Identifying controller pairs in a dual controller disk array

Details Identifying controller pairs in a dual controller disk array Identifying controller pairs in a dual controller disk array

1995-01-18

1996-09-03

Beausoliel, Jr., Robert W.

Boots, shoes, and leggings

3642384, 364DIG1, 39518203, G06F 1134

Patent

active

055532306

ABSTRACT:
In a disk storage system having dual controllers and mirrored memory therebetween, a controller identification system provides a unique system identifier (ID) data (number, password, etc.) accessible by both controllers for determination of which controller is MASTER. This identifier is physically mounted in a location that will always remain with the disk array and will always remain accessible by the controllers. Typically, a read-only memory (ROM) stores the identifier. During initialization, each controller reads this system identifier and compares it to a respective controller identifier previously stored in a non-volatile memory area of each controller. If the system identifier matches the controller identifier, the controller has not been moved and, therefore, has a valid memory image and may have previously been a MASTER controller. A MASTER bit signal is then checked; and, if it is set, the controller was previously the MASTER controller and will continue as MASTER controller. If the identifiers do not match, the controller is a new arrival and the system identifier is stored in the controller non-volatile memory for reference upon the next initialization.

REFERENCES:
patent: 4688172 (1987-08-01), Wright
patent: 4958270 (1990-09-01), McLaughlin et al.
patent: 5140592 (1992-08-01), Idleman et al.
patent: 5155835 (1992-10-01), Belsan
patent: 5195100 (1993-03-01), Katz et al.
patent: 5237658 (1993-08-01), Walker et al.
patent: 5278838 (1994-01-01), Ng et al.
patent: 5287462 (1994-02-01), Jibbe et al.
patent: 5289418 (1994-02-01), Youngerth
patent: 5297258 (1994-03-01), Hale et al.
patent: 5379417 (1995-01-01), Lui et al.
patent: 5437022 (1995-07-01), Beardsley et al.

Affiliated with

Also associated with

Rating

Identifying controller pairs in a dual controller disk array does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Identifying controller pairs in a dual controller disk array, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identifying controller pairs in a dual controller disk array will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1958808