I just tested backup from both SMS compact dataset and non-sms normal PS
dataset to tape.
The data are same, the normal PS dataset was created by ICEGENER.
I got speed of about 39.24MB/s from normal PS dataset to tape, but 21MB/s from
compact dataset.
By using DAF, I got :
21 VOL=AB0539 CA=6110 DEVTYPE=3490 SIO=156 BR=1 BW=898352
LST=65692
21 VOL=AB0540 CA=6110 DEVTYPE=3490 SIO=12161 BR=1 BW=774929
LST=12161
015 VOL=AB0539 DD=ODD OPE=15.23.04.71 CRTDT=14125 EXPDT=14126 DISP=New
DSORG=PS
RECFM=U NVOL=1 VOL=AB0539 DEVTYPE=3490 EXCP=65653 LTYP=SL FLSQ=1 DEBVL=1
DCBBL=65653 DSSNO=PT0539 STEP=BACKUP PGM=ADRDSSU 14XF1=128 14CIS=18092639
14TKL=49878
015 VOL=AB0540 DD=ODD OPE=15.28.37.31 CRTDT=14125 EXPDT=14126 DISP=New
DSORG=PS
RECFM=U NVOL=1 VOL=AB0540 DEVTYPE=3490 EXCP=12122 LTYP=SL FLSQ=1
DEBVL=1
DCBBL=12122 DSSNO=PT0541 STEP=BACKUP PGM=ADRDSSU 14XF1=128
14CIS=18092639
14TKL=49878
The backup program was ADRDSSU, but it seems no block size was reported by
ADRDSSU.
The OS is z/OS 1.13.
Why can't I have tape block size reported? The only source I can find tape
block size is in IBM RMM.
Both jobs are using 256KB tape block.
Regards
Victor
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