Disk Utility Reporting EFI partition as a problem

[SignedAdam]

Disk Utility is reporting the EFI partition as a problem of the disks map

Last login: Thu Oct 20 16:06:46 on console
Users-iMac:~ user$ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:         Microsoft Reserved                         134.2 MB   disk0s1
   2:       Microsoft Basic Data Program Files (x86)     1.0 TB     disk0s2

/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *250.1 GB   disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:                  Apple_HFS macOS                   249.2 GB   disk1s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3

/dev/disk2 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                                                   *32.0 GB    disk2

/dev/disk3 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *240.1 GB   disk3
   1:           Windows Recovery                         471.9 MB   disk3s1
   2:                        EFI NO NAME                 103.8 MB   disk3s2
   3:         Microsoft Reserved                         16.8 MB    disk3s3
   4:       Microsoft Basic Data Windows                 239.5 GB   disk3s4

/dev/disk4 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk4
   1:                        EFI NO NAME                 510.7 MB   disk4s1
   2:           Linux Filesystem                         10.2 GB    disk4s2
   3:           Linux Filesystem                         10.2 GB    disk4s3
   4:                 Linux Swap                         10.2 GB    disk4s4
   5:           Linux Filesystem                         718.9 GB   disk4s5

Users-iMac:~ user$ diskutil info disk1
   Device Identifier:        disk1
   Device Node:              /dev/disk1
   Whole:                    Yes
   Part of Whole:            disk1
   Device / Media Name:      Samsung SSD 840 Series

   Volume Name:              Not applicable (no file system)
   Mounted:                  Not applicable (no file system)
   File System:              None

   Content (IOContent):      GUID_partition_scheme
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 SATA
   SMART Status:             Verified

   Disk Size:                250.1 GB (250059350016 Bytes) (exactly 488397168 512-Byte-Units)
   Device Block Size:        512 Bytes

   Read-Only Media:          No
   Read-Only Volume:         Not applicable (no file system)

   Device Location:          Internal
   Removable Media:          Fixed

   Solid State:              Yes
   Virtual:                  No
   OS 9 Drivers:             No
   Low Level Format:         Not supported

Users-iMac:~ user$ diskutil verifyDisk disk1
Started partition map verification on disk1
Checking prerequisites
Checking the partition list
Checking the partition map size
Checking for an EFI system partition
Checking the EFI system partition's size
Checking the EFI system partition's file system
Problems were found with the partition map which might prevent booting
Error: -69766: The partition map needs to be repaired because there's a problem with the EFI system partition's file system
Underlying error: 8: Exec format error
Users-iMac:~ user$ sudo diskutil repairDisk disk1
Password:
Repairing the partition map might erase disk1s1, proceed? (y/N) y
Started partition map repair on disk1
Checking prerequisites
Checking the partition list
Adjusting partition map to fit whole disk as required
Checking for an EFI system partition
Checking the EFI system partition's size
Checking the EFI system partition's file system
Repairing the EFI system partition's file system
Repairing file system
** /dev/rdisk1s1
** Phase 1 - Preparing FAT
** Phase 2 - Checking Directories
`..' entry in /EFI has non-zero start cluster
Correct? yes
** Phase 3 - Checking for Orphan Clusters
Free space in FSInfo block (308129) not correct (308131)
Fix? yes
1392 files, 154065 KiB free (308131 clusters)

***** FILE SYSTEM WAS MODIFIED *****
File system check exit code is 0
Updating boot support partitions for the volume as required
Checking the EFI system partition's folder content
Problems were encountered during repair of the partition map
Error: -69842: Couldn't mount disk
Users-iMac:~ user$ sudo gpt -r show /dev/disk1
      start       size  index  contents
          0          1         PMBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6      
         40     409600      1  GPT part - XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
     409640  486717952      2  GPT part - XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
  487127592    1269536      3  GPT part - XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
  488397128          7      
  488397135         32         Sec GPT table
  488397167          1         Sec GPT header
Users-iMac:~ user$ diskutil cs list
No CoreStorage logical volume groups found
Users-iMac:~ user$

 

[kaithefinn]

Thanks a lot, SignedAdam, it was exactly was I was looking for - it made my day !

 

[Prathik06]

Thanks a lot, SignedAdam, it helped me with the partition problem. You literally saved me.