Improving Storing Efficiency by Increasing Record Size

Files are stored with the greatest efficiency by using the maximum tape record (buffer) size allocated to a given backup device. Performance increases because data transmission is more efficient and because the amount of media used for interrecord gaps decreases.

The maximum tape record size of MPE/iX supported backup devices differs from device to device and is shown in Table 6-2 below:

STORE uses a default record size of 16 kilobytes. To use the maximum record size of the device instead, specify the MAXTAPEBUF parameter of the STORE command.

	NOTE: Do not use the MAXTAPEBUF parameter with a backup device of 32-kilobyte record size if you anticipate restoring the tape to a backup device whose maximum record size is 16 kilobytes.