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What is an IO Accelerator?

The IO Accelerator is an advanced storage device that uses solid state storage technology (NAND) directly on the PCIe bus, assuring high read and write data rates and accelerated application performance. The associated application performance improvements will have a positive impact on business results and the ability to make decisions quickly, resulting in significant cost and time savings.

What is NAND flash and MLC?

NAND (Not AND) flash memory is a non-volatile storage technology that does not require power to retain data. MLC (Multi-level cell) technology uses multiple levels per cell to allow more bits to be stored using the same number of transistors.

Points to Remember:

HP IO Accelerator for BladeSystem c-Class is NOT to be confused with HP PCIe IO Accelerators for ProLiant Servers.
HP IO Accelerator for BladeSystem c-Class supports ONLY 64-bit operating systems.
HP IO Accelerators cannot be used as hibernation devices.
HP IO Accelerators does not have Boot capability even though its seen in BIOS Boot Controller Order setup screens.

HP PCIe IO Accelerators for ProLiant Servers

HP PCIe IO Accelerators for ProLiant Servers

1. How and where to use PCIe IO Accelerator?
   In lay man terms the PCIe IO Accelerator is similar to a SSD (Solid State Drive), this technology offers benefits of high performance and reliability with no moving parts.

2. How do I make the PCIe IO Accelerator available for data storage?
   In Windows OS, choose Computer Management -> Disk Management -> Select the Disk which is Unallocated and Initialize the disk -> Create a New Volume -> Format Drive -> New Drive Letter Assigned. Now under My Computer you can see the new volume and use it as storage drive.

3. Can I use HP PCIe IO Accelerators instead of hard drives?
   You can use HP PCIe IO Accelerators for storage purpose only but cannot be used as a bootable device so therefore a hard disk is necessary for OS/Drivers installation and booting the server.

4. Can I configure Raid in PCIe IO Accelerator?
   Yes you can configure Raid, please refer to the user guide

Power Cut Module
BladeSystem: The Remote Power Cut Module provides a higher level of protection in the event of a catastrophic power loss (for example, a user accidentally pulls the wrong server blade out of the slot). The Remote Power Cut Module ensures in-flight writes are completed to NAND flash in these catastrophic scenarios. Write performance will degrade without the remote power cut module. HP recommends attaching the remote power cut module for the AJ878B and BK836A SKUs.
The Remote Power Cut Module is only available for the AJ878B and BK836A model. For QK761A, QK762A and QK763A models the Power Cut Module is embedded on the card.
PCIe IO Accelerators for Proliant Servers: The power cut feature is built into PCIe IO Accelerators; therefore, no Remote Power Cut Module is necessary.

IO and Read/Write Performance
HP IO Accelerator for BladeSystem c-Class offers superior IO performance (up to 530,000 IOPs), and high read (up to 1.5 GB/s) and write (up to 1.3 GB/s) performance with MLC models.

HP PCIe IO Accelerators offer superior IO performance up to 892,000 READ IOPS and 935,000 WRITE IOPS, and high throughput up to 3.0 GB/s READ and up to 2.5 GB/s WRITE.

Latency
HP IO Accelerator offers very low latency access to data (as low as 50 microseconds to read a 4K block), in other words a virtually zero seek time compared to rotating magnetic media.

HP PCIe IO Accelerators offer very low latency access to data, as low as 15 microseconds to write a 4K block and as low as 68 microseconds to read a 4K block. In other words, a virtually zero seek time compared to rotating magnetic media