US 2007/0183080 A1Published application

Portable electronic device

AssigneeKabushiki Kaisha Toshiba

InventorsYasuhiko Abe, Yoshiyuki Matsubara

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Abstract

A memory to store a state identifier showing whether or not to permit reading out an occurrence number of times of disk shifts from a disk storage unit is newly provided so as to intermittently change the identifier from a first state to a second state. When access requests to the disk unit are made, information showing the occurrence number of times of the disk shifts is read from the storage unit along with a data writing or reading operation to and from the storage unit. After a completion of reading the information, the identifier is returned from the second state to the first state. The identifier is changed from the first state to the second state with a determined time interval which is set longer than, for example, a minimum value of occurrence time intervals of the access requests.

Claims9

Dependent claims

A portable electronic device, comprising:

a disk storage unit configured to store an information related to disc shifts when the disc shifts are caused;
an access unit configured to access to the disk storage unit to write in or read out data if access requests to the disk storage unit are made;
a memory configured to store a state identifier indicating whether or not to permit reading information related to the disk shifts;
a first identifier controller configured to temporarily change the state identifier stored in the memory from a first state to a second state;
a read-out controller configured to read out the information related to the disk shifts from the access unit along with a data writing or reading operation performed by the access unit when the access requests are made in a state in which the state identifier is set to the second state;
and
a second identifier controller configured to return the state identifier from the second state to the first state in response to a completion of reading out information related to the disk shifts.

4 more elements

A portable electronic device, comprising:

a disk storage unit configured to store an information related to an occurrence number of times of disk shifts when the disc shifts are caused;
an access unit configured to access the disk storage unit to write in or read out data if access requests to the disk storage unit are made;
a memory configured to store a state identifier indicating whether or not to permit reading information related to the occurrence number of times of the disk shifts;
a first identifier controller configured to temporarily change the state identifier stored in the memory from a first state to a second state;
a read-out controller configured to read out the information related to the occurrence number of times of the disk shifts from the access unit along with a data writing or reading operation performed by the access unit if the access requests are made in a state in which the state identifier is set to the second state;
and
a second identifier controller configured to return the state identifier from the second state to the first state in response to a completion of reading out information related to the occurrence number of times of the disk shifts.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/493,258Filed 26 Jul 2006
Priority: JP 2006-0315028 Feb 2006
Published: 9 Aug 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G11B 5/59627
For track following on disks: aligning for runout, eccentricity or offset compensation
G11B 5/5582
Across disk tracks: system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused…
G11B 19/04
Control of operating function, e.g. switching from recording to reproducing: arrangements for preventing, inhibiting, or warning against double…
G11B 19/06
Control of operating function, e.g. switching from recording to reproducing: by counting or timing of machine operations