This document provides NI options for configuring a PXI system to offer removable storage.
To deploy test and measurement systems in classified areas, you often need these systems to have an associated declassification process. Declassifying a PXI system requires knowledge of all its memory components, including the chassis, controller, and modules.
PXI embedded controllers feature nonvolatile storage in the form of a hard drive or a flash drive that retains user and system information even after the system is powered down. Because nonvolatile storage is required for the PXI embedded controller to operate, the PXI system should offer the ability to remove this storage media so that it can be placed in a secure environment.
The process for declassifying a PXI system is straightforward. PXI chassis from NI do not contain any memory devices that are user-accessible. You can clear the user-accessible volatile memory components on all NI PXI modules by simply powering down the PXI system. The nonvolatile memory components on NI PXI modules retain their contents when powered down; however, these are not user-accessible
Nonvolatile storage is required for the PXI embedded controller to operate. Accessible removable storage offers the ability to remove this storage media so that it can be placed in a secure environment.
Some situations require different software images within the same system hardware. With removable storage, you can have separate, unique software images loaded on multiple hard drives that could be used on the same station. This advantage is necessary in multiple user situations.
Removable storage gives you the ability to field-replace hard drives ensuring maximum uptime for PXI systems.
All solutions presented below fulfill these requirements.
NI offers a PXI Express embedded controller with front panel accessibility to the hard drive. These controllers have a carrier that can be removed from the front of the controller and are available in several rotating drive and solid-state drive options.
Figure 1. NI PXIe-8135 With Front Panel Removable Storage
This controller is also offered with an eSATA accessory, allowing you to interface out to an eSATA external drive.
NI PXIe-8135 With Removable Drive | |
Processor | Intel Quad-Core i7-3610QE |
CPU Frequency | 2.3 GHz (3.3 GHz Turbo-Boost Mode) |
Cores | 4 |
Memory (Standard) | 4 GB (1x 4 GB), 1600 MHz DDR3 |
Memory (Maximum) | 8 GB (1x 8 GB), 1600 MHz DDR3 |
USB | 4 USB 2.0, 2 USB 3.0 |
Ethernet | 2 Gigabit |
Hard Drive Options | 250 GB (or Greater) 7200 RPM |
80 GB (or Greater) SSD | |
100 GB (or Greater) eMLC SSD | |
250 GB (or Greater) SSD |
Table 1. NI PXIe-8135 With Removable Drive Features
NI offers rack-mount controllers in various configurations that have front-side removable hard drives. These controllers have one expansion slot that you can populate with an MXI-4 or MXI-Express remote controller for either PXI or PXI Express chassis. Table 3 summarizes the different configurations and Table 4 states how this solution performs with respect to the outlined requirements.
Figure 2. NI 8352 Rack-Mount Controller With Front-Side Removable Hard Drives
NI 8354 | NI 8355 | |
Processor | E5620 | E6600 |
CPU Frequency | 2.4 GHz | 2.4 GHz |
Cores | up to 8 | 2 |
FSB | 1066 MHz | 1066 MHz |
L2 Cache | 8 MB | 4 MB |
Memory (Standard) | 1 GB (2 x 512 MB), 667 MHz | 1 GB (2 x 512 MB), 667 MHz |
Memory (Maximum) | 4 GB (4 x 1 GB), 667 MHz | 4 GB (4 x 1 GB), 667 MHz |
Hard Drive (Standard) | 4 x 250 GB (RAID-0) | 2 x 250 GB (RAID-0) |
Hard Drive (Maximum) | 4 x 250 GB (RAID-0) | 4 x 250 GB (RAID-0) |
Ethernet | 2 Gigabit | 2 Gigabit |
USB | 4 (2.0) | 4 (2.0) |
Drive | DVD-ROM | DVD-ROM |
Table 3. NI 835x Rack-Mount Controllers With Removable Hard Drives