Device Media State

Before submitting IO, then it is useful to obtain the state of the device media, this can by done via the nvm_cmd rprt_all and nvm_cmd rprt_lun.

nvm_cmd rprt_all /dev/nvme0n1

Which will yield device information as shown below:

# nvm_cmd_rprt: (nil)
rprt:
  ndescr: 47168
rprt_descr:
  - { slba: 0x0000000000000000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x0000000000002000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x0000000000004000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x0000000000006000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x0000000000008000, cnlb: 0x1800, wp: 0x0000000000001800, cs: 0x02, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000000000A000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }

... block address output omitted for brevity ...

  - { slba: 0x000000001FB66000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB68000, cnlb: 0x1800, wp: 0x000000000000ffff, cs: 0x08, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB6A000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB6C000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB6E000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB70000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB72000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB74000, cnlb: 0x1800, wp: 0x000000000000ffff, cs: 0x08, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB76000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB78000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB7A000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB7C000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB7E000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB80000, cnlb: 0x1800, wp: 0x000000000000ffff, cs: 0x08, ct: 0x01, wli: 0x00 }
  - { slba: 0x000000001FB82000, cnlb: 0x1800, wp: 0x0000000000000000, cs: 0x01, ct: 0x01, wli: 0x00 }

The output is abbreviated as it contains states for all chunks.

Note

The slba is on device-format use nvm_addr_dev2gen to convert it to general format.