Desktop Quad PCIe and Storage Expansion Chassis



Rocstor has everything you need to keep your creative computing perform powerfully and efficiently. The Thunderstor™ XD48 Desktop is specifically designed to bring you a powerful combination of a Quad PCIe and an 8-bay storage expandability for your Mac® using Thunderbolt™ 2 connectivity.

Rocstor’s Thunderstor expansion chassis are made in USA and are designed for professionals that demand quality. Video professionals and post-production houses are facing unprecedented challenges. As media technology continues to evolve, projects are getting larger and more complex. It has become necessary to connect multiple cards such as HBA, RAID, or video cards to a Mac© via Thunderbolt™ connection.


  • Desktop expansion chassis form factor
  • Quad PCIe and an 8-bay storage expansion
  • Four x16 (mechanically, x4 electrically) PCIe expansion slots
  • Eight (8) Small Form Factor (SFF) 2.5” hot-swap storage bays
  • ATTO 6Gb SAS RAID Controller which provides RAID 0,1,4,5,6
  • Four (4) Thuderbolt 2 ports
  • USA designed and made. TAA compliant
  • PCIe Expansion cards with computers without PCIe Slots
  • Ultra-quite with virtually no sound using a power supply

The Thunderstor™ XD48 Desktop Thunderbolt™ chassis includes a Quad (4) PCIe expansion slots and eight (8) Small Form Factor (SFF) 2.5” hot-swap storage bays. The ultra-fast storage subsystem is driven by an internal ATTO 6Gb SAS RAID Controller which provides RAID 0,1,4,5,6 user selectable settings via the supplied browser-based GUI. The XD48 Desktop model is an Intel-Certified product featuring four x16 (mechanically, x4 electrically) PCIe expansion slots and quad 20Gbps Thunderbolt-2 I/O ports so other compatible Thunderbolt products may be daisy-chained for the maximum connection flexibility.

The Thunderstor™ XD48 utilizes the ATTO SAS RAID controller which occupies one of the PCIe slots. The performance is exceptionally fast for any professional user utilizing SSD or HDD drives. The XD48 is made in USA and TAA compliant, it also includes an internal forced air cooling and is powered by an internal 460 Watt power supply. 

The Rocstor Thunderstor XD48 has been designed, developed and tested to meet your needs of PCIe and Storage expandability needs by delivering state-of the art full-bandwidth PCIe slots, using two independent Thunderbolt™ 20Gbps bridge circuits. One Thunderbolt™ bridge drives two of the PCIe slots, and the second internal Thunderbolt™ bridge drives the other two PCIe slots. The XD48 advance technology is differentiated from any competition by offering this two independent Thunderbolt Bridge technology.

For its unprecedented expansion and storage speeds, connect the XD48 to the Mac® Pro host computer using two of the four available Thunderbolt ports on the chassis and then use the third or fourth available ports for expansion or daisy-chain of other Thunderbolt devices. The XD48 supports all compatible PCIe cards, up to full-height and full-length peripherals. It provides extra DC power connections for GPUs requiring those additional connections.

The advance architectural design of Thunderstor™ XD48 enhances operating bandwidth for demanding applications that utilizes all the 20Gbps bandwidth available from each Thunderbolt port. The XD48 with its internal hardware ATTO (SAS) RAID controller and eight RAID drives (rotating or SSD) can operate at “full speed” up to (1200+ MB/s transfer rates) using one bus while other demanding peripherals can operate at full speed using the other bus. Using popular SFF SSDs in the RAID easily provides sustained data transfer speeds of up to or greater than 1200 MB/s for “working” files.

Thunderstor XD48 uses the best in class RAID controller from ATTO ® Technologies. The XD48 utilizez the ATTO ® ExpressSAS ® R608 6Gb/s SAS RAID Adapters which adds high-performance RAID protection to the built-in 8-bay SFF SAS storage. Delivering significant advancements in performance and flexibility with enterprise-class features, ExpressSAS ® 6Gb/s SAS RAID adapters provide the industry’s largest ECC protected cache memory in an affordable RAID solution for general IT and media and entertainment environments.

Thunderstor™ XD48 Internal ATTO® RAID Controller Specification

  • 8 internal ports in a low-profile form factor
  • 1GB ECC protected cache memory
  • 8x PCIe 2.0 / PCIe 3.0 compatible host connection
  • 9.6GB/s throughput in full-duplex mode
  • SAS 2.0, SAS connectivity
  • Supports RAID Levels 0, 1, 4, 5, 6, 10 50, 60 and DVRAID™, an advanced RAID level for digital video environments
  • Advanced Data Streaming (ADS™) Technology
  • DriveAssure™ Technology
  • CacheAssure™ Technology
  • Adaptive Path Optimization available to provide redundancy in storage connections
  • Data Recovery Mode for additional data protection
  • Windows®, Linux and Mac® OS X driver support
  • Easy-to-use GUI-based configuration utility
  • Thunderbolt®-aware driver for Mac OS X 10.6.8 & above and Windows 10, 8.1, 8, & 7


Desktop Quad PCIe and Storage Expansion Chassis
Unit Physical Characteristics

Color: High-Gloss Black

Length: 16″

Width: 7”

Height: 9.5″

Weight (Approximate): 22 lbs (not including installed PCIe peripheral cards or disk drives)

Shipping Dimensions: Length: ”

Width: ”

Height: ”

Weight (Approximate):  lbs


PN Model Size RPM Cache UPC
T522xx-01 Thunderstor XD48 No Drives 0   85392000097
T522U7-01 Thunderstor XD48 8 TB 7200 32 MB 85392000098
T522V7-01 Thunderstor XD48 16 TB 7200 128 MB 85392000099
T522NN-01 Thunderstor XD48 8 TB SSD   87691000000
T522PP-01 Thunderstor XD48 16 TB SSD   87691000001

Specification Brochure:
Specification Brochure (click here)

User Manuals:
User Manuals (click here)

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