Array disk drive modules

Menu path

Fields

DDM serial number (Real-time only)

The 16-digit disk serial numbers that are associated with the eight storage devices in the array site. The ordering of the serial numbers determines the array site position attribute of the storage device.

Location

The location code of the disk drive module.

State (Real-time only)

This value reflects the current DDM status for all DDMs in the array. This value will be one of the following:

• Normal — The DDM is operational and functional in its current disk usage. If it is configured as a spare or array member, there are no unusual operations in progress.
• Installing — A new DDM has been discovered. It is either a replacement DDM for a failed DDM or it is additional capacity that is being added to the storage unit.
• Verifying — The DDM is made accessible to the device adapter, its characteristics are determined, cabling is checked, and diagnostics are run.
• Formatting — A verified DDM requires low-level formatting and the formatting operation is in progress.
• Initializing — The DDM is being initialized with all zero sectors. This is required so that the DDM can be added to an array without regenerating parity.
• Certifying — The DDM is being read accessed to determine that all sectors can be read. If a bad sector is detected, an alternate sector replaces the bad sector.
• New — The storage device is new and integration of the DDM into the system has not begun.
• Missing — The storage device is missing. The DDM has been pulled out from the system and removal has not been processed by the system.
• Rebuilding — Sparing has occurred and this formerly spare DDM is being rebuilt with data from the array for which it is now a member.
• Migration Target — DDM migration is migrating another array member storage device to this spare storage device.
• Migrating Source — DDM migration is migrating this array member DDM to another spare storage device.
• Failed — The storage device has failed and an immediate repair action is required. If spares are available, sparing has been initiated if this DDM was an array member.
• Removed — The storage device is removed. The DDM is not in the system and its removal has been processed by the system.
• Prepared for service — The storage device is prepared for service (for example, going offline or quiescing). The DDM can safely be pulled out without causing any adverse effects.
• Missing, failed — The storage device is missing and the previous state of the device was “Failed” before it was pulled out.
• Removed, failed — The storage device is removed from the system and removal has been processed by the system. The previous state was “Missing, failed.”
• Inappropriate — The storage device is inappropriate for the system. For example, a storage device that is of the wrong capacity or RPM. The DDM is not failed as it may be valid for other systems and locations.
• Interfailed — The resource is operational, but faulty. The resource will fail soon and should be replaced as soon as possible.
• Failed - Deferred Service — The DDM has failed and a repair action is not immediately required. If this DDM was an array member, sparing has been initiated and there are sufficient spares at the time of this failure to allow the service to be deferred.

DDM Usage (Real-time only)

The DDM usage indicates the way that the DDM is currently being used.

• Unassigned — The DDM is not assigned to an array site.
• Unconfigured — The DDM is assigned to an array site, but the array site is not configured and the DDM is not a required spare.
• Spare-Required — The DDM is assigned to an array site and is a required spare.
• Spare-Not Required — The DDM is assigned to an array site that is configured with an array and a spare, but the spare is not a required spare.
• Array Member — The DDM is assigned to an array site that is configured and the array site position of the DDM makes it part of the array.

Disk capacity

The storage capacity of the disk in gigabytes.

Disk RPM

The disk revolutions per minute (for example, 15 000).

Disk Class

The disk class, either enterprise or near-line. Enterprise is a high end disk drive and has the highest reliability. Near-line is a lower end disk drive, and has lower reliability than enterprise disk drives.