Rhino Jr 21S
Dual removable 2.5-inch hard drives/SSDs for 3.5-inch bay


Government agencies and SMB organizations that require effective removable drive enclosures to store, transport, and protect their sensitive data rely on the CRU Rhino® Jr RJ21S.

These two carriers receive any capacity 2.5" (9.5mm) SATA hard drives and solid-state drives (SSD). The frame mounts in the standard 3.5" bay drives found in desktops and workstations.

The RJ21S enables fast drive swapping for additional storage with our TrayFree™ technology.

Metal hard drive carriers provide reliable data protection for the RJ21S. These enclosures are engineered and warranted for over 50,000 insertions using durable connectors.

The RJ21S operates at speeds up to 6 Gbps using 6 Gbps hard drives and host controllers.

Secure your data with the key lock to prevent unauthorized access to your drive or accidental removal during operation.

Additional features:

  • Power and drive activity LEDs
  • 3-year warranty
  • Free lifetime phone tech support

The RJ21S removable drive carriers and frames will provide you with reliable performance while protecting your data.

Specs at a glance Full Product Specs >

Drive Types Supported
  • SATA 2.5" drives
  • SAS 2.5" drives
SATA Speed 6G
Insertion Rating up to 50,000 drive insertions
Dimensions 5.51" x 4.02" x 0.98" (140mm x 102mm x 25mm)

Part Numbers


Fits in a 3.5in PC bay; accepts two 2.5in SATA or SAS HDDs or SSDs; TrayFree drive access; SATA 6G host connection

part #: 6710-6500-9500
Ships in: 1-2 Days


Spacer for 7mm drive

Converts a 2.5in SSD or HDD with 7mm height to a 9.5mm height

part #: 2836-0000-10
Call 1-360-816-1800 or email us for ordering information for this item


Product name Rhino Jr 21S
Host (I/O) Ports (2) SATA: up to 6 Gbps
Drive Types Supported
  • SATA 2.5" drives
  • SAS 2.5" drives
SATA Speed 6G
Bay Type TrayFree
Insertion Rating up to 50,000 drive insertions
Number of bays 2
Lockable Bays Rotate/Press
Number of LEDs 2
Description of LEDs Power, drive activity
Construction material(s) Durable metal construction
Dimensions 5.51" x 4.02" x 0.98" (140mm x 102mm x 25mm)
Weight 0.63 lbs. (0.29 kg)
Compliancy FCC, CE, RoHS
Warranty CRU provides a 3-year limited warranty for this product.
Technical Support Your investment in CRU products is backed up by our free technical support for the lifetime of the product. If you need to contact us for any reason, visit cru-inc.com/support or call us at 1-800-260-9800 or +1-360-816-1800.

Product Images


A9-110-0004-1_Rev1.2_RJ 21S_UserGuide.pdf
Oct 20, 2016 - 158.43 KB
User Guide for Rhino Jr RJ21S

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