How do I completely remove Yosemite inc Recovery partition

[jakeyboyne]

I installed the YM GM - but it sill feels very beta and I'm experiencing the UI sluggishness so think I'm just going to wait until the public release, so last night I booted into internet recovery, manually deleted the Logical volumes and YM partition and then rebooted again into internet recovery.

The recovery install still wants to install YM. I then tried various commands like diskutil unmount / disk util erase etc but don't think it would play nicely as I assume I was using that partition as part of internet recovery.

Any ideas how I can complete clean the machine and go to a absolutely zero'd HD so internet recovery will pull down Mavericks?

Just done a disk util list and this is what I see. Any help would be very much appreciated.

Steves-MacBook-Pro:~ steveelliott$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 8EA145ED-075F-4CF3-8D37-7FC03DC6C6DE
=========================================================
Name: Macintosh HD
Status: Online
Size: 999695822848 B (999.7 GB)
Free Space: 18984960 B (19.0 MB)
|
+-< Physical Volume 24191CC7-D503-4D55-84EB-B77ED492E8EE
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 999695822848 B (999.7 GB)
|
+-> Logical Volume Family 1CE222BD-24B8-45C4-B63E-D51060E73623
----------------------------------------------------------
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 25A28FCA-6279-4406-B518-B6339F6E9E72
---------------------------------------------------
Disk: disk1
Status: Online
Size (Total): 999324516352 B (999.3 GB)
Conversion Progress: -none-
Revertible: Yes (no decryption required)
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
Steves-MacBook-Pro:~ steveelliott$


Steves-MacBook-Pro:~ steveelliott$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_CoreStorage 999.7 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD *999.3 GB disk1
Logical Volume on disk0s2
25A28FCA-6279-4406-B518-B6339F6E9E72
Unencrypted
Steves-MacBook-Pro:~ steveelliott$

 

[tywebb13]

In terminal, type this to revert the logical volume:

diskutil corestorage revert 25A28FCA-6279-4406-B518-B6339F6E9E72

Usually I would say to then restart the computer and then you can edit your partitions in the normal fashion.

However, you say that you deleted something already. This might make things a bit harder.

Can you boot up to something other than the yosemite recovery partition?

If you are trying to downgrade to mavericks, a bootable usb installer would have been handy to wipe your whole drive and start again.

But how are you going to make one if you have no system whatsoever?

Anyway, if you have no system, after reverting the logical volume, you could try internet recovery by booting up with the option, command and r keys. Then erase the drive from that and reinstall the system that first came with your computer, but that is going to take a lot longer than if you already had a bootable usb of mavericks.