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Disk Device Names?

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The Question is:

I have searched through all the VMS documentation and the following not clear
 to me:
Some documentation refers to disk names as DKA. Other documentaion indicates
 DUA. What is the naming convention for physical local disk drives in VMS?

The Answer is :

  DK is a local SCSI disk prefix, DKA is the first SCSI controller,
  and (somewhat counterintuitively) DKA200: is the third SCSI unit.
  DU is a local or served MSCP-type disk, while DUB is the second
  MSCP controller present.  Disk unit numbers are typically assigned
  at the MSCP storage device or MSCP controller.
  DI disks are the older names for DSSI disks, these devices now
  use the DU device prefix and driver stack on all current releases.
  DV is one of the floppy disk device prefixes.

answer written or last revised on ( 13-SEP-2004 )

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