Version: | Volin V21.0A |
The VOLIN (VOLume INitializer) utility routine prepares a disk so that it can be used as a virgin volume in BS2000. Whether the prepared volume is actually new or has already been used in BS2000 or in another operating system is not important. All that matters is that the disk type is supported by BS2000 (see the “System Installation” manual [7 (Related publications)]).
In addition to the label generation, VOLIN allows the mode of use to be defined for a disk. The Data Management System uses this to determine whether the access functions implied by the presence of a PAM key are permitted. If the usage mode is non-key (NK), only NK access methods are allowed.
The volume type is defined by the following characteristics:
DMS PAM key characteristic, i.e. usage type (PK):
key (K) / no key (NK)minimum allocation unit (AU), i.e. size of the smallest file or, more precisely, the smallestunit of memory: 6 Kbytes / 8 Kbytes / 64 Kbytes
minimum transfer unit (TU), i.e. smallest unit of transfer between the disk and main memory: 2 Kbytes
Combinations of these characteristics defined with VOLIN yield the following volume types:
Usage type | Allocation unit | Transfer unit | Abbreviation | For disk type |
|---|---|---|---|---|
K | 6K | 2K | K disk | Private, public |
NK | 6K | 2K | NK2 disk | Private, public |
NK | 8K | 2K | NK2(8K) disk | Public |
NK | 64K | 2K | NK2(64K) disk | Public |