Ultera Systems | Stor2™ - Dual Optical Library

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	Related
	RapidStor
	RAILStor
	Stor2

	Dual Channel
	Optical Imager2
	Optical Imager3

Ultera's Stor2™ controller solution is designed for a dual optical library configuration featuring Data Mirroring (RAID Level 1) for applications requiring fault tolerance and/or disaster recovery.

SOLUTIONS

	Dual optical jukebox mirroring
	Ideal for disaster recovery applications
	Support two jukeboxes with two drives each
	Combines RAID and automation with seamless scalability
	Operations continue in the event of a drive or media failure

Dual Channel
Low Cost Data Mirroring

Ultera's dual channel Stor2� controller features Data Mirroring and appears to the host system as a single optical library with one or more optical drives ("Logical Drive Sets"). A "Logical Drive Set" consists of an array of 2 optical drives and is seen by the host as a single logical optical device ("Virtual Optical Drive"). The Stor2� Mirroring controller supports creating 2 "EXACT" original optical media copies simultaneously. Productivity is increased for applications that require duplicating original master optical media.


Supports DVD-RAM & Magneto Optical, MO Devices

How Does Ultera's Stor2™ Controller Work?

Ultera's Library Optical RAID solutions are designed to be plug and play compatible with all operating systems and hardware platforms. Ultera's Stor2™ controller adds value to your optical library investment by providing data protection and fault tolerance at a level that no single optical library can provide. A description of how the Stor2™ controller transparently applies Optical RAID enhancements to conventional optical libraries is detailed below.

ROBOTICS
The Stor2™ operating mode is Mirroring 2 and has a "Logical Drive Set" and a "Logical Optical Volume" size equal to 2. The Stor2™ controller presents to the host backup management software the same inventory, number of drives and number of import/export slots as if it was a single optical library.

INVENTORY
The Stor2™ controller presents each logical optical volume set to the host computer as a single media cartridge and transparently loads and unloads a complete physical set of optical media cartridges for each logical mount/dismount request from the backup management software.

Starting with the lowest slot number, a logical optical volume set occupies the same slot number in each library. For example, two independent optical libraries attached to a Stor2™ controller has a logical drive set size equal to 2 and data is mirrored across the optical libraries to the appropriate drive set.

DRIVES
The host software views each logical drive set as a single optical drive via the Stor2™ controller. The array channels of the primary Stor2™ controller attach to a robot and the lowest drive element address in each optical library. Additional Stor2™ controllers may be added to operate the next set of available drives(1 per optical library).

IMPORT/EXPORT
The Stor2™ controller presents the same number of door slots that exist in a single optical library. When a logical optical volume set is imported/exported, the Stor2™ controller moves an entire logical optical set in parallel to the door or from the door as one logical move operation.