One more thing about this option.  It is for V2 only.  In V3, DLT drive will
always use 256K block sizes.

Craig Bell

>> This option was introduced in ptf-15 to allow certain devices to use a 256k
block instead of 32k (on new/empty tapes only- no mixing allowed).  The only
supported device this applies to at this time is DLT drives.  Some drives have
always used 256K, ie.  3590, 3570, DTF.

>> If you have problems with restore db using this option, contact service.

>> Craig Bell