PowerShell: script to monitor SSD total lbas writes

ssdwrites.ps1

Set-Location $PSScriptRoot

$tJson = .\smartctl.exe -j -A /dev/sda | ConvertFrom-Json
$totallba = ($tJson.ata_smart_attributes.table | where { $_.id -eq 241 }).raw.value
$lasttlba = Get-Content -Path "last"

$inGB = ([Math]::Round($totallba * 512 / 1GB, 2)).ToString("0.00")
$diff = ([Math]::Round(($totallba - $lasttlba) * 512 / 1MB, 2)).ToString("0.00")

$curDT = (Get-Date -Format "yyyy/MM/dd HH:mm:ss")
Add-Content -Path "ssd.log" -Value "$curDT     $inGB GiB     +$diff MiB"
Set-Content -Path "last" -Value $totallba