Logic MegaRAID Enterprise User's Guide

Chapter 4 Features
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4 Features
MegaRAID Enterprise 1600 64-Bit LVD has four SCSI channels that support 160M and Wide
SCSI, with data transfer rates of up to 160 MB/s per SCSI channel. Each SCSI channel supports up
to 15 Wide devices and up to seven non-Wide devices.
Features
MegaRAID features include:
•
remote configuration and array management through MegaRAID WebBIOS
•
high performance I/O migration path while preserving existing PCI-SCSI software
•
SCSI data transfers up to 160 MB/s
•
synchronous operation on a wide LVD SCSI bus
•
up to 15 LVD SCSI devices on the wide bus
•
up to 128 MB of 3.3V SDRAM cache memory in one single-sided or double-sided DIMM socket
(Cache memory is used for read and write-back caching and for RAID 3 and RAID 5 parity generation.)
•
NVRAM storage for RAID configuration data
•
audible alarm
•
DMA chaining support
•
separate DRAM bus
•
support for differential or single-ended SCSI with active termination
•
up to 12 MegaRAID Enterprise 1600 adapter cards per system
•
support for up to 15 SCSI devices per channel
•
support for RAID levels 0, 1, 3, 5, 10, 30, and 50
•
span depth of eight for RAID 1, 3 or 5 arrays
•
support for scatter/gather and tagged command queuing
•
ability to multithread up to 256 commands simultaneously
•
support for multiple rebuilds and consistency checks with transparent user-definable priority setting
•
support for variable stripe sizes for all logical drives
•
automatically detection of failed drives
•
automatic and transparent rebuild of hot spare drives
•
hot swap of new drives without taking the system down
•
optional battery backup for up to 72 hours of data retention
•
server clustering support
•
optional firmware provides multi-initiator support
•
server failover
•
software drivers for major operating systems
SMART Technology
The MegaRAID Self-Monitoring Analysis and Reporting Technology (SMART) detects up to 70%
of all predictable drive failures. SMART monitors the internal performance of all motors, heads,
and drive electronics. You can recover from drive failures through RAID remapping and online
physical drive migration.