Booting Windows 10 PRO installed on two disks in one computer, file access problems

E

ErichWR

Problem:
My PC has several HDD's than can boot. The booting disk is selected in the BIOS. After installing Windows 10 PRO the loose of access to some files or folders was observed when the booting disk was changed. This problem was not observed up to Windows 8 Pro.

For this reason I developed a procedure that enables to reproduce this effect by other people. A PC with one HDD and one SSD was used, both with the same OS "clean installed" based on "Win10_1803_EnglishInternational_x64.iso" and activated. The version is "Windows 10 PRO Version 1803 (OS Build 17134.1)" and was not connected to the internet in this test.

According to the Disk Management, the MBR partitions formatted with NTFS are:
[5] HDD= 149.05 GB, System Reserved 500 MB, [5]Main 80.08 GB, [5]Work 68.48 MB.
[0] SSD= 119.24 GB, System Reserved 500 MB, [0]Main 80.08 GB, [0]Work 38.67 MB.

Test:
a) boot with [0] as master and [5] as slave
b) copy from the USB the files Master.txt to [0]Work and Slave.txt to [5]Work **
c) shut down (use not Restart from the menu!)
d) boot with [5] as master and [0] as slave, both files exist
e) delete both files and shut down
f) boot with [0] as master and [5] as slave, both files remain accessible
g) shut down.
g) boot with [5] as master and [0] as slave, both files are not accessible,
they were deleted in step e)

Conclusion:
The access structure of the partitions and folders is stored only in the booting disk.
The reason is probably the speed up of the access. The problem is that the access information is not stored at the slave disk so when the slave is used as master, the access data is not available.

There are many other problems that appear when changes of contents or of structure affect a slave disk. This test example was selected so it can be easily reproduced and verified by other users. It is important that the test is performed with a "clean" installed OS in order to avoid information from previous
uses. The option "Shut down" and not "Restart" should be employed between the changes of the booting disk. Only under these conditions is the test reproducible, otherwise the behavior changes. The problems were observed also in other Windows 10 PRO versions.

Continue reading...
 
Back
Top Bottom