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.
She had two choices. Rebuild from backup (three hours of restore time, plus a crying VP of Finance on Monday morning) or fix the driver offline. vmware windows 10 inaccessible boot device
The VMware splash screen appeared. The swirling dots. Five seconds. Ten seconds. She killed the loop and powered off the VM
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%. No new disks
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.”
The payroll database blinked alive. Heartbeat restored.