svc change disk status

[tanjiangyu-ghca]

What this PR does / why we need it:

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

Release note:

[codecov]

Codecov Report

Merging #582 (51bf247) into svc_1027 (7d99180) will decrease coverage by 0.02%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##           svc_1027     #582      +/-   ##
============================================
- Coverage     71.55%   71.52%   -0.03%     
============================================
  Files           181      181              
  Lines         21908    21912       +4     
  Branches       3329     3330       +1     
============================================
- Hits          15676    15673       -3     
- Misses         5164     5166       +2     
- Partials       1068     1073       +5     

Impacted Files	Coverage Δ
delfin/drivers/ibm/storwize_svc/ssh_handler.py	74.43% <80.00%> (+0.13%)	⬆️
delfin/drivers/fake_storage/__init__.py	93.65% <0.00%> (-1.78%)	⬇️