HP IO Accelerator for BladeSystem c-Class Solaris User Manual download pdf (Page 10)

Introduction 10

• Sufficient RAM to operate—The amount of RAM that the driver requires to manage the NAND flash

varies according to the block size you select when formatting the device (filesystem format, not low-level

format). For a virtual machine using an IO Accelerator directly (using PCI pass-through), consult the user

guide for the installed operating system. The following table lists the amount of RAM required per

100GB of storage space, using various block sizes. The amount of RAM used in driver version 3.0 is

significantly less than the amount used in version 1.2.x.

Average block size

(bytes)

RAM usage for each 80

GB IO Accelerator

(Megabytes)

RAM usage for each 100

GB IO Accelerator

(Megabytes)

Minimum system RAM

requirement for 320 GB

MezzIO Accelerator*

8,192

250 280 1 GB

4,096

400 530 1.6 GB

2,048

750 1,030 3 GB

1,024

1,450 2,000 5.8 GB

512

2,850 3,970 11.4 GB

Average block size

(bytes)

Minimum system RAM

requirement for 640 GB

MezzIO Accelerator*

Minimum system RAM

requirement for 785 GB

MezzIO Accelerator*

Minimum system RAM

requirement for 1.2 TB

MezzIO Accelerator*

8,192

2 GB 2.2 GB 3.4 GB

4,096

3.2 GB 4.2 GB 6.4 GB

2,048

6 GB 8.1 GB 12.4 GB

1,024

11.6 GB 15.7 GB 24 GB

512

22.8 GB 31.2 GB 47.6 GB

* For IO Accelerator use only. Additional RAM is needed for system operating system and applications.

HP PCIe IO Accelerator Duo requirements

In addition to the IO Accelerator cooling and RAM requirements listed in the previous table, the IO

Accelerator Duo requires at least:

• A PCIe Gen1 x8 slot or a PCIe Gen2 x4 slot

• A minimum of a full-height, half-length slot with a x8 physical connection. For systems with PCI 1.1, all

eight signaling lanes must be active for full IO Accelerator Duo performance. For systems with PCIe 2.0,

only four signaling lanes must be active for full performance.

NOTE: With driver version 3.1.0 and later, the driver detects in the BIOS if the PCIe slot supports

a 75W power draw. If the slot supports up to 75W, the IO Accelerator device draws up to that

amount of power. However, if an external power cable is used, power is only supplied by that

cable.

To verify whether a slot is supplying 75W, view the system logs or use the fio-pci-check

utility.

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HP IO Accelerator for BladeSystem c-Class Solaris User Manual Page 10

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