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Anticipated Mounting of Compact Disk-Read Only Memory Disks based on Selected Application-Icons

IP.com Disclosure Number: IPCOM000117464D
Original Publication Date: 1996-Mar-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 6 page(s) / 175K

Publishing Venue

IBM

Related People

Hocker, MD: AUTHOR [+4]

Abstract

This article permits users to allow the anticipatory demounting and mounting of Compact Disk-Read Only Memory (CD-ROM) disks in a stack of disks in an automated CD-ROM library based on the application GUI icon selected by the user. This would tend to keep the mechanical mount and spinup times transparent to the user and the application related material on the CD-ROM disk would appear online.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 39% of the total text.

Anticipated Mounting of Compact Disk-Read Only Memory Disks based
on Selected Application-Icons

      This article permits users to allow the anticipatory demounting
and mounting of Compact Disk-Read Only Memory (CD-ROM) disks in a
stack of disks in an automated CD-ROM library based on the
application GUI icon  selected by the user.  This would tend to keep
the mechanical mount and  spinup times transparent to the user and
the application related material  on the CD-ROM disk would appear
online.

      Essentially, a strength matrix is kept of all CD-ROMs in the
library and which applications could use them.  In it's basic form,
the strength matrix has binary Yes/No elements.  In the preferred
embodiment, the elements of the strength matrix have scores based on
the usage of the CD-ROM disks by the applications.  This would allow
the selection of the Most Frequently Used (MFU) or Most Recently Used
(MRU) disks to be mounted in anticipation of the needs of the user.
When anticipated correctly, the already mounted disk will have a
"dedicated" online performance as seen by the user, even though that
disk may be demounted as other applications are selected by the user.

      In Fig. 1, a general optical library 100 has one or more bins
or stacks 110 for the storage of the optical cartridges 120 which
contain optical disks 121.  Alternately, the optical disks 121 may be
stored without benefit of an external cartridge.  Either way, a
robotic picker 130 can pick the cartridge 120 or disk 121 from a bin
or stack, transport it to a I/O device 140, and put it in the device
for I/O activity.  When I/O activity ceases, the robotic picker 130
can reverse it's previous steps and empty the I/O device, transport
the cartridge or disk back to a storage slot, and put it there for
storage.

      Library 100 may be externally connected to a host PC 150 via
BUS 155 or the library may actually be internal to the PC itself.
Either way, the host PC may send commands to the library and retrieve
data from disks in the library.

      If a user selects the icon 160 at the front-of-screen window
166, then one or more CD-ROM disks could be mounted in the library,
depending on the number of I/O devices available and the number of
disks eligible for mounting.  The choice of which disk(s) to mount
and in what order to mount them would be made on a Most Frequently
Used (MFU) or Most Recently Used (MRU) criteria.

      The flowchart 200 of this activity is described in Fig. 2.  In
step 202, the front of screen is checked to see if the user has
selected an application icon.  The user may select this icon via a
mouse, vocal command, keyboard activity, light pen, or other suitable
means.  If no application was selected, then the flowchart moves to
step 203, a housekeeping step.  In 203, a check is made for inactive
devices, devices which have not been used for T seconds or longer.
If there are such devices, one is emptied in step 204. ...