Ceph: SSD device detected as rotational (HDD)

Issue

• Solid State Disk device detected as rotational (HDD).
• Solid State Disk device seen as HDD device.
• Solid State Disk seen (detected) as HDD.
• When an OSD is replaced, the new disk is seen (detected) as an SSD. All disks were previously seen as HDD.

• After disk replacement, data will not rebalance as there are not enough disks in the HDD class

  # ceph osd metadata 0
  {
  [...]
      "bluefs_db_rotational": "1",
      "bluefs_db_size": "32212254720",
      "bluefs_db_type": "hdd",
  [...]
  }
  

  Host-b:

  # smartctl -a /dev/sdb
  
  
  === START OF INFORMATION SECTION ===
  Vendor:               VMware
  Product:              Virtual disk
  Revision:             2.0
  Compliance:           SPC-4
  User Capacity:        214,748,364,800 bytes [214 GB]
  Logical block size:   512 bytes
  LU is fully provisioned
  Rotation Rate:        15000 rpm               <--- not really a spinning disk
  Device type:          disk
  

  Host-c:

  # smartctl -a /dev/sdb
  
  
  === START OF INFORMATION SECTION ===
  Vendor:               VMware
  Product:              Virtual disk
  Revision:             2.0
  Compliance:           SPC-4
  User Capacity:        214,748,364,800 bytes [214 GB]
  Logical block size:   512 bytes
  LU is thin provisioned, LBPRZ=1
  Rotation Rate:        Solid State Device      <--- SSD, this disk was just replaced
  Device type:          disk