S.M.A.R.T SSD en ESXi

Prácticamente he ido sustituyendo los disco duros mecánicos por SSD, en todos los host que administro, el problema que me he encontrado es poder detectar algún posible fallo, debido a que los SSD tienen una vida util dependiendo de las celdas que se pueden sobrescribir 1000 en los SSD TLC o 100.000 en los SLC.

Por eso este hecho me parece interesante poder controlar estos datos de escritura de las celdas, desafortunadamente no hay opción de controlar estos valores desde VMware Host Client, pero podemos usara la herramienta smartmontools que nos permite poder acceder a los datos de control de S.M.A.R.T

El valor que tendremos que tener en cuenta es 'TBW (Total Bytes Written) este valor describe cuantos Bytes se pueden escribir en todo el dispositivo, hasta que espire la garantía, el valor lo podremos leer en S.M.A.R.T en el campo Total_LBAs_Written

Instalar smartctl

smartmontools

Descarga

copiar el archivo vib en /tmp/

Aceptar instalación de CommunitySupported

esxcli software acceptance set --level=CommunitySupported

Instalar

esxcli software vib install -v /tmp/smartctl-6.6-4321.x86_64.vib

/opt/smartmontools/smartctl -d [Device Type] --all /dev/disks/[DISK]

Listar discos

esxcli storage core device list

naa.50014ee25619eff0
   Display Name: Local ATA Disk (naa.50014ee25619eff0)
   Has Settable Display Name: true
   Size: 476940
   Device Type: Direct-Access
   Multipath Plugin: NMP
   Devfs Path: /vmfs/devices/disks/naa.50014ee25619eff0
   Vendor: ATA
   Model: WDC WD5000AAJS-0
   Revision: 12.0
   SCSI Level: 5
   Is Pseudo: false
   Status: on
   Is RDM Capable: false
   Is Local: true
   Is Removable: false
   Is SSD: false
   Is VVOL PE: false
   Is Offline: false
   Is Perennially Reserved: false
   Queue Full Sample Size: 0
   Queue Full Threshold: 0
   Thin Provisioning Status: unknown
   Attached Filters:
   VAAI Status: unsupported
   Other UIDs: vml.0100000000202020202057442d574341533833323637313936574443205744
   Is Shared Clusterwide: false
   Is Local SAS Device: false
   Is SAS: false
   Is USB: false
   Is Boot USB Device: false
   Is Boot Device: false
   Device Max Queue Depth: 1
   No of outstanding IOs with competing worlds: 1
   Drive Type: unknown
   RAID Level: unknown
   Number of Physical Drives: unknown
   Protection Enabled: false
   PI Activated: false
   PI Type: 0
   PI Protection Mask: NO PROTECTION
   Supported Guard Types: NO GUARD SUPPORT
   DIX Enabled: false
   DIX Guard Type: NO GUARD SUPPORT
   Emulated DIX/DIF Enabled: false

opt/smartmontools/smartctl -d sat --all /dev/disks/naa.50014ee25619eff0

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   200   200   051    Pre-fail  Always       -       42
  3 Spin_Up_Time            0x0003   182   179   021    Pre-fail  Always       -       5858
  4 Start_Stop_Count        0x0032   097   097   000    Old_age   Always       -       3343
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000e   200   200   051    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   037   037   000    Old_age   Always       -       46459
 10 Spin_Retry_Count        0x0012   100   100   051    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0012   100   100   051    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   098   098   000    Old_age   Always       -       2451
192 Power-Off_Retract_Count 0x0032   199   199   000    Old_age   Always       -       1489
193 Load_Cycle_Count        0x0032   199   199   000    Old_age   Always       -       3344
194 Temperature_Celsius     0x0022   122   093   000    Old_age   Always       -       28
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0012   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0010   200   200   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   051    Old_age   Offline      -       0

esxcli storage

esxcli storage core device smart get -d naa.50014ee25619eff0

Health Status                 OK     N/A        N/A
Media Wearout Indicator       N/A    N/A        N/A
Write Error Count             0      51         N/A
Read Error Count              42     51         N/A
Power-on Hours                37     0          37
Power Cycle Count             98     0          98
Reallocated Sector Count      0      140        N/A
Raw Read Error Rate           42     51         N/A
Drive Temperature             28     0          N/A
Driver Rated Max Temperature  N/A    N/A        N/A
Write Sectors TOT Count       N/A    N/A        N/A
Read Sectors TOT Count        N/A    N/A        N/A
Initial Bad Block Count       N/A    N/A        N/A

esxcli storage core device stats get -d naa.50014ee25619eff0

Device: naa.50014ee25619eff0
   Successful Commands: 9265
   Blocks Read: 119780
   Blocks Written: 531
   Read Operations: 1720
   Write Operations: 531
   Reserve Operations: 73
   Reservation Conflicts: 0
   Failed Commands: 1
   Failed Blocks Read: 0
   Failed Blocks Written: 0
   Failed Read Operations: 0
   Failed Write Operations: 0
   Failed Reserve Operations: 0