Christopher A West
Physical Therapy at Juniper Ave, Boulder, CO

6643671, Nov 4, 2003

Aug 27, 2001

09/939150

Michael S. Milillo - Louisville CO
Christopher J. West - Boulder CO
David G. Hostetter - Superior CO
Robert P. Eskenberry - Broomfield CO
Jennifer Johnson - Boulder CO

Storage Technology Corporation - Louisville CO

G06F 1730

707204, 707202, 707203, 711161, 711162, 711165

A system and method for synchronizing a data copy include in one embodiment first and second remote copy trios, each with source, target, and secondary volumes. Source volumes store initial data files, execute write commands to generate updated data files, and generate records of the write commands. Target volumes receive copies of the initial data files and the write command records, and transmit the copies of the initial data files and data indicated by the write command records to secondary volumes. Secondary volumes store the copies of the initial data files and the data indicated by the write command records, which are available for use in generating copies of the updated data files. The target volumes transmit to the secondary volumes in series relative to each other so that consistency is maintained at all times across the source volumes.

6618823, Sep 9, 2003

Aug 15, 2000

09/639652

Christopher West - Boulder CO

Storage Technology Corporation - Louisville CO

H02H 305

714 25, 714 4, 714 43

A method and system for automatically gathering information from different types of devices connected in a network when a device fails includes a network connecting a plurality of different types of devices which communicate with one another across the network. A network controller determines which devices in the network are capable of saving failure information during the time when one of the devices encounters an error. The network controller determines when one of the devices encounters an error. The network controller then gathers the failure information from the devices upon determining that one of the devices has encountered an error.

6345338, Feb 5, 2002

Nov 27, 2000

09/723471

Michael Steven Milillo - Louisville CO
Christopher J. West - Boulder CO

Storage Technology Corporation - Louisville CO

G06F 1208

711137, 711113, 711118, 709 34, 709 39, 709105

A memory system, and a method for controlling prestaging activities based upon the availability of resources within the memory system. Prestage requests are stored in a shared memory accessible to a resource controller and one or more memory controllers. When the resource controller determines that there are sufficient unused cache memory and sufficient unused memory device back-end bandwidth available to prestage at least one data track, a message is broadcast to all of the memory controllers. Those memory controllers with sufficient unused throughput accept the prestage requests and copy the associated data tracks from the memory devices to the cache memory. Counters are maintained in the shared memory to track the number of prestage requests in the process of being serviced, and the number of prestaged data tracks already buffered in cache memory and waiting to be accessed by an external host.

6535967, Mar 18, 2003

Jan 19, 2000

09/488206

Michael Steven Milillo - Louisville CO
David Beal - Tuscon AZ
David Glenn Hostetter - Boulder CO
Christopher J. West - Boulder CO
Peter H. Tallman - Longmont CO
Theresa Lynn Segura - Broomfield CO
Scott Adam States - Arvada CO

Storage Technology Corporation - Louisville CO

G06F 1200

711162, 711161

A method and apparatus for transferring data from a first storage system to a second storage system in which the first storage system includes a first plurality of storage devices and the second storage system includes a second plurality of storage devices. Data is transferred using a pair of devices selected for transferring data for all of the storage devices. Data to be transferred from source storage devices within the first plurality of storage devices is placed or queued on a selected primary storage device within the first plurality of storage devices. The data is sent to a selected secondary storage device within the plurality of storage devices. The data is relocated from the selected secondary storage device to target storage devices within the second plurality of storage devices.

6237008, May 22, 2001

Jul 20, 1998

9/119124

David Grant Beal - Longmont CO
Michael Steven Milillo - Louisville CO
Christopher James West - Boulder CO

International Business Machines Corporation - Armonk NY

G06F 1200

707204

A data storage system includes at least first, second and third virtual storage volumes, the second and third virtual storage volumes being remotely coupled as a PPRC pair to enable a mirroring of data therebetween. The storage system is responsive to a snapshot command from a host processor, to cause transfer of the directory of the first virtual storage volume to the second virtual storage volume. The storage system then invokes a PPRC mirroring procedure which (i) detects an unsynchronized condition between the second and third virtual storage volumes (upon transfer of the directory from the first virtual storage volume to the second virtual storage volume), and (ii) causes a transfer of data, pointed to by the transferred directory, to the third virtual storage volume, until the second and third virtual storage volumes are again in synchronism. This action achieves a synchronization of the first and third virtual storage volumes, while the first virtual storage volume is relieved from certain processing overhead incident to transfer of data to the remotely located third virtual storage volume.

7139874, Nov 21, 2006

Nov 9, 2004

10/984347

Michael S. Milillo - Lousiville CO, US
Christopher J. West - Boulder CO, US

Storage Technology Corporation - Louisville CO

G06F 12/08

711113, 711213, 709219

A client-directed pre-stage operation of a cache memory used to access data blocks from a mass data storage device attached to a host computer through a channel control processor is provided by a method and apparatus comprising a channel control processor for retrieving data blocks from the mass storage device to be pre-staged within the cache memory, a channel interface coupled between the channel control processor and the host computer, a mass storage device interface coupled between the channel control processor and the mass storage device, and a cache memory coupled between the channel interface and the mass storage interface; the cache memory is further coupled to the cache control processor to provide the cache control processor access to data stored within the cache memory. The cache control processor receives a cache bitmap from the host computer to specify the data blocks from the mass storage device to be pre-staged into the cache memory. Each bit within the cache bitmap corresponds to a data block within the mass storage device which may be pre-staged into the cache memory.

6058462, May 2, 2000

Jan 23, 1998

9/012496

Christopher James West - Boulder CO
David Glenn Hostetter - Boulder CO
Michael Richard Crater - Boulder CO
Steven Christopher Fraioli - Arvada CO

International Business Machines Corporation - Armonk NY

G06F 1314, G06F 1100

711162

A system incorporating the invention stores data on communicating disk drives in such a manner as to enable recovery of the data in the event a failure of one of the disk drives. The system includes a first disk drive and a second disk drive, both for storing compressed data records in compressed track formats. Each compressed data record includes a CRC value. A cache stores compressed tracks of data records that are read from the first disk drive and a CRC value is calculated for each stored track of compressed data records. That CRC value is appended to the compressed track. A switch is coupled between the cache, a host processor and the second disk drive for dispatching and receiving tracks of compressed data records between the first disk drive and the second disk drive. The switch includes computational circuitry for calculating a CRC value for each track of compressed data records received from the cache and for determining a match or non-match state with the CRC value appended to each track of compressed data records. In such manner, a system which is primarily adapted to handle records with appended CRC values is adapted to handle tracks of compressed data records with appended CRC values so as to assure data integrity.

7177980, Feb 13, 2007

Dec 18, 2001

10/023321

Michael S. Milillo - Louisville CO, US
David G. Hostetter - Superior CO, US
Christopher J. West - Boulder CO, US
Robert P. Eskenberry - Broomfield CO, US

Storage Technology Corporation - Louisville CO

G06F 12/00, G06F 9/26

711113, 711210

A cache storage system and method are provided for saving storage space in a cache, the system and method for use in a data storage system having multiple storage devices and multiple virtual addresses, each virtual address having a data object associated therewith. Each data object is stored at a storage device location having a unique identifier. The cache storage system and method include a cache for storing a data object associated with at least one virtual address. For a first virtual address, the first virtual address data object is staged into the cache. For a second virtual address, a pointer is generated for use in pointing to the first virtual address data object staged in the cache when the storage device location identifier of the second virtual address data object matches the storage device location identifier of the first virtual address data object.

6088815, Jul 11, 2000

Feb 23, 1998

9/027935

Christopher James West - Boulder CO
David Grant Beal - Boulder CO
Michael Steven Milillo - Louisville CO

International Busines Machines Corporation - Armonk NY

G06F 1300

714 15

A method and system for the automatic data recovery for a duplex pair is provided. The preferred embodiment includes the discovery of lost data on the first subsystem. A copy of the lost data is automatically transferred from the second subsystem to the first subsystem. Then the copy of the lost data is automatically written into the first subsystem. The host processor and the operator is unaware data had been lost. The method and system of the present invention eliminates the need to terminate the job which triggered the discovery of the lost data. It also eliminates the need for any involvement of the operator in the data recovery process.

6912629, Jun 28, 2005

Jul 28, 1999

09/362474

Christopher J. West - Boulder CO, US
David G. Beal - Longmont CO, US

Storage Technology Corporation - Louisville CO

G06F013/00

711161, 711162

A method and system for retrieving data that is stored on a backup or secondary storage system located at a remote location to a local storage system. Restoring of backup data involves the transferring of a point-in-time copy of primary system data from a secondary storage system to the local system. The point-in-time copy is created on the secondary system using an asynchronous remote copy scheme. The point-in-time copy that is restored may be either an entire volume or portions thereof.