Jump to content

The disk you inserted was not readable by this computer (High Sierra only)


Electronshaper
 Share

6 posts in this topic

Recommended Posts

 

Mobo: GA-X58A-UD3R

CPU: XEON X5650

 

Successfully upgraded from Sierra to High Sierra.

 

I have 3 drives on this box. A small SDD for the main system, another drive for all my data and a third drive with a bootable backup of my previous Sierra in case things get messy with High Sierra. 

 

That backup disk has its own bootable EFI partition with Clover. 

 

The issue: After upgrading to High Sierra the backup Sierra disk doesn't initialize. I get the message "The disk you inserted was not readable by this computer", and hitting initialize doesn't seem to do anything.

 

The drive shows up on clover at boot, and the Sierra backup boots just fine. I'm wondering if High Sierra has any additional protections that are preventing the partitions to mount (like detected previous system files or maybe the other drive EFI boot partition). Diskutil can see the HD as disk2, but doesn't show any of the partitions. I never had this issue previously on Sierra, Yosemite or any other previous OSX.

 

The other disk with just data (no EFI or system files) is showing up fine instantly, so I really don't believe it is a driver issue.

 

Any clue of what might be causing this, and more importantly, how to solve it?

 

Thanks, folks!

 

 

DYmwthL.png

 

 

YFedd6m.png

 

 

fJrHJOa.png

Link to comment
Share on other sites

Interesting, have the (nearly) same issue but no solution so far. The SSD for the base system works fine, an HDD where I have a data partition and a bootable partition with an older macOS (el capitan) just appears as unrecognized in High Sierra:

diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *240.1 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS ssdmac                  239.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *1.0 TB     disk1
   1:               Windows_NTFS System-reserviert       524.3 MB   disk1s1
   2:               Windows_NTFS                         999.7 GB   disk1s2

/dev/disk2 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                                                   *1.0 TB     disk2

In Sierra everything was fine (although disk2 was mentioned as external, didn't care :) )

 

I can boot disk2 from clover just fine. But when booting HighSierra from my SSD the disk2 is not recognized, strange....

Link to comment
Share on other sites

 Share

×
×
  • Create New...