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Sunday, December 23, 2018

Identify NVMe Drive Attribute


[root@moon 14:27:11 john]# nvme id-ns -H /dev/nvme1n1
NVME Identify Namespace 1:
nsze    : 0xba4d9d6
ncap    : 0xba4d9d6
nuse    : 0xba4d9d6
nsfeat  : 0
  [2:2] : 0 Deallocated or Unwritten Logical Block error Not Supported
  [1:1] : 0 Namespace uses AWUN, AWUPF, and ACWU
  [0:0] : 0 Thin Provisioning Not Supported

nlbaf   : 3
flbas   : 0x3
  [4:4] : 0 Metadata Transferred in Separate Contiguous Buffer
  [3:0] : 0x3 Current LBA Format Selected

mc      : 0x3
  [1:1] : 0x1 Metadata Pointer Supported
  [0:0] : 0x1 Metadata as Part of Extended Data LBA Supported

dpc     : 0x1f
  [4:4] : 0x1 Protection Information Transferred as Last 8 Bytes of Metadata Supported
  [3:3] : 0x1 Protection Information Transferred as First 8 Bytes of Metadata Supported
  [2:2] : 0x1 Protection Information Type 3 Supported
  [1:1] : 0x1 Protection Information Type 2 Supported
  [0:0] : 0x1 Protection Information Type 1 Supported

dps     : 0
  [3:3] : 0 Protection Information is Transferred as Last 8 Bytes of Metadata
  [2:0] : 0 Protection Information Disabled

nmic    : 0x1
  [0:0] : 0x1 Namespace Multipath Capable

rescap  : 0x7f
  [6:6] : 0x1 Exclusive Access - All Registrants Supported
  [5:5] : 0x1 Write Exclusive - All Registrants Supported
  [4:4] : 0x1 Exclusive Access - Registrants Only Supported
  [3:3] : 0x1 Write Exclusive - Registrants Only Supported
  [2:2] : 0x1 Exclusive Access Supported
  [1:1] : 0x1 Write Exclusive Supported
  [0:0] : 0x1 Persist Through Power Loss Supported

fpi     : 0x80
  [7:7] : 0x1 Format Progress Indicator Supported
  [6:0] : 0 Format Progress Indicator (Remaining 0%)

dlfeat  : 0
  [4:4] : 0 Guard Field of Deallocated Logical Blocks is set to 0xFFFF
  [3:3] : 0 Deallocate Bit in the Write Zeroes Commmand is Not Supported
  [2:0] : 0 Bytes Read From a Deallocated Logical Block and its Metadata are Not Reported

nawun   : 0
nawupf  : 0
nacwu   : 0
nabsn   : 0
nabo    : 0
nabspf  : 0
noiob   : 0
nvmcap  : 800166076416
nvmsetid: 0
endgid  : 0
nguid   : 334843304bd021179843285800000004
eui64   : 023438ec7dbc1f9d
LBA Format  0 : Metadata Size: 0   bytes - Data Size: 512 bytes - Relative Performance: 0x1 Better 
LBA Format  1 : Metadata Size: 8   bytes - Data Size: 512 bytes - Relative Performance: 0x3 Degraded 
LBA Format  2 : Metadata Size: 0   bytes - Data Size: 4096 bytes - Relative Performance: 0 Best  (in use)
LBA Format  3 : Metadata Size: 8   bytes - Data Size: 4096 bytes - Relative Performance: 0x2 Good

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