Browse Prior Art Database

Removable Hard-Disk Hierarchical Storage Manager Library

IP.com Disclosure Number: IPCOM000117678D
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Solan, M: AUTHOR [+2]

Abstract

Personal Computer (PC) customers desire removable media for storing large amounts of data. They also want this in a library, so that they are not inundated in large amounts of loose data cartridges. Finally, they want the speed of hard disk.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 89% of the total text.

Removable Hard-Disk Hierarchical Storage Manager Library

      Personal Computer (PC) customers desire removable media for
storing large amounts of data.  They also want this in a library, so
that they are not inundated in large amounts of loose data
cartridges.  Finally, they want the speed of hard disk.

      Proposed is a library configured with removable Hard Disk
Drives (HDD).  The storage cells of the library would contain
removable hard disks either with or without cartridges.

      1 GB removable media cartridges cost about $100 and the hard
disk drives for these removable cartridges cost about $500.  Thus,
the cost of the removable media is comparable to banded optical
media.  However, the cost of the associated hard disk drives
themselves is substantially lower than optical drives.  Also, one
gets the seek, latency, and I/O performance of hard disk rather than
optical.

      In summary, we are saying that for the same price as an optical
library, one could have hard disk performance via a removable hard
disk library.

      What we claim as inventive is a library of removable hard disk
media with one or more removable hard disk drives.  This library
could also contain CD-Recordable (CDR) or CD-Erasable (CDE) media and
drives.  The mixture of CD media/drives in relation to the removable
hard disk media/drives could be determined by a linear programming
algorithm which minimizes the cost of the library within the
constraints of (a) dai...