> The subsequent several copies ran much faster and also took about 10 minutes.
But it was a much faster 10 minutes? Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Mike Schwab Sent: Monday, May 22, 2017 10:08 PM To: [email protected] Subject: Re: SDB (system determined Blksize) Every time you deal with a block you execute a bit of code to deblock the records. To fill a Mod 9 volumes to test TDMF I copied a large dataset with a small block size to a dataset with half track blocking on a spare volume, then copied the first data set to several other datasets to fill the volume. The first copy to the half track blocksize took about 10 minutes. The subsequent several copies ran much faster and also took about 10 minutes. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
