The Storage view organizes the Data Domain system storage so that you can view disks by usage type (Active, Archive, Failed, and so on), operational status, and location. The system is automatically scanned and inventoried so that the status and inventory are shown for all enclosures, disks, and RAID groups.
The following topics are covered:
u Viewing System Storage Information on page 38 u Physically Locating a Disk on page 42
u Configuring Storage on page 42
Viewing System Storage Information
This topic describes how to view system storage information with DD System Manager. Procedure
1. Select a system in the navigation panel. 2. Select Hardware > Storage.
The Storage view Status area shows the current status of the storage, such as Operational or Non-Operational, and any active alerts, which can be clicked to view alert details.
Results
The Status area presents the following information. Table 5 Storage System Status
Item Description
Status Storage system status can be one of the following:
l Normal—System operational (green). All disks in the system are in good condition.
l Warning—System operational (yellow). The system is operational, but there are problems that need to be
Table 5 Storage System Status (continued)
Item Description
corrected. Warnings may result from a degraded RAID group, presence of foreign storage, or failed or absent disks. l Error—System non-operational (red). The system is not
operational.
Operational Drives Count of drives operating normally:
l Total—Total number of drives operating. l In-Use—Number of drives the system is using.
l Spare—Number of spare drives (that can be activated if an in-use disk fails).
Non-Operational Drives Count of drives that are not operating normally. l Total—Total number of non-operational drives. l Failed—Number of known failed drives. l Absent—Number of slots without drives.
l Foreign—Number of foreign or unsupported drives. l Unknown—Number of new disks in a shelf.
Below the Status area are tabs that organize how the storage inventory is presented.
Storage Overview
The Overview area displays information for all disks in the selected Data Domain system organized by type. The categories that display are dependent on the type of storage configuration in use. The Overview section lists the storage that is found, and can include the following sections. You can expand each of these sections to display detailed
information: u Active Tier
Disks in the Active Tier are currently marked as usable by the Data Domain file system. Sections are organized by Disks in Use and Disks Not in Use.
u Retention Tier
If the optional EMC Data Domain Extended Retention (formerly DD Archiver) license is installed, this section shows the disks that are configured for Extended Retention storage. Sections are organized by Disks in Use and Disks Not in Use. For more information, see the EMC Data Domain Extended Retention Administration Guide. u Usable Disks and Enclosures
For systems with optional enclosures, this section shows the disks and enclosures that can be added to the system.
u Fail/Foreign/Absent Disks (Excluding Systems Disks)
Shows the disks that are in a failed state; these cannot be added to the system Active or Retention tiers.
u Systems Disks
Shows the disks where the DD OS resides when the Data Domain controller does not contain data storage disks.
Each section heading displays a summary of the storage configured for that section. The Summary shows tallies for the total number of disks, disks in use, spare disks,
reconstructing spare disks, available disks, and known disks.
Clicking the plus (+) icon for a section shows information about the status and content of the storage that is present.
Sections with the Disks In Use section show the Disk Group Status tallies and a table with the following information:
Table 6 Disk Group Status
Item Description
Disk Group The name of the disk group that was created by the file system (for example, dg1).
Status The status of the disk (for example Normal, Warning). Disks Reconstructing The disks that are undergoing reconstruction, by disk ID (for
example, 1.11).
Total Disks The total number of usable disks (for example, 14). Disks The disk IDs of the usable disks (for example, 2.1-2.14). Sections with a Disks Not in Use section show the Disks Status tallies and a table with the following information:
Table 7 Disk Status
Item Description
Disk The disk identifier. It can be:
l The enclosure and disk number (in the form Enclosure.Slot). l A gateway disk (devn).
l A LUN.
Status The status of the disk, for example In Use, Available, Spare. Size The data storage capacity of the disk when used in a Data
Domain system.a
Manufacturer/Model The manufacturer’s model designation. The display may include a model ID or RAID type or other information depending on the vendor string sent by the storage array.
Firmware The firmware level used by the third-party physical-disk storage controller.
Serial Number The manufacturer’s serial number for the disk.
a. The Data Domain convention for computing disk space defines one gibibyte as 230 bytes, giving a different disk capacity than the manufacturer’s rating.