Vmware Windows 10 Inaccessible Boot Device <2025-2026>
She opened the VM settings. SCSI Controller 0: LSI Logic SAS. That was normal. But then she remembered: the latest Windows 10 cumulative update sometimes overwrites the VMware Tools driver for the Paravirtual SCSI (PVSCSI) controller. Her VM wasn’t even on PVSCSI—it was on LSI Logic SAS. So why the crash?
She killed the loop and powered off the VM. Her mind raced through the possible causes. She hadn’t changed any boot order settings. No new disks. Just a standard Windows Update. But this error— inaccessible boot device —meant one thing in VMware: the virtual hard disk controller had changed, or the driver for it had vanished into the digital abyss.
The VMware splash screen appeared. The swirling dots. Five seconds. Ten seconds.
Sarah attached the Windows 10 ISO to the VM’s virtual CD-ROM. She booted into the recovery environment— Repair your computer > Troubleshoot > Command Prompt . Then she ran the cavalry: vmware windows 10 inaccessible boot device
Sarah leaned forward, her coffee forgotten. “Come on, come on…” she whispered, tapping the spacebar. Nothing.
diskpart list volume exit dism /image:D:\ /get-drivers /format:table No VMware storage driver listed. Of course.
She navigated to a USB drive she had pre-loaded (she wasn’t a rookie) with the VMware Tools floppy image—specifically the vmwscsi.inf driver for the LSI Logic SAS controller. Then, the magic incantation: She opened the VM settings
“The virtual disk is fine,” she said, checking the datastore. “So the guest can’t see the boot disk.”
She pulled the VM’s logs from /var/log/vmkernel.log on the ESXi host. Buried in the red text: “Device ‘scsi0:0’ is not ready. Access to device failed.”
“Oh no,” she muttered. “Not the payroll box.” But then she remembered: the latest Windows 10
Outside, the night was quiet. But inside the datacenter, one little VM was booting happily again—unaware it had almost died for a driver’s vanishing act. Always keep a recovery ISO and driver floppy image nearby. In the world of VMware and Windows 10, the boot device is never truly inaccessible—it’s just waiting for the right driver to show it the way home.
She chose the latter.
Sarah, a senior systems administrator, is three hours into a quiet Sunday night shift. She’s patching a legacy Windows 10 VM—a critical virtual machine that runs the payroll database for a 500-person firm. The host is VMware ESXi 7.0. She clicks “Reboot Guest.” Thirty seconds later, her screen turns a familiar, dreaded shade of blue. The progress bar on the VMware console froze at 47%.
