3Ware 9550SXU-16ML User Guide - Page 120

Chapter 6. 3ware Disk Manager (3DM 2) generated based on the measured temperature. In the case of a temperature error, the BBU status will change to "Fault" and the battery will be disconnected electronically. Estimated Backup Capacity. Indicates the estimated backup capacity in hours. This is the amount of time that the battery backup unit can protect the data in the 3ware RAID controller's cache memory. This field is set to zero at the start of a new test and is updated after the test completes. A capacity of zero will also show if the BBU is disconnected and then reconnected. Under optimal conditions, a battery can protect for up to 72 hours. However, with a fresh battery, you may see a higher number in this field. As the battery ages, the backup capacity diminishes. Last Capacity Test. Indicates the date when the last battery test was completed. To test the battery click the Test Battery Capacity link. For details, see "Testing Battery Capacity" on page 208. Battery Installation Date. Indicates when the BBU last detected the battery pack was removed and replaced. 110 3ware 9550SX Serial ATA RAID Controller User Guide