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December 1999, Week 5

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Subject:
When is a modification not a modification?
From:
Patrick Santucci <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Fri, 31 Dec 1999 10:15:09 -0600
Content-Type:
text/plain
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text/plain (79 lines) 
This is plain weird. I have a file I had to clear out, so I did the
following (hope nothing wraps too badly):

SYSB [/TS/PSANTUCC]: listf mitasbil.data.ltc,3
********************
FILE: MITASBIL.DATA.LTC

FILE CODE : 0                   FOPTIONS: ASCII,FIXED,NOCCTL,STD
BLK FACTOR: 1                   CREATOR : **
REC SIZE: 1602(BYTES)           LOCKWORD: **
BLK SIZE: 1602(BYTES)           SECURITY--READ    : ANY
EXT SIZE: 0(SECT)                         WRITE   : ANY
NUM REC: 10      <<<<< Note # recs        APPEND  : ANY
NUM SEC: 272                              LOCK    : ANY
NUM EXT: 3                                EXECUTE : ANY
MAX REC: 200000                         **SECURITY IS ON
                                FLAGS   : NO ACCESSORS
NUM LABELS: 0                   CREATED : FRI, OCT 15, 1999,  8:00 AM
MAX LABELS: 0                   MODIFIED: WED, DEC 29, 1999,  8:46 PM
                                          ^^^^^ Note date/time ^^^^^^
DISC DEV #: 116                 ACCESSED: THU, DEC 30, 1999,  5:17 PM
SEC OFFSET: 0                   LABEL ADDR: **
VOLCLASS  : ALPHA_SET:DISC


SYSB [/TS/PSANTUCC]: fcopy from=$null;to=MITASBIL.DATA.LTC
HP31900A.05.02 FILE COPIER (C) HEWLETT-PACKARD CO. 1990

*200*WARNING: FROMFILE RECSIZE IS 0 WORDS, TOFILE RECSIZE IS 1602 BYTES.
CONTINUE OPERATION (Y OR N) ?y
*201*WARNING: FROMFILE IS  BINARY, TOFILE IS ASCII
CONTINUE OPERATION (Y OR N) ?y
*143*WARNING: FROMFILE IS EMPTY

0 RECORDS PROCESSED *** 0 ERRORS


END OF SUBSYSTEM
SYSB [/TS/PSANTUCC]: do lis
SYSB [/TS/PSANTUCC]: listf mitasbil.data.ltc,3
********************
FILE: MITASBIL.DATA.LTC

FILE CODE : 0                   FOPTIONS: ASCII,FIXED,NOCCTL,STD
BLK FACTOR: 1                   CREATOR : **
REC SIZE: 1602(BYTES)           LOCKWORD: **
BLK SIZE: 1602(BYTES)           SECURITY--READ    : ANY
EXT SIZE: 0(SECT)                         WRITE   : ANY
NUM REC: 0    <<<<< Different! (0 <> 10)  APPEND  : ANY
NUM SEC: 272                              LOCK    : ANY
NUM EXT: 3                                EXECUTE : ANY
MAX REC: 200000                         **SECURITY IS ON
                                FLAGS   : NO ACCESSORS
NUM LABELS: 0                   CREATED : FRI, OCT 15, 1999,  8:00 AM
MAX LABELS: 0                   MODIFIED: WED, DEC 29, 1999,  8:46 PM
                                          ^^^^^^^^^ Same!! ^^^^^^^^^^
DISC DEV #: 116                 ACCESSED: FRI, DEC 31, 1999,  9:21 AM
SEC OFFSET: 0                   LABEL ADDR: **
VOLCLASS  : ALPHA_SET:DISC


SYSB [/TS/PSANTUCC]:

Note that the NUM REC changes, as does the ACCESSED date and time, but
MODIFIED date and time doesn't! How can this be? Doesn't wiping out the
contents of a file qualify as a "modification" to the file? Shouldn't it?
What am I missing?

We're on MPE 5.5 PP6 + Y2K patches.

Patrick

P.S. I can only get e-mail for about two more hours, then they're shutting
it off till Sunday. :(  Thank goodness for the archives!
--
Patrick Santucci
Technical Services Analyst
KVI, a division of Seabury & Smith, Inc.

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