Re: remove-single-device removes mounted HDDs (kernel 2.6)

[Matthew Wilcox <matthew@wil.cx>]

On Thu, Aug 11, 2005 at 04:32:51PM +0200, Harald Seipp wrote:
> James Bottomley wrote on 11.08.2005 15:59:27:
> > On Thu, 2005-08-11 at 12:09 +0200, Harald Seipp wrote:
> > > I assume this is a bug? How can I prevent that behavior? Can I easily
> query
> > > if a device on "h b t l" is mounted to work-around?
> >
> > No, it's expected behaviour.  The mount keeps a reference to the old
> > device node so it can't be reused.
> Ok - but shouldn't the behavior that devices that have mounted partitions
> can be removed be considered as a bug?
> Linux 2.4 SCSI Subsystem Howto, proc interface: "....The removal will fail
> if the device is busy (e.g. if a file system on the device is mounted)."

The trouble is that users can surprise-remove drives (eg USB memory) and
there's nothing we can do about it.  So the SCSI subsystem is designed
to cope as best it can with such a scenario rather than trying to forbid
in software an action that already took place in hardware.

-- 
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he enjoys after this process of grotesque self-deception." -- Mark Twain