Operation; Battery Conditioning Prior To Use; Set-Up - Enabling The Write-Back Cache; Battery Backup Capacity - Mylex PCI to Ultra SCSI RAID Controllers DAC960PG Installation Manual

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
4 MB
8 MB
16 MB
32 MB
64 MB
128 MB
Manual No. 775012
Mem Type
EDO ECC RAM
EDO ECC RAM
EDO ECC RAM
EDO ECC RAM
EDO ECC RAM
EDO ECC RAM
Battery Backup Unit Option
Battery Backup Duration
Typical Minimum
72 hours 40 hours
40 hours 20 hours
68 hours 28 hours
30 hours 14 hours
35 hours 23 hours
20 hours 12 hours
A-5