I have an external HD that died on me a while ago and I'm trying to see if I can format / erase it to start using it again.
The disk does not show up in Finder but I can see it in Disk Utility. When I try to erase it from there I get
Disk Erase failed with the error: POSIX reports: The operation couldn’t be completed. Cannot allocate memory
When I try to verify the volume:
diskutil verifyVolume /dev/disk2 Error starting filesystem verification for disk2: Unrecognized filesystem (-9958)
I've tried running a surface scan in Techtools Pro, it processed 650 blocks and all were bad. I cancelled the operation cause it was very slow.
Diskutil info /dev/disk2 tells me:
Device Identifier: disk2 Device Node: /dev/disk2 Part Of Whole: disk2 Device / Media Name: WD Ext HDD 1021 Media Volume Name: Escaped with Unicode: Mounted: No File System: None Partition Type: None Bootable: Not bootable Media Type: Generic Protocol: USB SMART Status: Not Supported Total Size: 2.0 TB (2000396746752 Bytes) (exactly 3907024896 512-Byte-Blocks) Volume Free Space: Not Applicable Read-Only Media: No Read-Only Volume: Not applicable (no filesystem) Ejectable: Yes Whole: Yes Internal: No OS 9 Drivers: No Low Level Format: Not Supported
I've also tried:
diskutil eraseDisk JHFS+ Stef2TB /dev/disk2 Started erase on disk2 Unmounting disk Creating partition map Waiting for disks to reappear Formatting disk2s2 as Mac OS Extended (Journaled) with name Stef2TB Error: -9944: File system formatter failed
Can I salvage this drive somehow or is it ready for the trash?