Dear respected experts,
I have a MBP Retina 2015 (Yosemite). I tried to partition my Macintosh HD ( internal 1TB SSD) disk (by splitting into half). It seemed to have split but has given me some errors about mapping or mounting...So I restarted the computer. After which, I was unable to bootup again - facing the 'stop'/'block' sign every time.
I got into Recovery Mode (cmd + R while restarting) and tried using the repair disk option. After clicking repair it keeps telling me the disk needs to be repaired. I click repair again but the same message prompting to repair again pops up. By the way, it's showing my disk as a Virtual Whole disk (500.2GB partition + 499.8GB partition). NB. I managed to erase one of the partitions (I think the 499GB one) within the Virtual Whole Disk. However, the other one cannot be erased (the option is greyed-out)
I would like to repair my disk as opposed to starting over with a brand new install. I have a pre-partition Time Machine backup on a USB drive. I tried to restore it via the recovery mode. However, it was unable to find a destination (disk) to restore it to. I am assuming the destination disk needs to be 1TB since that was the disk's size (single paritioned), although I had only used ~70GB capacity; ie the backup size on my USB drive is also 70GB.
I tried Internet Recovery Mode, as I read that I can't repair my disk via the normal recovery mode...but still to no avail. Should I perhaps bootup a Mac OS via an external USB and and try disk the utlility from there? If yes, how can I download a bootable yosemite OS onto a USB drive? (I only have one mac machine, which at the moment is not booting - have never accessed mac app store before - it's a new machine).
I am unable to boot into Single User mode (it ends up showing the stop sign plus a message about being unable to find root). I tried resetting PRAM and SCM but it didn't solve the issue.
I am worried that if I restore it would mean upgrading to El Capitan or Sierra, which (my guesses are), would render my Time Machine backup useless.
Is there any way I can repair the disk or flawlessly restore the time machine backup, which I have on a USB drive?
I accessed the terminal via recovery mode;
diskutil cs list shows the following:
CoreStorage logical volume groups (1 found)
Logical Volume Group (random digits)
size: 0 B (0 B)
free space: -none
Physical Volume (different random digits) Disk: disk1s2 Status: Failed Size: -none-
diskutil list shows: 14 different /dev/disks (ie. last one is /dev/disk14).
/dev/disk0 disk 0 is 1.3GB (Apple parition scheme) disk0s1 is apple partition map (30.7KB) disk0s2 Apple_HFS OS X Base System 1.3GB. /dev/disk1 disk1 GUID partition scheme 1TB disk1s1 EFI EFI 209.7MB disk1s2 Apple Core Storage 500.2GB disk1s3 Apple_Boot Recover HD 650MB
I've triped checked that disks 2 to 14 are single partitions and are sized from 6.3MB to 524.3KB.
gpt -r show disk0 start size index contents 0 2600084 gpt -r show 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 - (random nos C1***3B) 409640 976970432 2 GPT part - (random nos 53***AC) 977380072 1269536 3 GPT part - (similar abv 42***AC) 978649608 975560479 1954210087 32 Sec GPT table 1954210119 1 Sec GPT table