Proactive data reliability in a power-managed storage system
First Claim
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1. A method for preventing loss of data in a particular disk drive in a power-managed storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the method comprising:
- checking a power budget to determine that sufficient power is available;
powering on the particular disk drive;
checking the particular disk drive; and
correcting the particular disk drive in response to the checking.
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Abstract
Methods and systems for maintaining data reliability in a particular disk drive that is powered off in a storage system are disclosed. The methods include checking a power budget to determine that sufficient power is available, powering on the particular disk drive, and checking the particular disk drive to detect an error. Further, the method includes correcting the particular disk drive when the error is detected.
85 Citations
32 Claims
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1. A method for preventing loss of data in a particular disk drive in a power-managed storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the method comprising:
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checking a power budget to determine that sufficient power is available;
powering on the particular disk drive;
checking the particular disk drive; and
correcting the particular disk drive in response to the checking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for preventing loss of data in a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the apparatus comprising:
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a power budget checker for checking power budget to determine that sufficient power is available;
a power controller for controlling power to the disk drives and the particular disk drive;
a checking-module for checking the particular disk drive; and
a correction-module for correcting the particular disk drive;
whereby, the particular disk drive is powered on by the power controller before the checking is to be performed. - View Dependent Claims (15, 16, 17)
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18. An apparatus for preventing loss of data in a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the apparatus comprising:
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a processor for executing instructions; and
a machine-readable medium including;
one or more instructions for checking a power budget to determine that sufficient power is available;
one or more instructions for powering-on the particular disk drive;
one or more instructions for checking the particular disk drive; and
one or more instructions for correcting the particular disk drive.
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19. A machine-readable medium including instructions executable by a processor for preventing loss of data in a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the machine readable medium comprising:
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one or more instructions for checking a power budget to determine that sufficient power is available;
one or more instructions for powering-on the particular disk drive;
one or more instructions for checking the particular disk drive; and
one or more instructions for correcting the particular disk drive.
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20. A method for repairing a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the method comprising:
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checking a power budget to determine that sufficient power is available;
powering on the particular disk drive; and
correcting the damaged logical blocks in response to the checking. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A system for repairing a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the apparatus comprising:
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a power budget checking unit for checking a power budget to determine that sufficient power is available;
a power controller for controlling power to the disk drives and the particular disk drive; and
a correction-unit for correcting the damaged logical blocks;
whereby, the particular disk is powered-on by the power controller before the checking is to be performed. - View Dependent Claims (27, 28, 29, 30)
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31. An apparatus for repairing a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the apparatus comprising:
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a processor for executing instructions; and
a machine-readable medium including;
one or more instructions for checking a power budget to determine that sufficient power is available;
one or more instructions for powering-on the particular disk drive; and
one or more instructions for correcting the damaged logical blocks.
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32. A machine-readable medium including instructions executable by a processor for repairing a particular disk drive in a storage system, wherein the storage system includes a plurality of disk drives and a particular disk drive, wherein the particular disk drive is powered off, the machine readable medium comprising:
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one or more instructions for checking a power budget to determine that sufficient power is available;
one or more instructions for powering-on the particular disk drive; and
one or more instructions for correcting the damaged logical blocks.
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Specification