That's also my understanding, but SDB had chosen blocksize which is not
the largest possible.
That raises my doubts.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2011-07-21 06:38, Mike Schwab pisze:
Tapes are pretty linear. The larger the blocksize, the fewer the
blocks to write. And each
W dniu 2011-07-21 16:04, Yifat Oren pisze:
Hi Radoslaw,
In Using Data Sets it says that the optimum BLKSIZE for 3590 is: 262 144 (256 KB)
except on some older models on which it is 229 376 (224 KB) ..
Your device seems to fall into the 2nd category for some (wrong?) reason..
This is
Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of
R.S.
Sent: יום ד 20 יולי 2011 17:03
To: IBM-MAIN@bama.ua.edu
Subject: SDB (optimal?) BLKSIZE on tape device
(SDB - System Determined Blocksize)
I just coded LRECL=80,BLKSIZE=0,BLKSZLIM=2G on MDL tape device in 3590 mode.
I noticed something
(SDB - System Determined Blocksize)
I just coded LRECL=80,BLKSIZE=0,BLKSZLIM=2G on MDL tape device in 3590
mode.
I noticed something strange for me: SDB was 229360B, but it's NOT the
largest block available! The device also accepted BLKSIZE=262080 (the
largest multiple of 80 less than
Tapes are pretty linear. The larger the blocksize, the fewer the
blocks to write. And each block has a bit of overhead to it.
2011/7/20 R.S. r.skoru...@bremultibank.com.pl:
(SDB - System Determined Blocksize)
I just coded LRECL=80,BLKSIZE=0,BLKSZLIM=2G on MDL tape device in 3590 mode.
I
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