Fault Tolerance; Power Supply Requirements For The Serveraid M5014/M5015 Controllers; Fault Tolerance Features - IBM ServeRAID M5014 User Manual

3.3.3

Fault Tolerance

3.3.4 Power Supply Requirements for the ServeRAID M5014/M5015
Controllers
Table 3.5 shows the fault tolerance features of the ServeRAID M5014
and ServeRAID M5015 SAS/SATA controllers.
Table 3.5

Fault Tolerance Features

Specification
1
Support for SMART
Optional Battery Backup for
Cache Memory
Drive Failure Detection
Drive Rebuild Using Hot Spares Automatic
Parity Generation and Checking Yes
1. The Self Monitoring Analysis and Reporting Technology (SMART) detects
up to 70 percent of all predictable drive failures. In addition, SMART
monitors the internal performance of all motors, heads, and drive
electronics.
All power is supplied to the controllers through the PCI Express 3.3V rails
and the 12V rail. Onboard switching regulator circuitry operating from the
3.3V rails and the 12V rail provide the necessary voltages. The following
states determine the typical current consumption of the controller:
•
State 1: During a hard reset
•
State 2: During a disk stress test
•
State 3: While sitting idle at the DOS prompt
Technical Specifications
ServeRAID M5015 SAS/SATA Controllers
Yes
ServeRAID M5000 Series Battery Assembly.
<3.7V/500mAH battery pack; up to 48 hours of
data retention
– Battery-protected backup for up
to 256 Mbytes of data for the
ServeRAID M5014 controller
– Battery-protected backup for up
to 512 Mbytes of data for the
ServeRAID M5015 controller
Automatic
3-7