Failure diagnosis method, method of manufacturing disk device, and recording medium

Patent metadata

Field	Value
Publication number	US-12596361-B2
Application number	US-202318181087-A
Country	US
Kind code	B2
Filing date	Mar 9, 2023
Priority date	Sep 20, 2022
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

According to an embodiment, there is provided a failure diagnosis method. The failure diagnosis method includes installing a disk device in a manufacturing rack. The failure diagnosis method acquiring, by the disk device, data on a state of a predetermined constituent unit in the manufacturing rack with the disk device being installed in the manufacturing rack. The failure diagnosis method includes determining, by the disk device, whether or not the state of the predetermined constituent unit falls within an allowable range by using the data acquired.

First claim

What is claimed is:

1 . A method of manufacturing a disk device comprising:
installing a disk device in a manufacturing rack and diagnosing, by the disk device, a failure of the manufacturing rack by a failure diagnosis method, the failure diagnosis method comprising:
acquiring, by the disk device, data on a state of a predetermined constituent unit in the manufacturing rack with the disk device being installed in the manufacturing rack; and
determining, by the disk device, whether or not the state of the predetermined constituent unit falls within an allowable range by using the data acquired; and
manufacturing the disk device by using the manufacturing rack when the manufacturing rack has not failed.

2 . The method of manufacturing a disk device according to claim 1 further comprising
not manufacturing the disk device by using the manufacturing rack when the manufacturing rack has failed.

3 . The method of manufacturing a disk device according to claim 1 , wherein the manufacturing a disk device includes:
writing an auxiliary servo pattern on a disk with the disk device including the disk being installed in the manufacturing rack; and writing a servo pattern corresponding to the auxiliary servo pattern on the disk with the disk device being installed in the manufacturing rack.

4 . The method according to claim 1 , wherein, the failure diagnosis method further including:
determining, by a rack terminal that manages the manufacturing rack, that the predetermined constituent unit fails when the state of the predetermined constituent unit is out of an allowable range; and determining, by the rack terminal, that the predetermined constituent unit has not failed when the state of the predetermined constituent unit falls within the allowable range.

5 . The method according to claim 1 , wherein the acquiring data includes acquiring, by the disk device, data on a level of power supply from the manufacturing rack with the disk device being installed in the manufacturing rack.

6 . The method according to claim 1 , wherein
the disk device includes a spindle motor, and the acquiring data includes acquiring, by the disk device, data on a rotation period of the spindle motor that is operated by power corresponding to power supply from the manufacturing rack with the disk device being installed in the manufacturing rack.

7 . The method according to claim 1 , wherein
plural disk devices are installed in the predetermined constituent unit, each of the plural disk devices being identical to the disk device, the failure diagnosis method further including:
determining that a state of the predetermined constituent unit is out of the allowable range when a state of at least one of the plural disk devices is out of an allowable range, a state of the predetermined constituent unit is; and
determining that the state of the predetermined constituent unit falls within the allowable range when states of the plural disk devices fall within the allowable range.

8 . The method according to claim 5 , wherein
the disk device includes a spindle motor, and the acquiring data further includes acquiring, by the disk device, data on a rotation period of the spindle motor that is operated by power corresponding to power supply from the manufacturing rack with the disk device being installed in the manufacturing rack.

9 . The method according to claim 5 , wherein
the determining by the disk device includes determining whether or not the level of power supply falls between an upper limit value and a lower limit value of an allowable range of the level of power supply.

10 . The method according to claim 6 , wherein
the determining by the disk device includes determining whether or not the rotation period falls between an upper limit value and a lower limit value of an allowable range of the rotation period.

11 . The method according to claim 8 , wherein the disk device determining includes:
determining whether or not the level of power supply falls between an upper limit value and a lower limit value of an allowable range of the level of power supply; and determining whether or not the rotation period falls between an upper limit value and a lower limit value of an allowable range of the rotation period.

12 . The method according to claim 1 , wherein the predetermined constituent unit includes a whole of the manufacturing rack.

13 . The method according to claim 1 , wherein
the manufacturing rack includes plural pallets, the disk device is provided in each of the plurality of pallets, and the predetermined constituent unit includes the pallet.

14 . The method according to claim 1 , wherein
the manufacturing rack includes plural pallets, each of the plurality of pallets includes plural ports, the disk device is connected to each of the plurality of ports, and the predetermined constituent unit includes each of the ports.

15 . The method according to claim 4 , wherein
the manufacturing rack includes:
a rack interface to which the rack terminal is allowed to be connected; and
plural pallets each connected to the rack interface,
the disk device is installed in each of the plurality of pallets, and the predetermined constituent unit includes the pallet.

16 . The failure diagnosis method according to claim 4 , wherein
the manufacturing rack includes:
a rack interface to which the rack terminal is allowed to be connected; and
plural pallets each connected to the rack interface,
each of the plurality of pallets includes plural ports, the disk device is connected to each of the plurality of ports, and the predetermined constituent unit includes each of the ports.

17 . The method according to claim 4 , wherein
plural disk devices are installed in the predetermined constituent unit, each of the plural disk devices being identical to the disk device, and the failure diagnosis method further includes:
acquiring, by the rack terminal, a determination result from the plurality of disk devices;
determining, by the rack terminal, that a state of the predetermined constituent unit is out of an allowable range when a state of at least one of the plural disk devices are out of the allowable range; and
determining, by the rack terminal, that the state of the predetermined constituent unit falls within the allowable range when states of the plural disk devices fall within the allowable range in accordance with the determination result from the plurality of disk devices.

18 . A method of manufacturing a disk device comprising:
installing a disk device in a manufacturing rack and diagnosing, by the disk device, a failure of the manufacturing rack, using a non-transitory computer readable recording medium having a failure diagnosis program, the failure diagnosis program causing a computer to perform:
acquiring, by the disk device, data on a state of a predetermined constituent unit in the manufacturing rack with the disk device being installed in the manufacturing rack; and
determining, by the disk device, whether or not the state of the predetermined constituent unit falls within an allowable range by using the data acquired; and
manufacturing the disk device by using the manufacturing rack when the manufacturing rack has not failed.

19 . The method according to claim 18 , wherein
the failure diagnosis program causes the computer to further perform:
determining that the predetermined constituent unit has failed when the state of the predetermined constituent unit is out of

Assignees

• Kk Toshiba
• Toshiba Electronic Devices & Storage Corp

Inventors

• Higashino Yoshinari

Classifications

• G11B20/18 Primary

  Error detection or correction; Testing {, e.g. of drop-outs} · CPC title

• G11B2220/20

  Disc-shaped record carriers · CPC title

• G05B23/0235

  based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold · CPC title

• G05B23/0221 Primary

  Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods · CPC title