公开(公告)号：AT347707T

公开(公告)日：2006-12-15

申请号：AT02743457

申请日：2002-07-26

Applicant: IBM

Inventor： DAY KENNETH FAIRCLOUGH III ,  DEWEY DOUGLAS WILLIAM

IPC: G06F3/00 ,  G06F3/06 ,  G06F12/00 ,  G11B15/68 ,  G11B27/00 ,  G11B27/34

Abstract: Emulation of a small computer system interface (SCSI) library storage is provided in a virtual data storage subsystem having an automated tape library. This allows the ability to access or store a logical volume of data. Medium changer commands as used in SCSI and other open system interfaces are mapped to library function commands as commonly used in an enterprise server environment. This allows full transparent usage of virtual tape storage available in the enterprise server environment as open system storage.

公开(公告)号：AU2002321460A1

公开(公告)日：2003-03-24

申请号：AU2002321460

申请日：2002-08-14

Applicant: IBM

Inventor： DAHMAN KIRBY GRANT ,  JESIONOWSKI LEONARD GEORGE ,  BASHAM ROBERT BEVERLEY ,  DAY KENNETH FAIRCLOUGH III

IPC: G06F3/06 ,  G06F13/00 ,  G11B15/68 ,  G11B17/22

Abstract: Data storage drives of an automated data storage library are allocated to received requests. A drive resource provider (35), upon receiving a request for a drive when all of the drives of the pool are allocated, holds any mount of a portable data storage cartridge relative to the request, releasing the hold when a drive is allocated. Spare drives are provided, outside of the pool. A spare drive may be allocated in response to the request, and a message is posted indicating use of the spare data storage drive. The posted message may comprise a notification that action may be taken to permanently transfer a spare data storage drive to the pool. Furthermore drive image providers of a virtualization system for an automated data storage library provide an image of a fixed plurality of virtual data storage drives with fixed identifications to a host application. A drive resource provider (35), at any one time, assigns any number "m" of a pool of "n" drives to the drive image providers, and "n" - "m" of the pool are freed and available for assignment. The drive resource provider (35) responds to a triggering event requesting a drive, and dedicates one of the "n" - "m" drives of the pool to the virtual drive. The drive image provider (30) characterizes and directs communication between the host and the dedicated drive as a fixed virtual drive; and prior to the dedication of a drive, characterizes the virtual drive to the requesting host application as "not ready".