US 2020/0026453 A1Published application

Method and system for dynamically expanding a storage system

AssigneeUnisys Corporation

InventorsMICHAEL J RIESCHL, LINDA J BROCK

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Abstract

A method and system for migrating data from a source mass storage device to a destination mass storage device within a system, The method includes changing the destination mass storage device from an unavailable for operation (DN) state to a reserved for data migration (RV) state, performing a disk copy operation from the source mass storage device to the destination mass storage device, changing the destination mass storage device from the reserved for data migration (RV) state to an available for operation (UP) state, changing the source mass storage device from an available for operation (UP) state to an unavailable for operation (DN) state, performing an Expand Disk operation within the destination mass storage device to expand the size of data storage capacity of the destination mass storage device from the smaller data storage capacity of the source mass storage device, and removing the source mass storage device from the system.

Claims19

Dependent claims

A method for migrating data from a source mass storage device to a destination mass storage device within a system, wherein the data storage capacity of the destination mass storage device is greater than the data storage capacity of the source mass storage device, wherein the source mass storage device is in an available for operation (UP) state, the method comprising:

changing the state of the destination mass storage device from an unavailable for operation (DN) state to a reserved for data migration (RV) state;
performing a disk copy operation from the source mass storage device to the destination mass storage device, wherein the disk copy operation migrates data from the source mass storage device to the destination mass storage device, and wherein the destination mass storage device takes on the smaller data storage capacity of the source mass storage device;
changing the state of the destination mass storage device from the reserved for data migration (RV) state to an available for operation (UP) state;
changing the state of the source mass storage device from the available for operation (UP) state to an unavailable for operation (DN) state;
performing an Expand Disk operation within the destination mass storage device, wherein the Expand Disk operation expands the size of data storage capacity of the destination mass storage device from the smaller data storage capacity of the source mass storage device;
and
removing the source mass storage device from the system.

4 more elements

A method for dynamically expanding a destination mass storage device during a data migration from a source mass storage device to the destination mass storage device within a system, the method comprising:

determining a maximum number of tracks within the destination mass storage device to expand the destination mass storage device;
creating a new master bit table (MBT) file based on the maximum number of tracks within the destination mass storage device to expand the destination mass storage device, wherein the new master bit table file describes a new expanded area of the destination mass storage device;
allocating in the new expanded area of the destination mass storage device a new master bit table based on the new master bit table file, wherein the new master bit table includes a plurality of tracks;
updating the field maximum capacity in the destination mass storage device based on the new expanded area of the destination mass storage device;
and
converting the plurality of tracks of the new master bit table to a plurality of master file directory file (MFDF) sectors, wherein the plurality of MFDF sectors represent an expanded data storage area within the destination mass storage device.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/041,909Filed 23 Jul 2018
Published: 23 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 3/0647
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: migration mechanisms
G06F 3/0604
Specifically adapted to achieve a particular effect: improving or facilitating administration, e.g. storage management
G06F 3/0634
Configuration or reconfiguration of storage systems: by changing the state or mode of one or more devices
G06F 3/0673
In-line storage system: single storage device