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1. 发明授权

US10061696B2 Partial garbage collection for fast error handling and optimized garbage collection for the invisible band 有权
公开(公告)号：US10061696B2
公开(公告)日：2018-08-28
申请号：US15166694
申请日：2016-05-27
申请人： Western Digital Technologies, Inc. , Skyera, LLC
发明人： Justin Jones , Andrew J. Tomlin , Paul Sweazey , Johnny A. Lam , Rodney N. Mullendore
IPC分类号： G06F11/00 , G06F12/02 , G06F11/07 , G06F12/00
CPC分类号： G06F12/0253 , G06F11/073 , G06F11/0793 , G06F12/00 , G06F12/0246 , G06F2212/1044 , G06F2212/7205
摘要： A method for managing garbage collection of memory locations in an DSD having a plurality of dies each having a plurality of memory blocks includes: selecting a physical region of memory to be garbage collected, the selected physical region being a subset of a block management region; and garbage collecting the selected physical region. The garbage collecting includes: determining one or more journals corresponding to the selected physical region, the journal comprising transaction entries indicating what logical data are written to memory locations in the selected physical region; determining whether the memory locations within the physical region contain valid data based on a comparison of information in the journal and a mapping table; and if valid data exists, copying valid data into memory locations in memory regions other than the selected physical region of memory. The selected physical region of memory is erased when the block management region is erased.

2. 发明授权

US09760304B2 High performance system for selective merging of dataframe segments 有权
公开(公告)号：US09760304B2
公开(公告)日：2017-09-12
申请号：US14988440
申请日：2016-01-05
申请人： Western Digital Technologies, Inc. , Skyera, LLC
发明人： Jack W. Flinsbaugh , Justin Jones , Rodney N. Mullendore , Andrew J. Tomlin
IPC分类号： G06F12/00 , G06F3/06 , G06F12/02
CPC分类号： G06F3/064 , G06F3/06 , G06F3/0604 , G06F3/061 , G06F3/0613 , G06F3/0656 , G06F3/0659 , G06F3/0661 , G06F3/0673 , G06F3/0679 , G06F12/0246
摘要： A method of writing data to a range of logical blocks in a storage medium includes: receiving a command including a starting logical block address, a value indicating a range of logical block addresses to be written, and a logical block of data; storing the logical block in a first temporary storage; generating a logical page by duplicating the logical block a plurality of times corresponding to a number of logical blocks in a logical page and transporting the generated logical page to a second temporary storage and storing the generated logical page in the second temporary storage; writing the generated logical page from the second temporary storage into the storage medium beginning from the starting logical block address; and performing a read-modify-write operation if the first write operation does not begin on a logical page boundary or the last write operation does not end on a logical page boundary.

3. 发明授权

US09384088B1 Double writing map table entries in a data storage system to guard against silent corruption 有权
标题翻译：在数据存储系统中双重写入映射表条目以防止静默损坏
公开(公告)号：US09384088B1
公开(公告)日：2016-07-05
申请号：US14250212
申请日：2014-04-10
申请人： Western Digital Technologies, Inc.
发明人： Justin Jones , Andrew J. Tomlin , Rodney N. Mullendore
IPC分类号： G11C29/00 , G06F11/10 , G11C29/52
CPC分类号： G06F3/0619 , G06F3/0659 , G06F3/0665 , G06F3/0679 , G06F11/1064 , G06F11/1068 , G06F11/1435 , G06F12/1009 , G06F2212/1032 , G06F2212/214 , G06F2212/403 , G06F2212/651 , G06F2212/657 , G06F2212/7201 , G11C29/52
摘要： A method for writing data in a data storage device includes: writing data to a physical memory location in a non-volatile memory; writing, for a first time, to a location in a volatile memory corresponding to a logical address of the data, a physical address of the physical memory location of the non-volatile memory containing the data; and writing, for a second time, to the location in the volatile memory corresponding to the logical address of the data, the address of the physical memory location of the non-volatile memory containing the data. The physical address of the physical memory location is written with appended error detection code information, and the error detection code information is determined based on the logical address of the data.
摘要翻译：一种在数据存储设备中写入数据的方法包括：将数据写入非易失性存储器中的物理存储器位置; 将第一次写入与数据的逻辑地址对应的易失性存储器中的位置，包含数据的非易失性存储器的物理存储器位置的物理地址; 并且将第二次写入对应于数据的逻辑地址的易失性存储器中的位置，包含数据的非易失性存储器的物理存储器位置的地址。物理存储器位置的物理地址用附加的错误检测码信息写入，并且基于数据的逻辑地址来确定错误检测码信息。

4. 发明授权

US10417123B1 Systems and methods for improving garbage collection and wear leveling performance in data storage systems 有权
公开(公告)号：US10417123B1
公开(公告)日：2019-09-17
申请号：US14028412
申请日：2013-09-16
申请人： Western Digital Technologies, Inc.
发明人： Kamyar Souri , Andrew J. Tomlin , Dmitry S. Obukhov , Jing Booth , Mei-Man L. Syu
IPC分类号： G06F12/00 , G06F12/02
摘要： Disclosed embodiments are directed to systems and methods for improving garbage collection and wear leveling performance in data storage systems. The embodiments can improve the efficiency of static wear leveling by picking the best candidate block for static wear leveling and/or postponing static wear leveling on certain candidate blocks. In one embodiment, one or more source blocks for a static wear leveling operation are selected based at least on whether the one or more blocks have a low P/E count and contain static data, such as data that has been garbage collected.

5. 发明授权

US09817577B2 Methods, devices and systems for two stage power-on map rebuild with free space accounting in a solid state drive 有权
公开(公告)号：US09817577B2
公开(公告)日：2017-11-14
申请号：US15275670
申请日：2016-09-26
申请人： Western Digital Technologies, Inc. , Skyera, LLC
发明人： Andrew J. Tomlin , Justin Jones , Rodney N. Mullendore
IPC分类号： G06F3/00 , G06F12/00 , G06F3/06 , G06F12/02
CPC分类号： G06F3/0607 , G06F3/0659 , G06F3/0688 , G06F12/02 , G06F12/0246 , G06F12/0292 , G06F2212/7201 , G06F2212/7205
摘要： A data storage device comprises a non-volatile memory comprising a plurality of blocks, each configured to store a plurality of physical pages at predetermined physical locations. A controller programs and reads data stored in a plurality of logical pages. A volatile memory comprises a logical-to-physical address translation map configured to enabling determination of the physical location, within one or more physical pages, of the data stored in each logical page. A plurality of journals may be stored, each comprising a plurality of entries associating one or more physical pages to each logical page. At startup, the controller may read at least some of the plurality of journals in an order and rebuild the map; indicate a readiness to service data access commands after the map is rebuilt; rebuild a table from the map and, based thereon, select block(s) for garbage collection after having indicated the readiness to process the commands.

6. 发明授权

US09489296B1 Methods, devices and systems for hardware-based garbage collection in solid state drives 有权
标题翻译：固态硬盘中基于硬件的垃圾回收的方法，设备和系统
公开(公告)号：US09489296B1
公开(公告)日：2016-11-08
申请号：US13654288
申请日：2012-10-17
申请人： Western Digital Technologies, Inc. , Skyera, LLC
发明人： Andrew J. Tomlin , Rodney N. Mullendore , Justin Jones
IPC分类号： G06F12/02
CPC分类号： G06F12/0638 , G06F12/0246 , G06F12/0253 , G06F12/1009 , G06F2212/1008 , G06F2212/1016 , G06F2212/1032 , G06F2212/1044 , G06F2212/205 , G06F2212/7201 , G06F2212/7205 , G06F2212/7209 , G06F2212/7211
摘要： A data storage device may comprise non-volatile memory devices, each configured to store a plurality of physical pages, a controller and a first volatile memory configured to store a logical-to-physical address translation map that enables the controller to determine a physical location of logical pages. The controller may maintain, in the memory devices, a plurality of journals defining physical-to-logical page correspondences, each entry of which associating one or more physical pages to a logical page. Garbage collection may be carried out by reading entries of the journals; determining a validity of each logical page referenced by the read entries through a comparison with a corresponding entry in the map, the logical pages referenced by the read entries being stored in first physical pages; writing logical pages determined to be valid to second physical pages and updating the map accordingly; and designating at least the first physical pages as free space.
摘要翻译：数据存储设备可以包括非易失性存储器设备，每个非易失性存储器设备被配置为存储多个物理页面，控制器和第一易失性存储器，其被配置为存储使得控制器能够确定物理位置的逻辑到物理地址转换映射的逻辑页面。控制器可以在存储器设备中维护定义物理到逻辑页对应的多个日记帐，每个期刊的每个条目将一个或多个物理页面与逻辑页面相关联。垃圾收集可以通过阅读期刊的条目进行; 通过与地图中的对应条目的比较来确定由读取条目引用的每个逻辑页面的有效性，由读取条目引用的逻辑页面存储在第一物理页面中; 写出逻辑页面被确定为对第二物理页面有效并相应地更新地图; 并至少指定第一个物理页面作为可用空间。

7. 发明授权

US09354955B1 Partial garbage collection for fast error handling and optimized garbage collection for the invisible band 有权
标题翻译：部分垃圾回收用于快速错误处理和优化垃圾收集的无形带
公开(公告)号：US09354955B1
公开(公告)日：2016-05-31
申请号：US14250000
申请日：2014-04-10
申请人： Western Digital Technologies, Inc. , Skyera, LLC
发明人： Justin Jones , Andrew J. Tomlin , Paul Sweazey , Johnny A. Lam , Rodney N. Mullendore
IPC分类号： G06F11/00 , G06F11/07
CPC分类号： G06F12/0253 , G06F11/073 , G06F11/0793 , G06F12/00 , G06F12/0246 , G06F2212/1044 , G06F2212/7205
摘要： A method for managing garbage collection of memory locations in an DSD having a plurality of dies each having a plurality of memory blocks includes: selecting a physical region of memory to be garbage collected, the selected physical region being a subset of a block management region; and garbage collecting the selected physical region. The garbage collecting includes: determining one or more journals corresponding to the selected physical region, the journal comprising transaction entries indicating what logical data are written to memory locations in the selected physical region; determining whether the memory locations within the physical region contain valid data based on a comparison of information in the journal and a mapping table; and if valid data exists, copying valid data into memory locations in memory regions other than the selected physical region of memory. The selected physical region of memory is erased when the block management region is erased.
摘要翻译：一种用于管理具有多个存储块的多个管芯的DSD中的存储器位置的垃圾回收的方法，包括：选择要进行垃圾收集的存储器的物理区域，所选择的物理区域是块管理区域的子集; 和垃圾收集所选择的物理区域。垃圾收集包括：确定与所选择的物理区域相对应的一个或多个期刊，所述期刊包括指示什么逻辑数据被写入所选择的物理区域中的存储器位置的交易条目; 基于日志中的信息与映射表来确定物理区域内的存储单元是否包含有效数据; 并且如果存在有效数据，则将有效数据复制到存储器区域中，而不是存储器的选定物理区域以外的存储器区域。当块管理区域被擦除时，所选择的存储器物理区域被擦除。

8. 发明授权

US10055345B2 Methods, devices and systems for solid state drive control 有权
公开(公告)号：US10055345B2
公开(公告)日：2018-08-21
申请号：US15345100
申请日：2016-11-07
申请人： Skyera, LLC , Western Digital Technologies, Inc.
发明人： Andrew J. Tomlin , Rodney N. Mullendore , Justin Jones
IPC分类号： G06F12/00 , G06F12/06 , G06F12/02 , G06F12/1009
CPC分类号： G06F12/0638 , G06F12/0246 , G06F12/0253 , G06F12/1009 , G06F2212/1008 , G06F2212/1016 , G06F2212/1032 , G06F2212/1044 , G06F2212/205 , G06F2212/7201 , G06F2212/7205 , G06F2212/7209 , G06F2212/7211
摘要： A solid state drive controller includes a processor configured to couple to a plurality of non-volatile memory devices. The plurality of non-volatile memory devices are configured to store a plurality of system journals and a plurality of physical pages. The solid state drive controller also includes a volatile memory configured to store a logical-to-physical address translation map configured to enable the solid state drive controller to determine a physical location of at least one logical page. The processor is configured to maintain the plurality of system journals in the plurality of non-volatile memory devices, wherein each system journal defines physical-to-logical page correspondences for a predetermined range of the plurality of physical pages, and each system journal comprises an identification number that includes a portion of an address of a first physical page of the predetermined range of the plurality of physical pages.

9. 发明申请

US20170357571A1 MEMORY UNIT ASSIGNMENT AND SELECTION FOR INTERNAL MEMORY OPERATIONS IN DATA STORAGE SYSTEMS 审中-公开
公开(公告)号：US20170357571A1
公开(公告)日：2017-12-14
申请号：US15495900
申请日：2017-04-24
申请人： Western Digital Technologies, Inc.
发明人： Kamyar SOURI , Andrew J. Tomlin , Dmitry S. Obukhov , Jing Booth , Mei-Man L. Syu
IPC分类号： G06F12/02
CPC分类号： G06F12/0246 , G06F12/0253 , G06F2212/1016 , G06F2212/1036 , G06F2212/7205 , G06F2212/7211
摘要： Disclosed embodiments are directed to systems and methods for assigning and selecting memory units for internal memory operations in data storage systems. The embodiments can improve the efficiency of garbage collection operations by directing dynamic data into memory units with a relatively lower P/E count, directing static and system data into memory units with a relatively higher P/E count, and not mixing static and dynamic data by packing static data into separate memory units from dynamic data. In one embodiment, after completion of garbage collection of blocks, the blocks are each assigned to one of a cool down list and an available memory unit list based on a size limit of the cool down list and a number of program-erase (P/E) operations performed on each block. The blocks are subsequently selected from the lists for write operations according to whether write data includes static or dynamic data.

10. 发明申请

US20170344287A1 ATOMIC WRITE COMMAND SUPPORT IN A SOLID STATE DRIVE 审中-公开
公开(公告)号：US20170344287A1
公开(公告)日：2017-11-30
申请号：US15458901
申请日：2017-03-14
申请人： Western Digital Technologies, Inc. , Skyera, LLC
发明人： Andrew J. Tomlin , Justin Jones , Rodney N. Mullendore
IPC分类号： G06F3/06 , G06F12/02 , G06F9/46 , G06F12/06 , G06F12/1081 , G11C16/10
CPC分类号： G06F3/0619 , G06F3/065 , G06F3/0659 , G06F3/0685 , G06F3/0688 , G06F9/466 , G06F12/0246 , G06F12/0638 , G06F12/1081 , G06F2212/205 , G06F2212/7201 , G06F2212/7209 , G11C16/10
摘要： A method of performing an atomic write command in a data storage device comprising a volatile memory and a plurality of non-volatile memory devices configured to store a plurality of physical pages. The method may comprise storing data in a plurality of logical pages (L-Pages), each associated with a logical address. A logical-to-physical address translation map may be maintained in the volatile memory, and may be configured to enable determination of a physical location, within one or more of the physical pages, of the data referenced by each logical address. The data specified by a received atomic write command may be stored one or more L-Pages. Updates to the entry or entries in the translation map associated with the L-Page(s) storing the data specified by the atomic write command may be deferred until all L-Pages storing data specified by the atomic write command have been written in a power-safe manner.

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