When servers are started simultaneously across multiple
nodes or simulating a local setup, it can happen such
that one of the servers in setup reaches a following
situation where it observes
- Some servers are formatted
- Some servers are unformatted
- Some servers are offline
Current state machine doesn't handle this correctly, to fix
this situation where we have unformatted, formatted and
disks offline we do not decisively know the course of
action. So we wait for the offline disks to change their state.
Once the offline disks change their state to either one of these
states we can decisively move forward.
- nil (formatted disk)
- errUnformattedDisk
- Or any other error such as errCorruptedDisk.
Fixes#4903
- Servers do not exit for invalid credentials instead they print and wait.
- Servers do not exit for version mismatch instead they print and wait.
- Servers do not exit for time differences between nodes they print and wait.
These messages based on our prep stage during XL
and prints more informative message regarding
drive information.
This change also does a much needed refactoring.
* Add unit-tests for formatting disks during initialization
- Fixed corresponding code at places where it was deviating from the
tabular spec.
* Added more test cases and simplified algo
... based on feedback from ``go test -coverprofile``.
