APC 15000 RAID manual Cache Coherency and Labeling in Dual Mode, Heading Definitions

Controller Installation

Figure 2–6Current Tier Configuration

2.3.6.1Heading Definitions

•Total LUNs. LUNs that currently reside on the tier.

•Healthy Disk. The “health” of the spare disk currently being used (if any is being used) to replace a disk on the listed tier. The health indication for the spare channel that is physically on the listed tier is found under SP H.

•F indicates the failed disk (if any) on the tier.

•R indicates the replaced disk (if any) on the tier.

•Sp H indicates if the spare disk that is physically on the tier is healthy.

•Sp A indicates if the spare disk that is physically on the tier is available for use as a replacement.

•Spare Owner indicates the current owner of the physical spare, where ownership is assigned when the spare is used as a replacement. “RES-#” will appear under the Spare Owner heading while a replacement operation is underway to indicate that unit “#” currently has the spare reserved.

•Spare Used on indicates the tier (if any) where this physical spare is being used as a replacement.

•Repl Spare from indicates the tier (if any) whose spare disk is being used as a replacement for this tier.

NOTE : Tiers are 8+1 mode by default.

2.3.7Cache Coherency and Labeling in Dual Mode

Use the DUAL command to check the status of the units that are healthy and verify that the “Dual” (COM2) and “Ethernet” (LINK) communication paths between the two controller units are established (Figure 2–7).

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