To specify an INFDS which contains fields in the input/output feedback section, you can make the following entries:
From = 241 + Offset To = From - 1 + Character_Length Character_Length = Length (in bytes)
For example, for device class of a file, the Information Center gives:
Offset = 30 Data Type is character Length = 2 Therefore, From = 241 + 30 = 271, To = 271 - 1 + 2 = 272. See subfield DEV_CLASS in example below
FFilename++IPEASFRlen+LKlen+AIDevice+.Keywords+++++++++++++++++++++++++++++Comments++++++++++ FMYFILE IF E DISK INFDS(MYIOFBK) DName+++++++++++ETDsFrom+++To/L+++IDc.Keywords+++++++++++++++++++++++++++++Comments++++++++++ DMYIOFBK DS D * 241-242 not used D WRITE_CNT 243 246I 0 * Write count D READ_CNT 247 250I 0 * Read count D WRTRD_CNT 251 254I 0 * Write/read count D OTHER_CNT 255 258I 0 * Other I/O count D OPERATION 260 260 * Cuurent operation D IO_RCD_FMT 261 270 * Rcd format name D DEV_CLASS 271 272 * Device class D IO_PGM_DEV 273 282 * Pgm device name D IO_RCD_LEN 283 286I 0 * Rcd len of I/O