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Green circuit board with silver bracket and two external VHDCI ports

HP

HP AH627A StorageWorks Dual Channel U320e SCSI Host Bus Adapter PCIe x4

SKU CH-8VPG-D9K43

Dual-channel Ultra320 SCSI host bus adapter with PCIe x4 interface and two external VHDCI ports for tape-library connectivity

  • NAND Flash Memory TypeSLC
  • Dual-channel design connects two external SCSI devices
  • PCI Express x4 host interface fits modern ProLiant servers
  • Ultra320 controller delivers 320 MB/second maximum bandwidth
  • Low-profile 2.7 inch height suits compact chassis
  • VHDCI connectors provide reliable wide SCSI links

Dual-Channel U320 SCSI Host Adapter

The HP AH627A StorageWorks adapter adds two external Ultra320 SCSI channels to a desktop or server through a PCI Express x4 slot. It targets administrators who need to connect HP MSL tape libraries or legacy SCSI storage arrays to modern ProLiant systems without RAID functionality.

Bandwidth and Protocol Limits

Each channel delivers up to 320 MB per second using the Ultra320 SCSI standard while remaining backward compatible with Wide Ultra3 and Wide Ultra2 devices. The PCIe x4 host link caps total throughput, so sustained transfers cannot exceed the bus ceiling even if both ports are active simultaneously.

Low-Profile Plug-In Card With VHDCI Ports

The board measures 2.7 inches by 6.6 inches and uses a standard plug-in card form factor that fits low-profile brackets. Two VHDCI connectors face the rear bracket, allowing dense cable routing in crowded racks but requiring matching VHDCI cables for each attached device.

Points forts

  • Dual-channel design connects two external SCSI devices
  • PCI Express x4 host interface fits modern ProLiant servers
  • Ultra320 controller delivers 320 MB/second maximum bandwidth
  • Low-profile 2.7 inch height suits compact chassis
  • VHDCI connectors provide reliable wide SCSI links

Caractéristiques

BrandHP
NAND Flash Memory TypeSLC

Questions sur cet article

Should I choose the dual-channel U320e model for two external tape libraries or a single-channel card?

The dual-channel U320e provides two independent VHDCI ports so you can connect two separate Ultra320 SCSI devices such as MSL tape libraries without sharing bandwidth.

What does the 320 MB/s figure mean when the card is installed in a ProLiant server?

Each channel can sustain up to 320 MB/s with Ultra320 SCSI drives, so a single tape stream can use the full Ultra320 rate while the second channel remains free for another device.

Does the PCI Express x4 host interface limit the 320 MB/s transfer rate in practice?

The PCIe x4 host interface supplies ample bandwidth for both Ultra320 channels combined, so the SCSI protocol remains the limiting factor at 320 MB/s per channel.

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