From:	CRDGW2::CRDGW2::MRGATE::"SMTP::CRVAX.SRI.COM::RELAY-INFO-VAX" 17-NOV-1989 12:54
To:	MRGATE::"ARISIA::EVERHART"
Subj:	Re: Cancelling Mount Verify Timeout

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Date: 17 Nov 89 16:46:30 GMT
From: rpi!usenet@tcgould.tn.cornell.edu  (Matt Madison)
Organization: Rensselaer Polytechnic Institute, Troy, NY
Subject: Re: Cancelling Mount Verify Timeout
Message-Id: <0092DEB8.F3CE7B60@mdmvs.ecs.rpi.edu>
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In article <891117103139.20c020ea@NSSDCA.GSFC.NASA.GOV>,
  TENCATI@NSSDCA.GSFC.NASA.GOV (SPAN SECURITY MGR. (301)286-5223) writes:
>Does anyone know the low-level magic one types on the console to cause
>mount-verify timeout to be cleared for a particular disk drive?

It's the IPL 12 interrupt service routine that does this.  To activate
it, deposit the value 12 (0C hex) into the SIRR (internal processor
register number 20 [14 hex]).  The way to do this probably varies from
CPU to CPU, depending on the console command language.  On a 6000-series
machine, for example, you would do:

    >>> D/I 14 0C

This will get you the IPL 12 ISR prompt:

    IPC>

at which you can type:

    C ddcu:       cancels mount verification on specified device
    Q             forces quorum recalculation for the VAXcluster
    X             activates XDELTA if it is resident
    ctrl/Z        returns system to normal operation

Use At Your Own Risk.  This stuff is documented in the VMS Internals and
Data Structures V5 Update XPRESS (not sure which volume).
--
Matthew Madison, Systems Programmer  | 
Engineering Computing Services       |
Rensselaer Polytechnic Institute     |
Troy, New York 12180-3590 USA
   madison@vms.ecs.rpi.edu