Reference Data Retention Times - LSI iBBU01 User Manual

4.2 Battery Life and Data Retention Time
Table 4.2

Reference Data Retention Times

BBU Name Data Retention Times
LSIiBBU01 72 hours for 512 Mbytes, using five 64 Mx16 parts DDR2 (low power)
LSIiBBU05 - 72 hours for 512 Mbytes, using five 64 Mx16 parts DDR2 (low power)
- 72 hours for 256 Mbytes, using five 32 Mx16 parts DDR2 (low power)
- 72 hours for 256 Mbytes, using three 64 Mx16 parts DDR2 (low power)
- 72 hours for 128 Mbytes, using three 32 Mx16 parts DDR2 (low power)
LSIiBBU06 - 72 hours for 256 Mbytes, using three 64 Mx16 parts DDR2 (low power)
- 72 hours for 128 Mbytes, using three 32 Mx16 parts DDR2 (low power)
LSIiBBU07 - 72 hours for 512 Mbytes, using five 64 Mx16 parts DDR2 (low power)
- 72 hours for 256 Mbytes, using five 32 Mx16 parts DDR2 (low power)
- 72 hours for 128 Mbytes, using five 16 Mx16 parts DDR2 (low power)
LSIiTBBU03 - 72 hours for 512 Mbytes, using five 64 Mx16 parts DDR2 (low power)
- 72 hours for 256 Mbytes, using five 32 Mx16 parts DDR2 (low power)
The MegaRAID utilities display a counter showing the number of times a
BBU has been recharged. When you replace a BBU, you should run the
utility program and reset this counter to zero for the new BBU.
LSI recommends that you replace the battery pack on the BBU once a
year or after 500 recharging cycles, whichever comes first. The warranty
on the battery packs is good for one year.
The data retention times shown in
vary based on a number of factors, including the following:
•
Capacity of the battery pack and the battery load
•
Ambient temperature
•
Age of the battery and number of discharge cycles it has been through
•
Number of DIMMs installed and number of chips on the installed
DIMMs
•
DRAM size
Note: Battery temperatures kept above 45 °C greatly reduce the
life expectancy of the battery.
Copyright © 2006-2009 by LSI Corporation. All rights reserved.
Table 4.2 are approximate. They can
4-3