HP B- Accelerators ESXi/ESX Performance attributes, Required operating environment

Performance attributes

IO Accelerator capacity	320GB	640GB
Models AJ878B and
BK836A
NAND type	MLC (Multi Level Cell)	MLC (Multi Level Cell)
Read Bandwidth (64kB)	735 MB/s	750 MB/s
Write Bandwidth (64kB)	510 MB/s	550 MB/s
Read IOPS (512 Byte)	100,000	93,000
Write IOPS (512 Byte)	141,000	145,000
Mixed IOPS* (75/25 r/w)	67,000	74,000
Access Latency (512 Byte)	30 µs	30 µs
Bus Interface	PCI-Express x4	PCI-Express Gen1 x4

IO Accelerator capacity	785GB	1.2TB
Models QK762A and
QK763A
NAND type	MLC (Multi Level Cell)	MLC (Multi Level Cell)
Read Bandwidth (1MB)	1.5 GB/s	1.5 GB/s
Write Bandwidth (1MB)	1.1 GB/s	1.3 GB/s
Read IOPS (Seq. 512 Byte)	443,000	443,000
Write IOPS (Seq. 512 Byte)	530,000	530,000
Read IOPS (Rand. 512 Byte)	141,000	143,000
Write IOPS (Rand. 512 Byte)	475,000	475,000
Read Access Latency	68µs	68µs
Write Access Latency	15µs	15µs
Bus Interface	PCI-Express Gen2 x4	PCI-Express Gen2 x4

*Performance achieved using multiprocessor enterprise server

•Enterprise data integrity

•Field upgradeability

•Green footprint, 7.5W nominal per device

NOTE: MSI was disabled to obtain these statistics.

Required operating environment

The HP IO Accelerator is supported for use in the following operating environments:

•VMware ESX 4.0

•VMware ESX 4.1

•VMware ESXi 4.1

Introduction 7