.oliver@neukum.org>
Date:	Wed, 2 Jan 2008 11:19:21 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Pavel Machek <pavel@....cz>
Cc:	Raymano Garibaldi <raymano@...nos.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	USB development list <linux-usb-devel@...ts.sourceforge.net>
Subject: Re: [linux-usb-devel] [FEATURE REQUEST] Transparent hot plugging of root file system on portable storage devices.

Am Dienstag 01 Januar 2008 schrieb Pavel Machek:
> Hi1
> 
> > I would like to request a feature in the Linux kernel that would allow
> > a user to unplug a live read-only root file system which exists on a
> > detachable storage device such as a USB key drive. The desired
> > behavior is that once the same device is reattached to the computer
> > the user can continue work transparently without having to reboot.
> > 
> > Having such a feature is becoming more important with advances in
> > detachable solid state drive technology.
> 
> Yep, that would be nice.... In fact, patch would be very welcome :-).

Use the USB persist feature and hibernate. It should work. If you modify
the fs in any way, you'll crash and burn. Unmounting / is harder which you
need if you want to do this safely.

	Regards
		Oliver

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