A memory system includes a volatile first storing unit, a nonvolatile second storing unit, and a controller. The controller performs data transfer, stores management information including a storage position of the data stored in the second storing unit into the first storing unit, and performs data management while updating the management information. The second storing unit has a management information storage area for storing management information storage information including management information in a latest state and a storage position of the management information. The storage position information is read by the controller during a startup operation of the memory system and includes a second pointer indicating a storage position of management information in a latest state in the management information storage area and a first pointer indicating a storage position of the second pointer. The first pointer is stored in a fixed area in the second storing unit and the second pointer is stored in an area excluding the fixed area in the second storing unit.

Claims

19 · 4 independent · depth 3

19 granted claims

›1.independentA memory system comprising:na volatile memory;a nonvolatile memory configured to store management information indicating a storage location of data, a…+8

›2.↳ 1The memory system according to claim 1, wherein the controller is configured to save the management information stored in the volatile memory into the…d2+1

›4.↳ 1The memory system according to claim 1, whereinnthe first pointer is stored in a fixed area whose storage location in the nonvolatile memory is fixed …d2+2

›5.↳ 1The memory system according to claim 1, wherein the controller is configured to save the backup information in a backup storage area of the nonvolatil…d2

›6.↳ 1The memory system according to claim 1, whereinnthe nonvolatile memory includes a plurality of blocks, each of the plurality of blocks being a data er…d2

›9.↳ 1The memory system according to claim 1, wherein the nonvolatile memory is capable of storing multiple bits in one memory cell.d2

›10.independentA method of controlling a memory system comprising:nstoring management information for data management, a first pointer, and a second pointer in a non…+7

›11.↳ 10The method according to claim 10, wherein,nin the saving of the backup information, when a predetermined condition is satisfied, the backup informatio…d2

›12.↳ 10The method according to claim 10, wherein,nin the saving of the backup information, the backup information is stored in a backup storage area of the n…d2

›13.↳ 10The method according to claim 10, wherein,nin the saving of the backup information, the backup information is saved in a backup storage area of the no…d2

›14.↳ 10The method according to claim 10, whereinnthe nonvolatile memory includes a plurality of blocks, each of the plurality of blocks being a data erasing …d2

›15.↳ 10The method according to claim 10, further comprising:nmultiplexing the first pointer in a fixed area whose storage location in the nonvolatile memory …d2

›16.↳ 10The method according to claim 10, further comprising:nmultiplexing the second pointer in a variable area whose storage location in the nonvolatile mem…d2

›17.↳ 10The method according to claim 10, wherein the nonvolatile memory is capable of storing multiple bits in one memory cell.d2

›18.independentA memory system comprising:na controller configured to manage data; anda nonvolatile memory configured to store management information, a first pointe…

›19.independentA memory system comprising:na nonvolatile memory configured to store management information; anda controller configured to control updating of a first…

Classifications

11 codes

IPC · International Patent Classification

Section G — Physics

G06F12/02
G06F11/14
G06F12/16
G06F12/06
G11C7/20
G11C16/10
G11C16/04
G11C11/56

USPC · US Patent Classification

711/154711/103711/E12.008

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

⤢ drag to zoom

USPTOApplicanthover for detail · click to open

Pendency

1.1 y

384 days filing → grant

Office actions

non-final + final

Responses

no RCE

Interviews

examiner interview summaries

Examiner

Hal Schnee

art unit 2132 · TC 2100

Law firm

Law firm · Log in to unlock

Citations: 20 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20140208013 A1	24 Jul 2014

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.