The Uctronics 1U Rack Mount is designed to house five Raspberry Pi boards and five 2.5” SSDs (7mm thickness).Your boards and SSDs are mounted in the
GitHub - pawl/raspberry-pi-1u-server: A low power 1U Raspberry Pi cluster server for inexpensive colocation.
UCTRONICS 19″ 1U Raspberry Pi Rackmount, 2.5″ SSD Bracket Hold Up to 5 Raspberry Pi 4B Boards - Robotools
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UCTRONICS U6261 19? 1U Raspberry Pi Rack Mount with SSD Mounting Brac
19 1U Raspberry Pi Rackmount, SSD Bracket for Any 2.5 Ssds, Hold up to 5 Raspb
UCTRONICS Raspberry Pi Rackmount Complete Enclosure Version 2.0 with PoE Functionality, Front Removable 19 1U Rack Mount with C - AliExpress
Cluster Enclosure for 4x Raspberry Pi, UCTRONICS AC-RM0002
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UCTRONICS Front Removable 1U Rack Mount for India