Pegasus2 R2+ Unreadable Disk Warning

  • Last Post 14 October 2021
Isabel Gonzalez posted this 14 October 2021

I'm running MacOS High Sierra 10.13.6. My Pegasus2 R2+ drive was mounting fine until yesterday when suddendly it won't mount at all. I can't see it in the disk utility either.

When I connect it to the Mac I get an Unreadable disk warning: "The disk you inserted was not readable by this computer." 

When I go to my system information on the Thunderbolt device I get the following:

Pegasus2 R2+:


  Vendor Name: Promise Technology, Inc.

  Device Name: Pegasus2 R2+

  Vendor ID: 0x2

  Device ID: 0xC

  Device Revision: 0x1

  UID: 0x0002000000279650

  Route String: 1

  Firmware Version: 25,1


Port (Upstream):

 Status: Device connected

 Link Status: 0x2

 Speed: Up to 20 Gb/s x1 Current Link Width: 0x2

 Cable Firmware Version: 1.1.0

 Link Controller Firmware Version: 0.14.0



Status: No device connected

Link Status: 0x7

Speed: Up to 20 Gb/s x1

Current Link Width: 0x1

Link Controller Firmware Version: 0.14.0

Isabel Gonzalez posted this 14 October 2021