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Administrator Guide

ManualsBrandsDell ManualsStorageDell EqualLogic PS M4110
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Table Of Contents
Field Description Shortcut
• Channel cards — Channel card number, status, rmware revision, and initial
(init) revision. Channel card 0 is on the right, channel card 1 is on the left.
• EIP card — Status and rmware revision. Only one per member.
Member Space Panel
Table 317. Member Space Panel
Field Description
Total Total capacity of the RAID set in the member
Used by volumes Total member space used by volumes
Used by snapshots and replicas Total member space used for snapshots and replicas
Free member space Free space in the member
Member space utilization Chart depicting the capacity-usage metrics
NOTE: Total member capacity does not include the space in spare disk drives because the member uses spare disk drives
only if a failure occurs. Member capacity depends on the number and size of the installed disks and the selected RAID
policy.
NOTE: If free member space is low, you can increase the member capacity by adding disk drives (if empty slots are
available) or by replacing the current drives with higher-capacity drives. You can also add more group members to
increase overall group capacity.
On compression-capable members, the following information is also available:
Table 318. Snapshot and Replica Set Compression
Field Description
Expanded Size The space required if all compressed snapshots stored on that member were rehydrated.
Compressed Size The space currently being used by all compressed snapshots on that member.
Space Savings The total amount of space savings; the dierence between the Expanded Size and the
Compressed Size.
Memory Cache Panel
Table 319. Memory Cache Panel
Field Description Shortcut
Cache mode Cache mode for the active control module. The options are:
• Write-back — The member stores data in the cache until it is written to disk
drives, which can improve performance. The cache battery protects the data in
the cache. The member mirrors cache data across the two control modules,
providing additional data protection.
• Write-through — The member immediately writes data to the disk drives, which
might decrease performance.
None
Use write-through mode
if only one controller is
functional
If you enable this policy on a member with a single control module, the cache always
uses write-through mode. If you disable this policy (the default), under non-failure
conditions, the cache uses write-back mode.
Alt+U
Reference: GUI Panels, Wizards, and Dialog Boxes
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