I'm having a problem with the internal SSD on one of my Macs running 10.10. It was working fine when I was browsing the web one day and then suddenly froze with the spinning beachball; I couldn't force quit (it was truly hung) so I forced a restart and now the computer won't boot at all. I've tried the following with no success:
- Booting into the recovery partition and repairing the disk with Disk Utility.
- Booting on an external USB 10.10 installer and repairing the disk with Disk Utility.
- Booting in target disk mode and repairing the disk with Disk Utility.
- Booting in target disk mode and trying everything I can think of with
At this point I've given up on Disk Utility and have been looking for the right combination of
gpt to get things working. I have some data that will be lost so reformatting is not an option.
Here is some of the relevant info:
$ diskutil list:
/dev/disk1 (external): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme 251.0 GB disk1 1: EFI EFI 209.7 MB disk1s1 2: Apple_CoreStorage Macintosh HD 250.1 GB disk1s2 3: Apple_Boot Recovery HD 650.0 MB disk1s3
$ diskutil info disk1:
Device Identifier: disk1 Device Node: /dev/disk1 Whole: Yes Part of Whole: disk1 Device / Media Name: APPLE SSD SD256E 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: Thunderbolt SMART Status: Verified Total Size: 251.0 GB (251000193024 Bytes) (exactly 490234752 512-Byte-Units) Volume Free Space: Not applicable (no file system) Device Block Size: 512 Bytes Read-Only Media: Yes Read-Only Volume: Not applicable (no file system) Device Location: External Removable Media: No OS 9 Drivers: No Low Level Format: Not supported
$ 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: POSIX reports: Exec format error
$ sudo diskutil repairDisk disk1:
Unable to repair this whole disk: A writable disk is required (-69772)
$ 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 - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 488555536 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC 488965176 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC 490234712 7 490234719 32 Sec GPT table 490234751 1 Sec GPT header
$ diskutil cs list:
CoreStorage logical volume groups (1 found) | +-- Logical Volume Group xxxxxxxx-xxxx-xxxx-xxxx-22CC7A9CEE24 ========================================================= Name: Macintosh HD Status: Offline Size: 250140434432 B (250.1 GB) Free Space: 249788108800 B (249.8 GB) | +-< Physical Volume xxxxxxxx-xxxx-xxxx-xxxx-907CB441E882 ---------------------------------------------------- Index: 0 Disk: disk1s2 Status: Online Size: 250140434432 B (250.1 GB)