[Info-vax] Uptime for OpenVMS

[Robert A. Brooks]

On 5/13/2011 10:35 PM, Michael Moroney wrote:
> JF Mezei<jfmezei.spamnot at vaxination.ca>  writes:

>> Doesn't it also check to properly close files (and update various
>> pointers) that were not closed if the disk was improperly dismounted ?
>> If that is not "mount verification", what is that process called ?
>
> Mount Verify gets invoked if a drive goes offline when trying to do I/O
> to it.  It attempts to bring the disk back online, including alternate
> path searches (DU/MSCP),

Similar to DUDRIVER "connection walking", Multipath for fibre channel 
and SCSI devices is invoked as part of mount verification.

It's kinda fun to look at [SYS]MOUNTVER.MAR from VAX/VMS V1.0 and see
how simple it was, compared to the complexity of what happens today, 
which isn't even the full story, as other areas play a role in mount 
verification (DKDRIVER, SHDRIVER for shadow sets).

                                    -- Rob