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Message-ID: <4A1C1A79.2020500@s5r6.in-berlin.de> Date: Tue, 26 May 2009 18:36:09 +0200 From: Stefan Richter <stefanr@...6.in-berlin.de> To: Rogério Brito <rbrito@...rs.sf.net> CC: Alan Stern <stern@...land.harvard.edu>, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org Subject: Re: Question on the removable flag of USB devices Matthew Dharm wrote: > On Mon, May 25, 2009 at 01:45:54PM -0300, Rogério Brito wrote: >> The question is: how are devices determined to be removable or not? >> Sorry if this question is too naive. > > It's a bit that the device reports. The usb-storage driver passes this bit > to the SCSI layer. Wasn't this bit actually about removable _media_ rather than hotpluggable transports? (I.e. hardware where you can pull the medium out of the drive mechanism.) So in this sense, an USB attached HDD should actually not present itself as "removable" unless it's a SyQuest or Zip or something like that. Furthermore, if that's what the discussed bit stands for, than it is rather arbitrary to base a policy on it whether a volume may be mounted by non-root users or not. Rogério, perhaps static fstab entries based on /dev/disk/by-id/... can help. -- Stefan Richter -=====-==--= -=-= ==-=- http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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