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- 2021.04.12. 08:34
- Forum: Supported Hardware
- Topic: The semaphore timeout period has expired
- Replies: 1
- Views: 9816
The semaphore timeout period has expired
I ran the surface test "read + write test + read (deep test)" on the external hard drive. A message appeared in the middle of the test, namely "Error 121 The semaphore timeout period has expired". What has happened? What does it mean? And what should I do?