Patent application number | Description | Published |
20090196540 | DYNAMIC FLUID PRESSURE BEARING, SPINDLE MOTOR, DISK DRIVE APPARATUS AND METHOD FOR MANUFACTURING THE DYNAMIC FLUID PRESSURE BEARING - A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface. | 08-06-2009 |
20100296190 | FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - A fluid dynamic bearing apparatus includes a first minute gap, a second minute gap, a third minute gap, a fourth minute gap, and a fifth minute gap. A flow of a lubricating oil from the fifth minute gap to the fourth minute gap is caused by a plurality of dynamic pressure generating grooves arranged within the fluid dynamic bearing apparatus. This flow causes air bubbles mixed in the lubricating oil within the fifth minute gap to flow toward the third minute gap and be discharged to an outside through the third minute gap. In addition, a flow of the lubricating oil into the third minute gap caused by a centrifugal force accompanying rotation is inhibited. | 11-25-2010 |
20110019303 | FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - In a spindle motor, a capillary seal portion having a radial dimension that decreases in an axially downward direction, and a labyrinth seal portion arranged above the capillary seal portion are defined between an outer circumferential surface of a rotating member and an inner circumferential surface of a tubular portion. The capillary seal portion includes a liquid surface of a lubricating oil positioned therewithin. The radial dimension of the labyrinth seal portion is smaller than the radial dimension of an upper end portion of the capillary seal portion, so that the labyrinth seal portion contributes to reducing evaporation of the lubricating oil. | 01-27-2011 |
20120063030 | FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - In a fluid dynamic bearing apparatus, an oil buffer is defined between a thrust gap and a pumping gap. The oil buffer has an axial dimension greater than that of the thrust gap, and/or has a radial dimension greater than that of the pumping gap. An air bubble generated in the thrust gap due to cavitation, for example, when a fluid dynamic bearing apparatus experiences a vibration can be dissolved in lubricating oil provided within the oil buffer. This prevents leakage of the lubricating oil due to the air bubble residing in the fluid dynamic bearing apparatus. | 03-15-2012 |
20120092788 | FLUID DYNAMIC BEARING MECHANISM INCLUDING COMMUNICATING CHANNEL, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - A fluid dynamic bearing mechanism includes a stationary bearing portion including a sleeve portion, and a rotating bearing portion including an outer rotating portion. A lubricating oil is arranged between the stationary and rotating bearing portions. A first dynamic pressure groove array is arranged in an upper surface of the sleeve portion or a lower surface of the outer rotating portion. A second dynamic pressure groove array is arranged in a surface of the outer rotating portion or a surface of the stationary bearing portion in a region between the first array and a liquid surface. An end of the second array closer to the liquid surface is arranged radially inward of an opposite end of the second array. An upper end opening of a communicating channel defined in the sleeve portion is arranged radially outward of a radially inner end of the first array. | 04-19-2012 |
20130243356 | FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - A fluid dynamic bearing apparatus includes a first minute gap, a second minute gap, a third minute gap, a fourth minute gap, and a fifth minute gap. A flow of a lubricating oil from the fifth minute gap to the fourth minute gap is caused by a plurality of dynamic pressure generating grooves arranged within the fluid dynamic bearing apparatus. This flow causes air bubbles mixed in the lubricating oil within the fifth minute gap to flow toward the third minute gap and be discharged to an outside through the third minute gap. The fluid dynamic bearing apparatus further includes a plurality of dynamic pressure generating grooves and an all around groove. | 09-19-2013 |
20140286600 | APPARATUS INCLUDING CAPILLARY AND LABYRINTH SEALS - Provided herein is an apparatus including a stationary portion having a thrust cup; a rotating portion having a sleeve configured to be rotatable with respect to the stationary portion; a first axially extending space defined by the thrust cup and the sleeve, wherein the first axially extending space includes a second portion positioned above a first portion of the first axially extending space; a capillary seal in the first portion of the first axially extending space; and a labyrinth seal, in the second portion of the first axially extending space. | 09-25-2014 |
Patent application number | Description | Published |
20080201542 | DATA MIGRATING METHOD TAKING END TIME INTO CONSIDERATION - There is provided a data migrating method including the steps of: calculating, in a case where data stored in a volume is migrated to another volume, a required period of time for migrating the data based on a size of data to be migrated and volume configuration information on the volume in which the migrated data is stored and the volume to which the data is to be migrated; determining a start time at which the data migration starts to generate a volume migration plan; setting a priority of the generated volume migration plan; prioritizing, in a case where a periods of time during which the generated volume migration plan is executed and a period of time during which an existing volume migration plan is executed are overlapped with each other, and changing the start time of at least one of those volume migration plans having a lower priority. | 08-21-2008 |
20100042797 | COMPUTER SYSTEM, DATA MIGRATION MONITORING METHOD AND DATA MIGRATION MONITORING PROGRAM - A management computer monitors an allocated capacity of a source virtual volume and an allocated capacity of a virtual pool having a storage area allocated to a destination virtual volume in a storage, judges whether the allocated capacity of the source virtual volume can be covered in the virtual pool or not, and informs the user of a result that data migration fails when the allocated capacity of the source virtual volume cannot be covered. When the allocated capacity of the source virtual volume cannot be covered, the management computer uses another storage area to increase the capacity of the virtual pool. Accordingly, when data migration is performed between the virtual volumes, capacities of physical areas allocated to the source virtual volume and the destination virtual volume can be grasped so that the data migration can be performed accurately between the source virtual volume and the destination virtual volume. | 02-18-2010 |
20100325378 | DATA MIGRATING METHOD TAKING END TIME INTO CONSIDERATION - There is provided a data migrating method including the steps of: calculating, in a case where data stored in a volume is migrated to another volume, a required period of time for migrating the data based on a size of data to be migrated and volume configuration information on the volume in which the migrated data is stored and the volume to which the data is to be migrated; determining a start time at which the data migration starts to generate a volume migration plan; setting a priority of the generated volume migration plan; prioritizing, in a case where a periods of time during which the generated volume migration plan is executed and a period of time during which an existing volume migration plan is executed are overlapped with each other, and changing the start time of at least one of those volume migration plans having a lower priority. | 12-23-2010 |
20110258412 | COMPUTER SYSTEM, DATA MIGRATION MONITORING METHOD AND DATA MIGRATION MONITORING PROGRAM - A management computer monitors an allocated capacity of a source virtual volume and an allocated capacity of a virtual pool having a storage area allocated to a destination virtual volume in a storage, judges whether the allocated capacity of the source virtual volume can be covered in the virtual pool or not, and informs the user of a result that data migration fails when the allocated capacity of the source virtual volume cannot be covered. When the allocated capacity of the source virtual volume cannot be covered, the management computer uses another storage area to increase the capacity of the virtual pool. Accordingly, when data migration is performed between the virtual volumes, capacities of physical areas allocated to the source virtual volume and the destination virtual volume can be grasped so that the data migration can be performed accurately between the source virtual volume and the destination virtual volume. | 10-20-2011 |
20120179887 | DATA MIGRATING METHOD TAKING END TIME INTO CONSIDERATION - A data migrating method including calculating, in a case where data stored in a volume is migrated to another volume, a required period of time for migrating the data based on a size of data to be migrated and volume configuration information on the volume in which the migrated data is stored and the volume to which the data is to be migrated, determining a start time at which the data migration starts to generate a volume migration plan, setting a priority of the generated volume migration plan, prioritizing, in a case where a periods of time during which the generated volume migration plan is executed and a period of time during which an existing volume migration plan is executed are overlapped with each other, and changing the start time of at least one of those volume migration plans having a lower priority. | 07-12-2012 |
Patent application number | Description | Published |
20080288795 | METHOD AND SYSTEM FOR REDUCING POWER CONSUMPTION OF STORAGE SYSTEM SERVING AS TARGET DURING REMOTE COPYING EMPLOYING JOURNAL - A second storage system comprises a restore control unit for controlling restoration processing, in which a data element in a journal stored in a journal storage area is written into a secondary logical volume, and a storage device control unit for controlling a storage device in the second storage system. The restore control unit is provided with a function for suspending the restoration processing. A first value indicating the usage condition of the journal storage area in the second storage system is obtained, and the restore control unit suspends the restoration processing in accordance with the obtained first value. The storage device control unit then executes power saving on a storage device relating to the secondary logical volume. | 11-20-2008 |
20090106400 | REMOTE DATA COPYING AMONG STORAGE SYSTEMS - The present invention provides a method for guaranteeing a data consistency among a plurality of storages and sites, when data transfer is performed by asynchronous remote copying from a site including a plurality of storages. When writing is made into a first storage system or a second storage system, the storage system that received the writing transfers the write data to the other storage system within the site by synchronous remote copying. At this timing the first storage system gives the write data information for order assurance. Furthermore, the first or the second storage system transfers the write data and thus given information for order assurance to the third or the fourth storage system by asynchronous remote copying. Furthermore, the third or the fourth storage system which has received the write data transfers to the other storage system within the same site the write data and information for order assurance by synchronous remote copy. | 04-23-2009 |
20090150606 | INFORMATION PROCESSING SYSTEM HAVING VOLUME GUARD FUNCTION - In a system comprising a first storage system providing plural first logical volumes including real logical volume and a virtual logical volume with a host, a second storage system having a second logical volume, and a management computer, when the first storage system receives an access request to the virtual logical volume, it accesses a second logical volume associated with the virtual logical volume. In this system, when the management computer receives a request to guard one of the plural first logical volumes, it checks whether a target first logical volume of the request is a real logical volume or a virtual logical volume, in case of the virtual logical volume, generates and provides a possible at least one option to guard the virtual logical volume by considering a program for volume guard, which each of the first storage system and the second storage system has. | 06-11-2009 |
20120110358 | POWER CONTROL OF SECONDARY COPY STORAGE BASED ON JOURNAL STORAGE USAGE AND ACCUMULATION SPEED RATE - Arrangements having multiple second storage systems which each include a restore control unit for controlling restoration processing, in which a data element in a journal stored in a journal storage area is written into a secondary logical volume, and a storage device control unit for controlling a storage device in the second storage system. The restore control unit is provided with a function for suspending the restoration processing. A first value indicating the usage condition of the journal storage area in the second storage system is obtained, and the restore control unit suspends the restoration processing in accordance with the obtained first value. The storage device control unit then executes power saving on a storage device relating to the secondary logical volume. | 05-03-2012 |
20120246430 | STORAGE SYSTEM AND DATA RELOCATION CONTROL DEVICE - The present invention achieves data relocation in accordance with a user's policies, in an environment where a plurality of storage devices coexist. The volumes belonging to storage devices A-D are managed virtually integrally. A host recognizes a plurality of storage devices A-D as a single virtual storage device. The user is able to group arbitrarily each volume belonging to the storage system, as a plurality of storage layers | 09-27-2012 |