Hi!
I've got a problem with my external HD. I used it via an Anker USB-Hub in combination with another HD when it suddenly began to periodically unmount and mount again. After a few times of (un-)mounting I detached the HD from the hub and plugged it directly in my USB port. But it didn't show up anymore, though the lights indicated that it is working. It is neither shown in Disk Utility, so I switched to Terminal.
With "diskutil list" I received the following:
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *250.1 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS ext HDD 249.2 GB disk2s2
So I typed "diskutil info /dev/disk2" and received:
Device Identifier: disk2
Device Node: /dev/disk2
Whole: Yes
Part of Whole: disk2
Device / Media Name: Inateck Media
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: USB
SMART Status: Not Supported
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: External
Removable Media: Fixed
Virtual: No
OS 9 Drivers: No
Low Level Format: Not supported
After those information I typed "diskutil unmountDisk /dev/disk2s2": Unmount of all volumes on disk2 was successful
Then tried "diskutil mount /dev/disk2s2": Volume on (null) failed to mount
If the volume is damaged, try the "readOnly" option
Trying "diskutil mountDisk /dev/disk2s2" resulted in: One or more volume(s) failed to mount.
I read of the possible solution to just wait and wish, but it didn't help either.
Do you have any suggestions or can someone explain, what the real problem is? Sorry for my english, I'm no native speaker but I hope that you were able to get my point.
Thank you in advance and best regards!
I've got a problem with my external HD. I used it via an Anker USB-Hub in combination with another HD when it suddenly began to periodically unmount and mount again. After a few times of (un-)mounting I detached the HD from the hub and plugged it directly in my USB port. But it didn't show up anymore, though the lights indicated that it is working. It is neither shown in Disk Utility, so I switched to Terminal.
With "diskutil list" I received the following:
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *250.1 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS ext HDD 249.2 GB disk2s2
So I typed "diskutil info /dev/disk2" and received:
Device Identifier: disk2
Device Node: /dev/disk2
Whole: Yes
Part of Whole: disk2
Device / Media Name: Inateck Media
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: USB
SMART Status: Not Supported
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: External
Removable Media: Fixed
Virtual: No
OS 9 Drivers: No
Low Level Format: Not supported
After those information I typed "diskutil unmountDisk /dev/disk2s2": Unmount of all volumes on disk2 was successful
Then tried "diskutil mount /dev/disk2s2": Volume on (null) failed to mount
If the volume is damaged, try the "readOnly" option
Trying "diskutil mountDisk /dev/disk2s2" resulted in: One or more volume(s) failed to mount.
I read of the possible solution to just wait and wish, but it didn't help either.
Do you have any suggestions or can someone explain, what the real problem is? Sorry for my english, I'm no native speaker but I hope that you were able to get my point.
Thank you in advance and best regards!