The National Instruments 784191-01 PXI Data Storage Module, also known as the HDD-8261, is engineered to support high-speed data streaming applications. Featuring a Marvel 88SE9485 SATA chipset, this module combines the capabilities of four HDDs, each with a capacity of 4 TB or greater, and six SSDs, each capable of reaching 2.8 TB or more. Utilizing the Serial-ATA 3.0 interface, the module enhances in-chassis data streaming rates, making it ideal for applications that necessitate substantial storage and bandwidth. It achieves read and write speeds of up to 2 GB/s for SSDs and up to 250 MB/s across 80% of the striped RAID 0 array for the HDDs.

The 784191-01 is designed as a three-slot, 3U PXI Express module, measuring 2.4 inches by 5.1 inches by 8.5 inches, and requires one PXI Express module slot along with two additional expansion slots for optimal performance. It complies with the CompactPCI Express specification and has a total weight of approximately 1490 g, derived from 750 g for four HDDs and 740 g for six SSDs. The operating temperature for HDDs ranges from 5 to 50 °C, while the SSDs function effectively from 0 to 50 °C. For storage purposes, HDDs can be housed between -40 to 65 °C and SSDs between -40 to 71 °C, with an optimal relative humidity range of 5% to 95%. The device is intended exclusively for indoor use and operates effectively at altitudes up to 2000 meters.