Pegasus Optical File System for Microsoft Windows NT

HTCE Home      E-mail us      Product Information      Specifications        New Accounts

Product Information
From health care to insurance to government agencies to the news media — organizations with data-intensive processes are increasingly searching for a reliable storage method for their mission critical files. Optical storage offers an effective solution, yet the key is to make certain that the system you choose today will work for your organization tomorrow.

The Pegasus Optical File System for Microsoft NT is a complete file system and volume manager designed specifically for optical technology that makes it easy to maintain a dependable data archive.

This highly flexible software allows you to efficiently store and retrieve vast amounts of electronic information. The Pegasus-OFS™ assures optical data cartridge interchangeability between unlike host operating systems, eliminating the need for costly data conversion when migrating in the future -- preventing obsolescence. The files you save today will be easily accessible in five, ten, or even fifty years from now. And as your company’s storage needs expand, you will find that the Pegasus-OFS makes it both easy and cost-efficient to migrate from standalone drives to low-end jukeboxes to high-end systems.
 

Key Features

• Easy Access to Data

The Pegasus-OFS is designed to allow operating systems within high-performance, high-volume applications to access optical storage devices as easily as a magnetic hard drive or floppy disk drive. In effect, by assigning a drive letter to the optical hardware, it provides simple data access and treats each optical disk as a volume, and each side of a disk as a subdirectory.
 

• Physical Clustering Saves Time and Money

Because each disk surface is directly accessible through the file system, related data can be easily clustered together. With the Pegasus interface, it is also simple to reserve space on an optical disk for adding related data later. This means faster retrieval times, increasing user satisfaction, and far less "thrashing" of the jukebox, reducing costly hardware service calls.

• Full 32-bit multi-threaded, multi-tasking file system kernel
• User configurable drive swapping parameters
• Single drive letter access to multiple volumes
• Combine jukeboxes and standalone drives
• Combine jukebox types
• Combine drive types
• User configurable performance tuning
• Supports asynchronous read-ahead algorithms
• Support for network access via Windows NT and OS/2
• OFS directory and File services are available through NT 3.51 & 4.0 for Microsoft Windows for Workgroups, Windows 95, Windows-NT clients, IBM OS/2 v2.x, 3.x WARP & WARP Connect

• The 32-bit kernel provides full multi-tasking capabilities; access for up to 1000 users with only one server.
• Intelligently queues requests to increase performance while reducing wear on optical hardware
• Extensive volume management automatically tracks data on-line (in the optical drive), near-line (in the jukebox), or even off-line (at the warehouse).
• Multiprocessing on the server allows you to mount and unmount disks, set drive parameters, and report errors without disrupting the file server.
• The Pegasus-OFS is designed to support industry-standardized file formats on various optical media including CD-based, WORM, and Rewritable.
• The software is transparent to the user and can be easily added to an existing computer system.

• DOS NetWare Clients v3.1x, v4.1x (with Microsoft File & Print Services for Netware Utilities)
• Microsoft Windows 3.1x
• Windows for Workgroups
• Windows 95
• Windows NT v3.51 & v4.0 Workstation
• OS/2 WARP v3.0 & v4.0

We offer both the Multiple Drive Management Interface (MDMI) for optical drives and Rapid Changers and the Optical Jukebox Management Interface (OJMI) for optical jukeboxes.

Both software packages are compatible with virtually all the optical hardware provided by the industry’s leading manufacturers. OJMI handles combinations of WORM, Rewritable, and CD-based drives and jukeboxes, allowing daisy-chaining of multiple optical drives, jukeboxes, and drive/jukebox combinations. Multiple SCSI host adapter support is also available. And as your company’s storage needs expand, you will find that the Pegasus-OFS makes it both easy and cost-efficient to migrate from standalone drives to low-end jukeboxes to high-end systems.
 

Hardware and Software Requirements

• 48 MB DASD for Page File (this does not include NT’s requirements for Page File)
• At least 10 MB DASD storage per volume for directory caching/optimization
• 20 MB of free DASD storage
• Intel 486 33 MHz or better
• 16 MB memory (additional memory improves performance)
• Adaptec or Bus Logic SCSI Host Adapter
• NT Version 3.51 or 4.0
• RAM Recommendations: Application Dependent, Contact Pegasus Support

Specifications for the Pegasus-OFS-NT

Number of subdirectories per volume	65,000
Number of files per subdirectory	No set limit
File name length	19 characters
Number of off-line volumes per server	65,000
Number of users	1,000
Number of volumes per disk side	1
Number of on-line volumes per server	Unlimited
Number of concurrent tasks	1,000
Number of open file handles	1,000
Number of files per volume	No set limit

 
Back to the top of this page