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Re: [Xen-devel] vscsi and /dev/tape/by-path

On Wed, Jan 12, 2011 at 09:27:24AM +1100, James Harper wrote:
> > > For disk, /dev/disk/by-uuid might be a better option, although it
> > > depends on your requirements. For tape, my system /dev/tape/by-path
> is
> > > the only available option on my system, although I could probably
> create
> > > a /dev/tape/by-id path easily enough using the serial number or
> > > something. by-id would allow the device to be moved across different
> > > busses and still remain the same, but obviously breaks when a tape
> drive
> > > fails and has to be replaced, which happens fairly regularly.
> > 
> > So could the fix you are thinking of, check both of those places?
> > What would the syntax end up for the vSCSI? I presume not SCSI ID
> > but now just the UUID (or perhaps the SCSI inq S/N? ?)
> > 
> Well all of those entries are just symlinks back to the /dev/stX or
> /dev/sdX etc device, do I don't think we need to do anything else other
> than follow the symlinks. I used os.realpath() (I think that was it) and
> it works fine. I was just wondering if that was the right solution.

I think yes, but we should get the input from the authors of the vscsi
backend/frontend ...

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