Method and apparatus for providing logical devices spanning seve

Details Method and apparatus for providing logical devices spanning seve Method and apparatus for providing logical devices spanning seve

1997-09-30

2000-11-14

Nguyen, Hiep T

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711149, 711117, 711202, 711153, 711156, 711173, 710 39, 710130, 395500, G06F 1202

Patent

active

061483699

ABSTRACT:
A method and apparatus for providing very large logical volumes (Meta Device) in a storage system is provided. The storage system includes host controllers and disk controllers which communicate through a shared memory. I/O requests are received by the host controller and placed into request queues. The request queues are associated with logical devices. A number of request queues in the host controller are concatenated together to produce the larger logical volume. The large logical volume appears to the host as a single addressable logical unit. I/O requests to the large logical volume are analyzed by the host controller to determine which logical devices are actually needed to service the request. The host controller then makes the appropriate queue entries. Processing of the requests then occurs in the same fashion as if the request had been to a non-Meta Device. This allows the disk controllers and memory to operate without modification.

REFERENCES:
patent: 5457791 (1995-10-01), Matsumoto et al.
patent: 5568629 (1996-10-01), Gentry et al.
patent: 5671439 (1997-09-01), Klein et al.
patent: 5687390 (1997-11-01), McMillan, Jr.
patent: 5809516 (1998-09-01), Ukai et al.

Affiliated with

Also associated with

Rating

Method and apparatus for providing logical devices spanning seve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for providing logical devices spanning seve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for providing logical devices spanning seve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2075756