 "631674-B21 HP Smart Array P421/2GB Controller" "Null"
 "Description:HP Smart Array P421/2GB FBWC 6Gb2-ports Ext SAS ControllerPart Number(s) Manufacturer Part# 631674-B21"
 Specifications: Category Proliant Controller Sub-Category Smart Array Generation P421/2GB Part Number 631674-B21 Products ID 461059 Manufacturer HP Product Type Storage Controller Host Interface PCI Express 3.0 x8 Controller Interface Type Serial Attached SCSI (SAS) Data Transfer Rate 600MB/s Buffer Size 2GB RAID Level 0 1 5 6 10 50 60 1+0 Drive Support 64 x Logical Memory 2GB ECC DDR3 SDRAM Form Factor Low-Profile Plug-in Card
 "291966-B21 HP Smart Array 641 Controller" "Null"
 "Description:Smart Array 641 Ultra320 Controller with 64MB Cache 64-bit 133MHz PCI-X PC Board - Has one Internal 68-pin connector Can add 128MB Battery Backed Write (BBWC) ModuleSee optional BBWC BelowPart Number(s)Option Part# 291966-B21 Spare 305414-001"
 Specifications: Category Proliant Controller Sub-Category SCSI PCI-X Generation 641 Part Number 291966-B21 Products ID 8591 Board/Module Type Daughterboard Channels 1 Controller Type SCSI Drive Array (RAID) Drive Array Support RAID 0 1 5 10 Included Components Manual Installed Cache Memory 64MB Interface PCI, Ultra SCSI PCI, Ultra SCSI Maximum Cache Memory 128MB Maximum Number of Devices Supported 6 Maximum Transfer Rate 320MB/s System Type Linux, PC