Acer PCI to Ultra SCSI RAID Controllers DAC960PG Manuel d'utilisateur télécharger pdf (Page 37)

Battery Backup Unit Option

Manual No. 775012 A-5

Operation

Battery Conditioning Prior to Use

Battery conditioning is automatic. There are no manual procedures for

battery conditioning or preconditioning to be performed by the user.

Set-up – Enabling the Write-Back Cache

The write-back cache is enabled by toggling the write-back/write-through

mode switch. The write-back/write-through mode switch is accessed in the

Onboard Configuration Utility, RAID EzAssist, or in GAM. Refer to the

RAID EzAssist Configuration Utility User Reference Guide or the Global

Array Manager Client Software Installation Guide and User Manual for

instructions on how to examine and change the mode switch.

Battery Backup Capacity

Battery backup capacity is defined as the maximum duration of a power

failure for which data in the cache can be maintained by the battery. The

BBU’s backup capacity varies with the memory configuration installed on

the DAC960PG or DAC960PJ. Battery backup capacity can be reasonably

expected according to Table A-1

Table A-1. BBU Capacity vs. Cache Memory Configuration

Capacity Mem Type Battery Backup Duration

Typical Minimum

4 MB EDO ECC RAM 72 hours 40 hours

8 MB EDO ECC RAM 40 hours 20 hours

16 MB EDO ECC RAM 68 hours 28 hours

32 MB EDO ECC RAM 30 hours 14 hours

64 MB EDO ECC RAM 35 hours 23 hours

128 MB EDO ECC RAM 20 hours 12 hours

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 85 86

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Acer PCI to Ultra SCSI RAID Controllers DAC960PG Manuel d'utilisateur Page 37