SHIFTING WEAROUT OF STORAGE DISKS
First Claim
1. A method for forestalling data loss caused by wearout of storage disks in an array of storage disks in a storage system, the method comprising:
- monitoring, by a controller, a rate of writes for a first storage disk in the array;
determining, by the controller, a predicted mean time to failure of the first storage disk based on the rate of writes;
determining, by the controller, a start time based on the predicted mean time to failure, a number of storage disks in the array, and an estimated time taken to replace a storage disk in the array; and
issuing, by the controller, at the start time, a notification, the notification including an alert to replace a first storage disk, wherein the notification is issued prior to the first storage disk reaching a wearout, and wherein replacing the first storage disk in response to the notification forestalls data loss caused by a wearout of a second storage disk in conjunction with the wearout of the first storage device.
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Abstract
Technical solutions are described to forestall data loss caused by wearout of storage disks in an array of storage disks in a storage system by monitoring a rate of writes for a first storage disk in the array and determining a mean time to failure of the first storage disk. A start time is determined based on the mean time to failure, a number of storage disks in the array, and a time to replace a storage disk in the array. At the start time, a notification is issued as an alert to replace the first storage disk to forestall data loss caused by wearout of a second storage disk in conjunction with a wearout of the first storage disk.
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Citations
10 Claims
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1. A method for forestalling data loss caused by wearout of storage disks in an array of storage disks in a storage system, the method comprising:
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monitoring, by a controller, a rate of writes for a first storage disk in the array; determining, by the controller, a predicted mean time to failure of the first storage disk based on the rate of writes; determining, by the controller, a start time based on the predicted mean time to failure, a number of storage disks in the array, and an estimated time taken to replace a storage disk in the array; and issuing, by the controller, at the start time, a notification, the notification including an alert to replace a first storage disk, wherein the notification is issued prior to the first storage disk reaching a wearout, and wherein replacing the first storage disk in response to the notification forestalls data loss caused by a wearout of a second storage disk in conjunction with the wearout of the first storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification