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This article describes how to detect the second hard disk on new devices.
This problem is typically seen on new devices where the second hard disk is present in the unit but not visible under ‘get system storage’ command, as illustrated bellow:

# get system storage

== [ HDD1 ]
name: HDD1 media-type: scsi partition: 736C3C37657A080B

Verify if the second hard disk is actually present in the unit:

# diagnose hardware deviceinfo disk

Device S* 14.9 GB ref: n/a ATA SanDisk SSD i110 (SSD) [BOOT]
partition 1 256.0 MB ref: n/a label:
[ dev: /dev/sda1 major: 8 minor: 1 free: 203MB mounted: N ]
partition 2 256.0 MB ref: n/a label:
[ dev: /dev/sda2 major: 8 minor: 2 free: 213MB mounted: Y ]
partition 3 14.4 GB ref: n/a label:
[ dev: /dev/sda3 major: 8 minor: 3 free: 14479MB mounted: Y ]

Device S1 447.1 GB ref: 16 ATA ADATA SX1000L (SSD) [HDD1]
partition 1 447.1 GB ref: 17 label: 7AF0EAE204D4AAF3
[ dev: /dev/sdb1 major: 8 minor: 17 free: 450473MB mounted: Y ]

Device S2 447.1 GB ref: 32 ATA ADATA SX1000L (SSD) [HDD2]

Total available disks: 2
Max SSD disks: 3 Host floor: 0

From the above output, the second hard disk is present. To be able to view it under ‘get system storage’ and use it, format the disk using the command below:

# execute disk format <device_ref_no>                                           <-------------------- in the above case the reference is 32