Re: HSV : ghosts & multipath

christophe.varoqui
2003-08-13T11:53:15Z

Hello,

sg_start, which comes with latest sg3_utils, does the trick, indeed.
Thanks for the tip.

Selon Evan Felix <evan.felix@pnl.gov>:

> The HSV Ghost LUNS can be made active by sending the Start Unit Command
> down the scsi path. I have not had time to attempt to use this command,
> and am not sure it can be sent to a Linux scsi device that is showing
> 'Not Ready'(Sense Code) and 'Not Connected'(Inquiry). Other on this
> list may be able to help us in this area. Once you send this command
> down, you will need to wait some amount of time while it flushes IO's
> and changes controllers.
>
> If you get this working i would love to see the results.
>
> Evan
>
>
> On Mon, 2003-08-11 at 16:03, christophe varoqui wrote:
> > Hello,
> >
> > I read your contribution to scsidev, regarding HSV.
> > You seem to have an intimate knowledge of these controlers.
> > Do you happen to have a clue on how to force the activation of a ghost
> > LUN from a Linux host ?
> >
> > The rationale being : in a multipath config, when all active path are
> > exhausted you should be able to activate the ghosts paths rather than
> > let the device die.
> >
> > More generally, how do you manage access to your HSV LUNs ? I personnaly
> > would hate to use SecurePath which locks the user to one distribution
> > and has not passed the "community peer-review test". Any alternative
> > applicable in a dual fabric, dual attached hosts & controlers (4
> > paths/host including 2 ghosts : 2 paths through the left fabric, 2 paths
> > through the right) ?
> --
> -------------------------
> Evan Felix
> Environmental Molecular Sciences Laboratory
> Pacific Northwest National Laboratory
> Operated for the U.S. DOE by Battelle
>
>

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