Description

    In JNP10K-RE0, SSD numbering to logical SSD naming can be counter intuitive. When JNP10K-RE0 operates normally (no SSD failure or anything), SSD Disk1 maps to /dev/sdb, and Disk2 maps to /dev/sda.

    In the below output from JNP10K-RE0, Disk1 is for /dev/sdb that is used as a back up storage media, whereas Disk2 is for /dev/sda that is a primary storage media where SW runs off of:

router> show vmhost hardware
Compute cluster: rainier-re-cc
 
  Compute node: rainier-re-cn                  
   Hardware inventory:
   
   
    Item       Capacity             Part number               Serial number             Description
    DIMM 0     8192 MB              VMT41GE7DFR8A-PBA.        80169900                  DDR3 1600 MHz
    DIMM 1     8192 MB              VMT41GE7DFR8A-PBA.        79169900                  DDR3 1600 MHz
    DIMM 2     8192 MB              VMT41GE7DFR8A-PBA.        78169900                  DDR3 1600 MHz
    DIMM 3     8192 MB              VMT41GE7DFR8A-PBA.        77169900                  DDR3 1600 MHz
    Disk1      50.0  GB             SFSA050GM3AA2TO           000060176055B1000000      SLIM SATA SSD
    Disk2      50.0  GB             SFSA050GQ1AA2TO           000060184893A3000051      SLIM SATA SSD

Symptoms

    In JNP10K-RE0, SSD numbering to logical SSD naming can be counter intuitive. When JNP10K-RE0 operates normally (no SSD failure or anything), SSD Disk1 maps to /dev/sdb, and Disk2 maps to /dev/sda.

Solution

    Describing a typical behavior of a product when operating normally.

Modification History

04/22/2025: Initial draft