Vmware Windows 10 Inaccessible Boot Device May 2026

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 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.” vmware windows 10 inaccessible boot device

The payroll database blinked alive. Heartbeat restored. She navigated to a USB drive she had

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. Access to device failed

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?

Then—the login screen. Glorious, blue, unbroken.