HP IO Accelerator Driver and Management Software Version 3.2.3 Release Notes
System requirements 7
System requirements
Hardware requirements
IMPORTANT: For complete hardware requirements and installation instructions, see the HP IO
Accelerator Hardware Installation Guide.
Sufficient system memory (RAM)
The amount of RAM the driver requires varies, according to the average block size written to the device.
Using the average block size in the following table, you can estimate the amount of system memory needed.
CAUTION:
Some operating systems only support 512 byte sector sizes. These operating systems
include ESX and ESXi. For more information, see the "fio-format" section in the HP IO Accelerator
User Guide for your operating system.
IMPORTANT: Depending on your operating system, you can reduce worst-case memory use by
formatting your IO Accelerator Gen1 device with a 4 KB sector size and thereby force the
average written block size to be 4 KB or greater. However, some operating systems do not allow
4K sector sizes.
Even if you cannot force 4 K sector sizes, the average write I/O size for most workloads is 4 KB or larger.
For this reason, a 4 KB average write size is typically the most accurate representation of memory utilization.
At various block sizes, the following table shows the upper limit of RAM that might be required of your system
for every 100 GB of IO Accelerator Gen1 and IO Accelerator Gen2 device storage space used.
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
requirements for 160 GB
IO Accelerator*
(Gigabytes)
8,192
250 280 0.5
4,096
400 530 1
2,048
750 1030 1.7
1,024
1450
2000
3.2
512
2850 3970 6.4
Average block
size (bytes)
Minimum system RAM
requirements for 320 GB
IO Accelerator*
(Gigabytes)
Minimum system RAM
requirements for 365 GB
IO Accelerator*
(Gigabytes)
Minimum system RAM
requirements for 1.2 TB
IO Accelerator*
(Gigabytes)
8,192
1 1 3.4
4,096
1.6 1.9 6.4
2,048
3 3.8 12.4
1,024
5.8 7.3 24