User`s guide

3-10 MegaRAID SAS RAID Controller Characteristics
Copyright © 2009 by LSI Corporation. All rights reserved.
3.3.3 Fault Tolerance
Table 3. 6 lists the fault tolerance features for the MegaRAID 6Gb/s SAS
RAID controllers.
3.3.4 Electrical Characteristics
This subsection provides the power supply requirements for the
MegaRAID 6Gb/s SAS RAID controllers.
3.3.4.1 Power Supply Requirements for the SAS 9260 RAID Controllers
All power is supplied to the SAS 9260 RAID controllers through the PCI
Express 3.3V rails and the 12V rail. Onboard switching regulator circuitry
Maximum queue tags per drive As many as the drive can accept
Stripe sizes 8 Kbytes, 16 Kbytes, 32 Kbytes, 64 Kbytes,
128 Kbytes, 256 Kbytes, 512 Kbytes, or
1Mbyte
Maximum number of concurrent
commands
255
Table 3.5 Array Performance Features (Cont.)
Specification
MegaRAID SAS 9260 and SAS 9280
RAID Controllers
Table 3.6 Fault Tolerance Features
Specification
MegaRAID SAS 9260 and SAS 9280 RAID
Controllers
Support for SMART
1
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.
Ye s
Optional battery backup for
cache memory
LSIiBBU07 battery backup. <3.7V/1350mAH
battery pack; up to 72 hours of data retention
for 512 Mbytes
Drive failure detection Automatic
Drive rebuild using hot spares Automatic
Parity generation and checking Yes