Hp StorageWorks 3000 RAID Array Bedienungsanleitung PDF herunterladen (Seite 61)

RAID Array 3000 Controller 2-19

Compaq Confidential – Need to Know Required

Writer: Bob Young Project: RAID Array 3000 Controller Shelf Hardware User’s Guide Comments:

Part Number: EK-SMCPQ-UG. D01 File Name: c-ch2 RAID Array 3000 Controller.doc Last Saved On: 12/4/00 1:08 PM

Environmental

The controller incorporates a set of on board sensors to detect abnormal

operating conditions that may affect data safety.

Backup Power Management

The controller must be connected to the UPS to prevent the subsystem cache

from being corrupted during unexpected losses of power. If no backup power

supply is provided, the controller will remain off-line and reject all I/O

requests with a status of Check Condition/Hardware Error.

During normal operation, the controller AC power is supplied from a line

source through both power cords to both power supplies. Conditions of poor or

no power cause the following UPS responses:

Table 2-5

Response to Various AC Power Conditions

Condition Response

Low line voltage

UPS compensation circuit automatically increases output

voltage, without placing load on the UPS battery.

No line voltage

(AC loss)

UPS switches to the battery, which supplies power to the

controller maintaining full functionality.

UPS signals controller of impending power down. Caching is

disabled but the controller continues to service host requests

and begins to flush cache to disk.

UPS low-battery

warning

UPS signals controller of impending power down. Subsystem

discontinues host services. Cache flush is completed.

UPS power down

UPS shuts itself off, preventing complete battery discharge. All

data has been written to disk.

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Hp StorageWorks 3000 RAID Array Bedienungsanleitung Seite 61