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Internal SSD in optical bay keeps ejecting

Hello all

I have a very frustrating problem. I have a perfectly working ssd  PLEXTOR PX-128M5S. I used it with external enclosure and it worked perfectly. Now i moved it to optical bay to use as a second hard disk  (installed in a apple nonofficial store). When computer boots up it recognizes the second ssd perfectly. If i move files to it (even 100 mb or 500 mb files) i get the message Disk not ejected properly. Then ssd is not recognized in disk utility. Practically the ssd is unusable from this problems. I formated it as macos extended journaled and still the same problem. Formated it as Apfs and still the same problem. Disabled hard disk sleeping and still the same problem. Checked it for errors with disk aid and it says: No errors. Tested it with trim enabled and trim disabled and still the same. How can i resolve this problem?

This are my system specifications:

SSD mounted in optical bay : PLEXTOR PX-128M5S

Macbook pro late 2011. 15 inch

Intel core i7 2.2 ghz

Main system ssd is: SanDisk Ultra II 240GB

Thank You

最后更新：2017-10-09 10:20:49

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