win 8.1 OS disks not recognized in new win 8.1 system but Ok in win 7
win 8.1 system disks ( upgraded from 8.0 ) recognized in older win 7 system Ok but does not exist in new win 8.1 system. Bios set to uefi. Bios recognizes drives but win 8.1 does not ( disk manager, raid configuration or file manager )
August 24th, 2015 12:42am

Hummm..... is it possible that the disk is encrypted with BitLocker?
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August 24th, 2015 1:26pm

Hello,

Whats the brand and version of the disk? Please check the compatibility from the vendors site. If need, you may need to update the firmware of the disk.

Thanks,

August 25th, 2015 7:53am

No

The disks can be seen fine in Windows 7

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August 25th, 2015 9:35am

The disks can be seen fine in Windows 7

August 25th, 2015 9:36am

Intriguing... tell us more

What is the boot device?  Are these drives always secondary to an existing boot disk?

How are the drive connected (SATA, USB, SCSI, etc)

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August 25th, 2015 10:35am

these drives were a existing 8.1 boot system

they were moved to an existing 8.1 system or a win 7 system

All partitions can be seen Ok in the win 7 system but not in the win 8.1 system

connected via sata

all the drives are seen in the bios

it does not make a difference if uefi is enabled ir not

August 25th, 2015 11:11am

the disks can bee seen in win 7 ok

these drives were a existing 8.1 boot system

the disks were a win 8.1 system & were moved to secondary drives to migrate data

no firmware update available or required to see the disk in a win 7 system ok

You cannot vote on your own postAll partitions can be seen Ok in the win 7 system but not in the win 8.1 system

connected via sata

all the drives are seen in the bios

it does not make a difference if uefi is enabled ir not

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August 25th, 2015 11:17am

So, the Win8.1 system boots up fine... but doesn't see the secondary disk as active volumes.

I would expect that the "Disk Management" tool would see all disk devices, even if they didn't have active volumes.  It should appear at the bottom part... not necessarily at the top part (where the active volumes are).  Can you re-verify that Disk Management can't see the physical drives?

If that does work, then try the DiskExt command line tool from SysInternals

https://technet.microsoft.com/en-us/sysinternals/bb896648

August 25th, 2015 2:50pm

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