Mark A Longo

US Patent:

49032186, Feb 20, 1990

Filed:

Aug 13, 1987

Appl. No.:

7/084930

Inventors:

Mark Longo - Nashua NH
Steven D. DiPirro - Holliston MA

Assignee:

Digital Equipment Corporation - Maynard MA

International Classification:

G06F 3037

US Classification:

364521

Abstract:

A method and an apparatus for emulating a console at a graphics workstation terminal uses a second central processing unit to perform the console emulation. A windowing system operating on a first central processing unit interfaces with the operation of the console from the second central processing unit to provide non-destructive console emulation at the workstation terminal. The windowing system maintains a separate console window that the second central processing unit can access transparently to the other windows. The first or host cpu can still perform graphics functions while the second cpu operates the console.

US Patent:

20170177224, Jun 22, 2017

Filed:

Dec 21, 2015

Appl. No.:

14/975971

Inventors:

- Redwood Shores CA, US
Mark Longo - Dunstable MA, US
Joshua Smith - Brookline NH, US

International Classification:

G06F 3/06

Abstract:

Techniques are provided for efficiently managing multi-tier storage systems with multiple types of storage class tiers encompassed in a single tiered range volume. In an embodiment, a storage manager creates a first virtual volume, where the storage manager exposes to a first tiered range volume client a first virtual address range for the first virtual volume that represents logical addresses of data blocks within storage portions from at least two storage class tiers of a set of multiple storage class tiers. Each storage portion represents an allocated range from a storage class tier. A storage class tier represents a set of multiple storage devices. The storage manager maintains a storage map of storage portions from multiple storage class tiers to the first virtual address range within the first virtual volume which includes mapping a first virtual address to a first logical address within a first storage portion from a first storage class tier and mapping a second virtual address to a second logical address within a second storage portion from a second storage class tier. A tiered range volume client of the first virtual volume stores a first data block at a first address within the first storage portion. Then the storage manager adds a third storage portion from a third storage class tier to the first virtual volume that maps to a third allocated range, where the third allocated range of the first virtual volume covers at least a portion of the first allocated range, including the first address where a first data block is stored. When adding a third storage portion, the storage manager modifies the storage map to map the first virtual address for the first data block to a location within the third storage portion. The storage manager then moves the first data block to the third storage portion within the third storage class tier that corresponds to a location corresponding to the first address within the third storage portion.