Some drives in E-Series randomly reports "Drive shelf path redundancy lost" after resolving unrecognizable Drive DACStore

• E-Series Systems EF600, EF300
• SANtricity OS
• Drives that meet both of the following conditions are present in the expansion shelf
• Newly added to the expansion shelf
• Initialized in order to write the correct DACstore

• MAJOR-EVENT-LOG randomly detects Drive path redundancy lost

Event type: 282D
Event category: Internal
Priority: Critical
Description: Drive path redundancy lost
Component type: Drive


• In STORAGE-ARRAY-PROFILE > DRIVES,
  • Loss of redundancy is reported to some disk drives
  • Some properties like PRODUCT ID, FIRMWARE VERSION, etc. are missing in some disk drives

Example:

      SHELF, BAY  STATUS              CAPACITY      MEDIA TYPE        INTERFACE TYPE  CURRENT DATA RATE  PRODUCT ID        FIRMWARE VERSION  CAPABILITIES  
      0,    0     Optimal             3,576.982 GB  Solid State Disk  SAS             12 Gbps                                                DA            
      0,    1     Optimal             3,576.982 GB  Solid State Disk  SAS             12 Gbps                                                DA            
      0,    2     Loss of redundancy  3,576.982 GB  Solid State Disk  SAS             12 Gbps            MZILG3T8HCLS-0G4  MS00              DA            
      0,    21    Optimal             3,576.982 GB  Solid State Disk  SAS             12 Gbps            MZILG3T8HCLS-0G4  MS00              DA            
      0,    22    Optimal             3,576.982 GB  Solid State Disk  SAS             12 Gbps                                                DA            
      0,    23    Optimal             3,576.982 GB  Solid State Disk  SAS             12 Gbps            MZILG3T8HCLS-0G4  MS00              DA            

• Inconsistent status reported in some disk drives or channels between controllers

Example: STORAGE-ARRAY-PROFILE > DRIVE CHANNELS from the each controllers reports its own path as UP and the alternative's as DOWN

• From controller A:

      CHANNEL  CHANNEL TYPE  CTRL A LINK STATUS  CTRL B LINK STATUS  
      1        Internal      Up                  Up                  
      2        Internal      Up                  Up                  
      3        Expansion     Up                  Down                
      4        Expansion     Up                  Down                


• From controller B:

      CHANNEL  CHANNEL TYPE  CTRL A LINK STATUS  CTRL B LINK STATUS  
      1        Internal      Up                  Up                  
      2        Internal      Up                  Up                  
      3        Expansion     Down                Up                  
      4        Expansion     Down                Up                  

• Reseating or replacing related parts does not resolve the situation