Sas Features - IBM ServeRAID M5014 User Manual

1.6.1

SAS Features

1-10
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ServeRAID M5015 controller - Support for 512-Mbyte 72-bit DDR2
800 MHz on-board SDRAM intelligent battery backed module
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Two internal connectors
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Support for RAID levels 0, 1, 5, 6, 10, 50, and 60
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Advanced array configuration and management utilities
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Online RAID level migration
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Drive migration
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Drive roaming
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Media scan
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No reboot necessary after expansion
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More than 200 Qtags per array
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User-specified rebuild rate
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32-Kbyte nonvolatile random access memory (NVRAM) for storing
RAID system configuration information; the MegaRAID SAS firmware
is stored in flash ROM for easy upgrade.
The following list describes the SAS features of the ServeRAID M5014
and ServeRAID M5015 controllers:
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Provides eight fully independent PHYs
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Supports 6.0 Gb/s SAS data transfers per PHY
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Supports SSP to enable communication with other SAS devices
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Supports SMP to communicate topology management information
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Provides a serial, point-to-point, enterprise-level storage interface
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Simplifies cabling between devices
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Provides a scalable interface that supports up to 240 devices through
the use of expanders
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Supports wide ports consisting of 2, 3, or 4 PHYs within a single
quad port
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Supports narrow ports consisting of a single PHY
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Transfers data using SCSI information units
Overview