![]() ![]() To resolve this issue, click the following article number to view the article in the Microsoft Knowledge Base:ĩ78526 FIX: Windows Explorer may stop responding when you insert a recordable BD-R into the Blu-Ray drive on a computer that is running Windows 7 or Windows Server 2008 R2 More Information Known issues with this updateĪfter you install this update, you may experience an issue in which Windows Explorer stops responding when you insert a recordable Blu-ray disc (BD-R) into the Blu-ray drive on the computer. However, in Windows 7, it takes several hours to write the same file to a DVD+/-R. For example, on a computer that is running Windows Vista, it takes about 20 seconds to write a 100 megabyte (MB) file to a DVD+/-R. When you try to write files to the DVD+/-R, the writing speed is very slow. You format a DVD+/-R in the "Like a USB flash drive" format. Note The "Like a USB flash drive" format is a kind of UDF format. Which OS is it?įor more details, have a look at: Using EFI/UEFI firmware in a VMware Virtual MachineError 0x8007045D: The request could not be performed because of an I/O device error. ![]() It might be that the disc is not intended to be EFI-bootable, or it might be that the disc is incorrectly produced and thus won't be EFI-bootable. So: Your screenshot tells us that you have a readable disc in the drive, and it's bootable using BIOS, but is not bootable using EFI. For discs which are BIOS-bootable and EFI-bootable, there will be two separate "/CDROM(.)" entries in the device map. For a BIOS bootable image, the third of those numbers (the 0xCCCC) will be low (0x1F or less), but it will generally be much higher (0x2D0 would be a likely minimum) for EFI bootable images. The device map you gave in your screenshot indicates that the disc you are attempting to boot does not include EFI support.ĭetails: The existence of an entry ending with "/CDROM(0xAAAA,0xBBBB,0xCCCC)" tells us that there's a CD in the virtual CD/DVD drive and that the disc is in some form bootable. iso image available for download from Microsoft's site, without using mediacreationtool.exe? There's a much better chance of success with a directly-downloaded. This needs to be reported to Microsoft as a defect in their Media Creation Tool. It will not be bootable in a VMware virtual machine. The disc you have there will depend on the presence of a UDF driver in the system's firmware, so it will be bootable on some systems, but not all. ![]() Your most recent screenshot shows that the EFI boot files are present on the disc's main UDF filesystem, but your first screenshot shows that the EFI boot files are not present in an El Torito boot partition, as is required by the EFI specification. Any OSes which depend on the presence of an ISO9660 or UDF driver will be severely restricting the platforms on which they can run, and such OSes will not run in a VMware virtual machine. The UEFI specification does not require the ability to read an ISO9660 or UDF filesystem, although some hardware and virtual platform vendors include drivers for those filesystems anyway. The most common case of this we've seen has been OS vendors placing the EFI bootloader for the installation medium onto an ISO9660 or UDF filesystem instead of an El Torito partition. Sometimes, OS vendors end up unintentionally depending on characteristics of their development and test systems that are not part of the UEFI specification, thus limiting the compatibility of their OS. The UEFI specification allows quite a bit of latitude for vendors to extend the firmware, as well as to implement (or omit) certain optional parts of the UEFI specification. Quoting an excerpt from Using EFI/UEFI firmware in a VMware Virtual Machine: It looks like Media Creation Tool is making the same mistake we've seen from several other OS vendors. ![]()
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