INTEL RAID Controler (Big Laurel 4) PCIe x8, RAID 4x SAS 6Gb/SATA, 512MB, RAID 0/1/5/10

Supports SAS/SATA devices at speeds up to 600 MB/second per port
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Supports the 3 Gbit/s SATA II protocol over SAS transport
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Supports SAS/SATA devices at speeds up to 6 Gb/s per port
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Supports the SATA II protocol over SAS transport
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Contains four internal SAS/SATA ports
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Supports up to 16 SAS/SATA II devices through expanders
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Supports up to 64 virtual disks
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Supports up to 16 arrays
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Supports RAID levels 0, 1, 5, 6, 10, 50, and 60
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Hardware exclusive OR (XOR) assistance
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Online capacity expansion
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Online RAID level migration
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Drive roaming
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Drive migration
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Fast virtual drive initialization
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Hot-spare drive configuration, both private and global
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SATA drive hot-plug
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Staggered spin-up
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Native command queuing
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Support for SMART*
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Auto rebuild with user-specified rebuild rate
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Variable data stripe size configured per virtual drive
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512 MB of ECC DDR2 667-MHz SDRAM integrated on the controller
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Read and write cache policy
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SES2 intelligent enclosure support
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PCI hot-plug support
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Background media scan (patrol read)
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Background data integrity test
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More than 200 Qtags per array