IBM MegaRAID 8480 manual Array Performance Features, Fault Tolerance Features

3.3.2Array Performance Features

Table 3.4 shows the MegaRAID 8480 Storage Adapter array performance

features.
Table 3.4	Array Performance Features
Specification		MegaRAID 8480 RAID Controller
PCI Express Host Data Transfer		2.5	Gbits/s per lane
Rate
Drive Data Transfer Rate		3.0	Gbits/s per lane
Maximum Scatter/Gathers		26 elements
Maximum Size of I/O Requests		6.4	Mbytes in 64 Kbyte stripes
Maximum Queue Tags per Drive		As many as the drive can accept
Stripe Sizes		8, 16, 32, 64, or 128 Kbyte
Maximum Number of Concurrent		255
Commands
Support for Multiple Initiators		Yes

3.3.3Fault Tolerance

Table 3.5 shows the fault tolerance features of the Megaraid 8480

Storage Adapter.
Table 3.5	Fault Tolerance Features
Specification		MegaRAID 8480 RAID Controller
Support for SMART1		Yes
Optional Battery Backup for		LSIiTBBU02 battery backup. 4.8V/880mAH
Cache Memory		battery pack; up to 72 hours of data retention
		for 256 Mbytes
Drive Failure Detection		Automatic
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 disk drive failures. In addition, SMART monitors the internal performance of all motors, heads, and drive electronics.

3-6	MegaRAID 8480 Storage Adapter Characteristics
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