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large drive support and change to Exfat

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Chris Titus
2026-03-02 21:08:34 -06:00
parent e4cb061b0e
commit 219b93989a
1 changed files with 3 additions and 19 deletions
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22
functions/private/Invoke-WinUtilISOUSB.ps1
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@@ -113,7 +113,7 @@ function Invoke-WinUtilISOWriteUSB {
# Phase 3: Create FAT32 partition via diskpart # Phase 3: Create FAT32 partition via diskpart
$volLabel = "W11-" + (Get-Date).ToString('yyMMdd') $volLabel = "W11-" + (Get-Date).ToString('yyMMdd')
$dpFile2 = Join-Path $env:TEMP "winutil_diskpart2_$(Get-Random).txt" $dpFile2 = Join-Path $env:TEMP "winutil_diskpart2_$(Get-Random).txt"
"select disk $diskNum`ncreate partition primary`nformat quick fs=fat32 label=`"$volLabel`"`nexit" | "select disk $diskNum`ncreate partition primary`nformat quick fs=exfat label=`"$volLabel`"`nexit" |
Set-Content -Path $dpFile2 -Encoding ASCII Set-Content -Path $dpFile2 -Encoding ASCII
Log "Creating partitions on Disk $diskNum..." Log "Creating partitions on Disk $diskNum..."
diskpart /s $dpFile2 2>&1 | Where-Object { $_ -match '\S' } | ForEach-Object { Log " diskpart: $_" } diskpart /s $dpFile2 2>&1 | Where-Object { $_ -match '\S' } | ForEach-Object { Log " diskpart: $_" }
@@ -146,24 +146,8 @@ function Invoke-WinUtilISOWriteUSB {
Log "USB data partition: $usbDrive" Log "USB data partition: $usbDrive"
SetProgress "Copying Windows 11 files to USB..." 45 SetProgress "Copying Windows 11 files to USB..." 45
# Copy files; split install.wim if > 4 GB (FAT32 limit) # Copy files (exFAT supports files > 4 GB, no splitting needed)
$installWim = Join-Path $contentsDir "sources\install.wim" & robocopy $contentsDir $usbDrive /E /NFL /NDL /NJH /NJS
if (Test-Path $installWim) {
$wimSizeMB = [math]::Round((Get-Item $installWim).Length / 1MB)
if ($wimSizeMB -gt 3800) {
Log "install.wim is $wimSizeMB MB - splitting for FAT32 compatibility... This will take several minutes."
$splitDest = Join-Path $usbDrive "sources\install.swm"
New-Item -ItemType Directory -Path (Split-Path $splitDest) -Force | Out-Null
Split-WindowsImage -ImagePath $installWim -SplitImagePath $splitDest -FileSize 3800 -CheckIntegrity
Log "install.wim split complete."
Log "Copying remaining files to USB..."
& robocopy $contentsDir $usbDrive /E /XF install.wim /NFL /NDL /NJH /NJS
} else {
& robocopy $contentsDir $usbDrive /E /NFL /NDL /NJH /NJS
}
} else {
& robocopy $contentsDir $usbDrive /E /NFL /NDL /NJH /NJS
}
SetProgress "Finalising USB drive..." 90 SetProgress "Finalising USB drive..." 90
Log "Files copied to USB." Log "Files copied to USB."