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1. 发明授权

US10360144B2 Storage apparatus and non-volatile memory device including a controller to selectively compress data based on an update frequency level 有权
公开(公告)号：US10360144B2
公开(公告)日：2019-07-23
申请号：US15545094
申请日：2015-02-27
申请人： HITACHI, LTD.
发明人： Masatsugu Oshimi , Yoshihiro Oikawa , Hiroshi Hirayama , Junji Ogawa
IPC分类号： G06F12/02 , G06F3/06 , G11C16/34 , G06F12/00 , G06F12/04 , G11C7/10 , G11C11/56 , G11C16/04
摘要： A storage apparatus includes a non-volatile memory and a controller to determine whether or not to compress data at a time when a non-volatile memory device receives the data from a host apparatus. A storage controller transmits a specified logical address range, an update frequency level of the specified logical address range, and specified data to a device controller. The update frequency level may indicate whether data is Hot or Cold. On the basis of the update frequency level of the specified logical address range, the device controller determines whether to compress the specified data. When a determination is made to compress the specified data, the device controller compresses the specified data to generate compressed data, and writes the compressed data into a non-volatile memory which may be a flash memory device. A degradation rank of physical blocks in the flash memory may include at least Young and Old. Reclamation processing including selecting a migration destination on the basis of the updated frequency level may also be performed. When a determination is made not to compress the specified data, the device controller writes the specified data into the non-volatile memory.

2. 发明授权

US09898201B2 Non-volatile memory device, and storage apparatus to reduce a read retry occurrence frequency and prevent read performance from lowering 有权
公开(公告)号：US09898201B2
公开(公告)日：2018-02-20
申请号：US15122669
申请日：2014-03-24
申请人： HITACHI, LTD.
发明人： Yoshihiro Oikawa , Hiroshi Hirayama
IPC分类号： G11C8/00 , G06F3/06 , G06F12/16 , G06F12/02 , G06F11/10 , G11C16/16
CPC分类号： G06F3/061 , G06F3/06 , G06F3/0655 , G06F3/0679 , G06F11/1004 , G06F11/1076 , G06F12/0238 , G06F12/16 , G06F2212/1016 , G06F2212/7208 , G11C16/16
摘要： A non-volatile memory device includes a non-volatile memory and a memory controller which executes read from the non-volatile memory using a read option. The non-volatile memory includes a plurality of memory area units (e.g. dies described below), and each memory area unit includes a plurality of memory areas (e.g. pages). The memory controller holds management information in which a read option is recorded per memory area unit which is a unit larger than a memory area which is a read unit. The memory controller specifies a memory area unit including a read source memory area, selects a read option matching the specified memory area unit, and executes read from the read source memory area using the selected read option.

3. 发明授权

US09645926B2 Storage system and method for managing file cache and block cache based on access type 有权
公开(公告)号：US09645926B2
公开(公告)日：2017-05-09
申请号：US13695565
申请日：2012-10-19
申请人： Hitachi, Ltd.
发明人： Masanori Takada , Akira Yamamoto , Hiroshi Hirayama
IPC分类号： G06F12/08 , G06F12/0806 , G06F12/0875 , G06F12/0895
CPC分类号： G06F12/0806 , G06F12/0875 , G06F12/0895
摘要： It is provided a storage system, comprising a storage device for storing data and at least one controller for controlling reading/writing of the data from/to the storage device. The at least one controller each includes a first cache memory for temporarily storing the data read from the storage device by file access, and a second cache memory for temporarily storing the data to be read/written from/to the storage device by block access. The processor reads the requested data from the storage device in the case where data requested by a file read request received from a host computer is not stored in the first cache memory, stores the data read from the storage device in the first cache memory without storing the data in the second cache memory, and transfers the data stored in the first cache memory to the host computer that has issued the file read request.

4. 发明授权

US09817768B2 Storage system and data storing method 有权
公开(公告)号：US09817768B2
公开(公告)日：2017-11-14
申请号：US14773116
申请日：2013-10-10
申请人： Hitachi, Ltd.
发明人： Keisuke Ueda , Go Uehara , Kenta Ninose , Hiroshi Hirayama
IPC分类号： G06F3/06 , G06F12/10 , G06F3/08 , G06F12/02
CPC分类号： G06F12/10 , G06F3/06 , G06F3/0608 , G06F3/0616 , G06F3/0631 , G06F3/0653 , G06F3/0689 , G06F3/08 , G06F12/0246 , G06F2212/65 , G06F2212/7202 , G06F2212/7204
摘要： Provided is a storage system including: a storage medium including a plurality of physical storage areas having an upper limit number of rewrites, and a medium controller that controls I/O (input/output) of data to/from the plurality of physical storage areas; and a storage controller connected to the storage medium, wherein when any of the physical storage areas is not allocated to a write destination logical storage area among a plurality of logical storage areas, the medium controller allocates a vacant physical storage area among the plurality of physical storage areas to the write destination logical storage area and writes write target data to the allocated vacant physical storage area, and the plurality of logical storage areas includes an available logical area group determined based on a relationship between an available capacity of a logical storage capacity and a rewrite frequency of the plurality of physical storage areas.

5. 发明申请

US20140115255A1 STORAGE SYSTEM AND METHOD FOR CONTROLLING STORAGE SYSTEM 有权
标题翻译：存储系统和控制存储系统的方法
公开(公告)号：US20140115255A1
公开(公告)日：2014-04-24
申请号：US13695565
申请日：2012-10-19
申请人： Hitachi, Ltd.
发明人： Masanori Takada , Akira Yamamoto , Hiroshi Hirayama
IPC分类号： G06F12/08
CPC分类号： G06F12/0806 , G06F12/0875 , G06F12/0895
摘要： It is provided a storage system, comprising a storage device for storing data and at least one controller for controlling reading/writing of the data from/to the storage device. The at least one controller each includes a first cache memory for temporarily storing the data read from the storage device by file access, and a second cache memory for temporarily storing the data to be read/written from/to the storage device by block access. The processor reads the requested data from the storage device in the case where data requested by a file read request received from a host computer is not stored in the first cache memory, stores the data read from the storage device in the first cache memory without storing the data in the second cache memory, and transfers the data stored in the first cache memory to the host computer that has issued the file read request.
摘要翻译：提供了一种存储系统，包括用于存储数据的存储装置和用于控制从/向存储装置读取/写入数据的至少一个控制器。所述至少一个控制器包括用于通过文件访问临时存储从存储设备读取的数据的第一高速缓存存储器，以及用于通过块访问临时存储要从/向存储设备读/写的数据的第二高速缓存存储器。在从主计算机接收到的文件读取请求的数据未被存储在第一高速缓冲存储器中的情况下，处理器从存储装置读取所请求的数据，将从存储装置读取的数据存储在第一高速缓冲存储器中而不存储第二高速缓冲存储器中的数据，并且将存储在第一高速缓冲存储器中的数据传送到已经发出文件读取请求的主计算机。

6. 发明授权

US10198318B2 Storage apparatus having nonvolatile memory device, and nonvolatile memory device 有权
公开(公告)号：US10198318B2
公开(公告)日：2019-02-05
申请号：US15509732
申请日：2014-10-27
申请人： Hitachi, Ltd.
发明人： Yoshihiro Oikawa , Hiroshi Hirayama , Kenta Ninose
IPC分类号： G06F3/06 , G06F11/10 , G06F12/02 , G06F12/00 , G06F12/16 , G06F21/78
摘要： A nonvolatile memory device includes: a nonvolatile memory including a plurality of physical blocks; and a memory controller configured to execute an internal process of migrating data between physical blocks. The memory controller is configured to select, based on an update frequency level which is identified with respect to a logical address range from a higher-level apparatus, a physical block to be allocated to the logical address range from among the plurality of physical blocks. The memory controller is configured to determine, in the internal process, whether to set a migration destination level (an update frequency level of a migration destination physical block) to a same level as or a different level from a migration source level (an update frequency level of a migration source physical block) based on whether or not an attribute of the migration source physical block satisfies a prescribed condition.

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