Installation guide

Operation
A-4 DAC960PG/PJ Installation Guide
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, DACCF, or in GAM. Refer to the
DACCF
Utilities Installation Guide and User Manual
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
IBBU’s backup capacity varies with the memory configuration installed on
the DAC960PG/PJ. Battery backup capacity can be reasonably expected
according to Table A-1
Table A-1. IBBU 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