The HP Smart Array P812 is HP's 24 port Serial Attached SCSI (SAS) RAID controller with PCI Express (PCIe). This high performance SAS RAID controller provides high levels of reliability for HP servers through its support of 6 Gb/s SAS and 3 Gb/s SATA technology, 1 GiB FBWC, and advanced RAID capabilities. This controller ships standard with a Smart Array Advanced Pack license key and supports up to 108 hard drives.

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Dimensions	12.3 in x 4.4 in x 0.5 in (31.1 cm x 11.1 cm x 1.2 cm)
PCI Card Size	Full-height, full-length PCI Express
PCI Label	PCIe2 x8 (i.e., x8 mechanical, up to x8 electrical)
PCI Link Rate	x8 5 GT/s PCI Express (4 GB/s maximum bandwidth in each direction)
SAS/SATA Connectivity	2 Mini SAS 4i connectors 4 Mini SAS 4x connectors
SAS/SATA Link Rate	SAS protocol: 6 Gb/s, 3 Gb/s, or 1.5 Gb/s SATA protocol: 3 Gb/s or 1.5 Gb/s
SAS/SATA Performance	Controller supports a maximum of 4.8 GB/s maximum bandwidth in each direction (allocated across all the connectors)
RAID Cache	1 GiB capacity (not all of which is available for user data) 64-bit data width with 8-bit error correcting code (ECC) Flash-backed on power loss Tether to capacitor pack Removable
RAID Cache Bus Speed	DDR2-800 (6.4 GiB/s maximum bandwidth)
Software upgradeable Firmware	Yes
Maximum Drive Count	108 drives (e.g., 108 TB with 108 x 1 TB SATA 3.5" MDL HDD)
System Memory Addressing	64-bit, supporting servers memory space greater than 4 GiB
RAID Support	RAID 6 (Advanced Data Guarding) RAID 60 RAID 5 (Distributed Data Guarding) RAID 50 RAID 1+0 (Striping & Mirroring) RAID 1 (Mirroring) RAID 0 (Striping)
Upgradeable Firmware	Flashable ROM with redundant firmware images