Computing.Net - f$getdvi - Lexical function query.

Subject: f$getdvi - Lexical function query.

Original Message

Name: Rodney Bewes
Date: October 21, 2001 at 20:30:57 Pacific
Subject: f$getdvi - Lexical function query.

Comment:

hi,
running the command: sh dev 'disk id'
shows a mount count (mnt cnt) of 2
but when running:
write sys$output f$getdvi("disk id","mountcnt") only displays 1
any ideas why this is?
r

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Response Number 1

Name: klaus
Date: October 23, 2001 at 23:24:04 Pacific
Subject: f$getdvi - Lexical function query.

Reply: (edit)

Hi Rodney,
I think this effect appears if you are in a cluster and the device is mounted more than once from different machines.
Klaus

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Response Number 2

Name: Rodney Bewes
Date: October 27, 2001 at 03:54:47 Pacific
Subject: f$getdvi - Lexical function query.

Reply: (edit)

apologies as i do not appear to have explained this very clearly. yes, these are clustered mounted disks which is highlighted by the 'mnt cnt' status of the 'sh dev' command. my query is although a disk is displaying a 'mnt cnt' of 2 running the 'sh dev' command this same disk only show a 'mount count' of 1 running 'write sys$output f$getdvi("disk id","mountcnt"). why is this?
r

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Response Number 3

Name: Phil Piotrowski
Date: November 15, 2001 at 08:11:23 Pacific
Subject: f$getdvi - Lexical function query.

Reply: (edit)

MGMT52. Why do $GETDEV MOUNTCNT and SHOW DEVICE mount counts differ?
MOUNTCNT returns the local mount count, while SHOW DEVICE returns
the cluster-wide mount count.

Per www.Openvms.compaq.com OpenVMS Wizard
(not me)

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Response Number 4

Name: rodney
Date: November 17, 2001 at 17:00:11 Pacific
Subject: f$getdvi - Lexical function query.

Reply: (edit)

phil,
thanks. so how can i check if a disk is mounted on more than one system within a command procedure?
r

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Response Number 5

Name: tez
Date: December 4, 2001 at 03:10:03 Pacific
Subject: f$getdvi - Lexical function query.

Reply: (edit)

r
noticed this myself a while ago. reading the system service manual it seems intended behaviour (does it make sense? can you mount a disk more than once locally?)
The only way I know to obtain the info is to grep/parse it from the show device output. More info can be obtained from the "also mounted on" part of show device/full
regards, tez

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Response Number 6

Name: rodney bewes
Date: February 26, 2002 at 18:06:03 Pacific
Subject: f$getdvi - Lexical function query.

Reply: (edit)

using dcl not unix unfortunately. any ideas how to extract specific data from a commands output? i would need to extract the last character from the sh device disk_name command. is this possible using dcl?
r

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