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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Reset Physical Disk

This command power cycles a physical disk in a disk group or a disk pool to aid in the recovery of a physical disk that is exhibiting inconsistent or non-optimal behavior.

By power cycling a physical disk, some errors that cause inconsistent or non-optimal behavior can be cleared. This avoids replacing a physical disk when it is experiencing only a transient, non-fatal error, and the physical disk can remain operational. Resetting a physical disk in this way reduces disruptions and avoids replacing a physical disk.

If the problem cannot be corrected by power cycling the physical disk, the data is copied from the physical disk and the physical disk is powered down for replacement.

Syntax

reset physicalDisk([enclosureID,drawerID,slotID] | <"wwID">)

Parameters

Parameter

Description

physicalDisk

The location of the physical disk that you want to replace. For dense expansion enclosures, specify the enclosure ID value, the drawer ID value, and the slot ID value of the physical disk that you want to revive. For non-dense expansion enclosures, specify the enclosure ID value and the slot ID value of the physical disk that you want to revive. Enclosure ID values are 0 to 99. Drawer ID values are 0 to 4. Slot ID values are 0 to 31. Enclose the enclosure ID value, the drawer ID value, and the slot ID value in square brackets ([ ]).

physicalDisk

The World Wide Identifier (WWID) of the physical disk that you want to replace. Enclose the WWID in double quotation marks (" ") inside angle brackets (< >).

  • NOTE: The physicalDisk parameter supports both dense expansion enclosures and non-dense expansion enclosures. A dense expansion enclosure has drawers that hold the physical disks. The drawers slide out of the expansion enclosure to provide access to the physical disks. A non-dense expansion enclosure does not have drawers. For a dense expansion enclosure, you must specify the identifier (ID) of the expansion enclosure, the ID of the drawer, and the ID of the slot in which a physical disk resides. For a non-dense expansion enclosure, you need only specify the ID of the expansion enclosure and the ID of the slot in which a physical disk resides. For a non-dense expansion enclosure, an alternative method for identifying a location for a physical disk is to specify the ID of the expansion enclosure, set the ID of the drawer to 0, and specify the ID of the slot in which a physical disk resides.

    After power cycling the physical disk, the RAID controller must verify the physical disk to be functional before it can be placed back into use. If the physical disk cannot be verified it is marked as a failed physical disk. Power cycling a failed physical disk requires global hot spare physical disks and full copy back to a replacement physical disk after it is brought into service.

    Failed physical disks cannot be reset by a power cycle more than once in a 24 hour period, and in some cases cannot be reset more than once. Thresholds and counters for physical disk power cycles are kept in persistent storage, and are included in state capture data. Informational events are logged when a physical disk is power cycled.

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