CA-Librarian question regarding AFOLIBR and DEAD BLOCKS

[JONES, CHARLIE CIV DFAS]

We routinely run the following JCL:

//STATS1 EXEC PGM=AFOLIBR,PARM='NRJS,NJTA'
//SYSPRINT DD SYSOUT=*
//MASTER DD DSN=NCPS.LIBRCM.SRCLIB,DISP=SHR
//OSJOB DD DUMMY,DCB=(RECFM=F,LRECL=80,BLKSIZE=80)
//INDEX DD SYSOUT=*
//SYSIN DD *
-OPT NOSEP,INDEX(S)
-END
/*

After converting all of our datasets to SMS datasets we occasionally
get a few dead blocks (DUE TO PROGRAM ABENDS) when we run the same
JCL.

Is this anything to be concerned about since everything seems to
function
Ok?

See excerpt below for DEAD BLOCKS message

RUN NO. 128 DATE=11/19/09 TIME=1640 MASTER FILE STATISTICAL
SUMMARY
TOTAL NUMBER OF RECORDS - - - - - - - - - 2,994

TOTAL NUMBER OF MODULES - - - - - - - - - - - 89

BLOCKSIZE - - - - - - - - - - - - - - - - 4,096

TOTAL NUMBER OF BLOCKS - - - - - - - - - - - 360

TOTAL NUMBER OF FREE BLOCKS - - - - - - - - 199

TOTAL NUMBER OF USED BLOCKS - - - - - - - - 101

TOTAL NUMBER OF DEAD BLOCKS - - - - - - - - - 60 (DUE TO PROGRAM
ABENDS)
TOTAL NUMBER OF TRACKS (BDAM ONLY)

TOTAL NUMBER OF FREE TRACKS (BDAM ONLY)

TOTAL NUMBER OF INDEX BLOCKS - - - - - - - - - 1

TOTAL NUMBER OF MASTER INDEX ENTRIES - - - - - 1

PERCENTAGE OF FREE SPACE - - - - - - - - - - 55%

PERCENTAGE OF DEAD SPACE - - - - - - - - - - 16%

LARGEST MODULE (IN BLOCKS) - - - - UABND2 (2)

Charlie Jones

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[Hal Merritt]

I've had children, and they've had children since I worked with Librarian :-)

But as best I can remember, a 'dead block' is literally file corruption. I'd be -very- worried.

Even more worried when I see that a large percentage (16%) of your critical database is 'dead'.

Charlie Jones

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[Jeffrey Bruner]

Hi Charlie,

What you are seeing with the reporting of Dead Blocks is expected and normal.

Regards,
Jeff Bruner
L2 CA Librarian