Caution - Yosemite may screw up partitions.

[araposo]

What kind of Mavericks backup do you have (maybe Time machine?) that we could use to just nuke the whole drive and get you back to Mavs?

I have a time machine backup on an external...but when I boot into the osx utilities and select the option to use the back up from yesterday I get stuck on the "searching for destinations"...and it never finds my internal hard drive....again I'm thinking something permissions related that the Beta installer did to the internal hard drive.

Any ideas?

 

[Weaselboy]

I have a time machine backup on an external...but when I boot into the osx utilities and select the option to use the back up from yesterday I get stuck on the "searching for destinations"...and it never finds my internal hard drive....again I'm thinking something permissions related that the Beta installer did to the internal hard drive.

Any ideas?

Ah good... try this. Option key boot to the TM disk then when the recovery screen comes up launch Disk Util then go to the erase tab. Now select the drive brand name at the very top of the left column then erase the entire disk to Mac OS Extended (Journaled). The quit Disk Util and click restore. You should get a screen asking what date you want to restore from. Just scroll back in time in that screen to get to a Mavs restore and restore from there.

This will wipe everything on the internal and replace it with your Mavs backup.

 

[araposo]

Ah good... try this. Option key boot to the TM disk then when the recovery screen comes up launch Disk Util then go to the erase tab. Now select the drive brand name at the very top of the left column then erase the entire disk to Mac OS Extended (Journaled). The quit Disk Util and click restore. You should get a screen asking what date you want to restore from. Just scroll back in time in that screen to get to a Mavs restore and restore from there.

This will wipe everything on the internal and replace it with your Mavs backup.

Is there anyway to check that my backup has all my files before I erase my hard drive? (I have no other mac's in the house)

 

[grahamperrin]

… both issues occurred a "point" in time that coincided with the loading of Yosemite (X2), and promptly resolved after deletion.

I assume that the uses of Yosemite involved an area of the disk(s) that is not normally used by Mavericks.

Concerning apparent resolution … back to post 66 in this topic.

I read the article in the link provided, then downloaded "Smart Utility" as recommended in the content of the article and all main HD's PASSED and no errors or bad sectors. …

To clarify: it wasn't a recommendation to use SMART Utility. SMART Utility was handy after I used a preferred utility for that case: HDAT2.

Did you run the S.M.A.R.T. extended self-test?

It's extended (compared to the short self-test), but not sufficiently thorough to detect some types of failure.

 

[Weaselboy]

Is there anyway to check that my backup has all my files before I erase my hard drive? (I have no other mac's in the house)

Not without restoring to another machine or even an external drive on your machine.

 

[TheManOfSilver]

Problem fixed itself?

For what it's worth, I'll post my own experience with this issue in case it helps some of the people here with non-revertible logical groups.

I had the same issues as others have reported on my MBA after installing Yosemite on a 40GB partition. I was left with a Yosemite HD logical group, with my usual startup drive, Macintosh HD and Yosemite HD as partitions below that. I could not delete the Yosemite HD partition. I repaired permissions in Disk Utility in case this contributed, but I don't think that really did anything.

I also had difficulty initially rebooting into my Mavericks startup disk, but was able through Disk Utility in recovery mode as others have reported.

I ran the terminal command to list drives as suggested here, and saw that the logical group was NOT revertible. I thought this may have had something to do with the Yosemite HD partition having FileVault turned on. So, I rebooted into Yosemite (oddly, this time my Macintosh HD showed up as an option, perhaps because I had forced that option in the initial reboot?). When I went to turn off FileVault, I couldn't as it was in the middle of encrypting. Once it finished, I turned off decryption and rebooted.

Now, when I started in boot mode, I was presented with 4 options: Macintosh HD, Recovery 10.9, Yosemite HD and Recovery 10.10. When I rebooted into my Mavericks partition and ran Disk Utility, I was back to what I wanted in the first place (screenshot attached).

So, for those of you who are having challenges with a non-revertible logical volume, this MAY be your fix too. I can't see what else fixed things as I did not run any of the other terminal commands suggested here. Perhaps it was simply the act of rebooting into both partitions again???

More savvy people will have to weigh in to explain this, but I wanted to share my very non-techie experience in case it helps others with their issues.

 

[Weaselboy]

I thought this may have had something to do with the Yosemite HD partition having FileVault turned on.

I think this is what is different about your scenario from the others here. When you turn on FV2, it converts the volume to a an encrypted core storage volume. Others here had there Yosemite volume converted to a regular (unencrypted) core storage volume after the Yosemite install on a second partition. It sounds like by you turning off FV2 it had the same effect as running the convert core storage command mentioned by others in the thread.

 

[TheManOfSilver]

I think this is what is different about your scenario from the others here. When you turn on FV2, it converts the volume to a an encrypted core storage volume. Others here had there Yosemite volume converted to a regular (unencrypted) core storage volume after the Yosemite install on a second partition. It sounds like by you turning off FV2 it had the same effect as running the convert core storage command mentioned by others in the thread.

Sounds reasonable. I thought my scenario sounded like the one being posted by Caulin, so thought I'd post my experience to see if helps others in the same boat as us.

Appreciate the input though.

 

[Weaselboy]

Sounds reasonable. I thought my scenario sounded like the one being posted by Caulin, so thought I'd post my experience to see if helps others in the same boat as us.

Appreciate the input though.

Being a Filevault user myself, I appreciate your post.

 

[bknida]

So- I, like everyone else cannot boot back into Mavericks after having installed Yosemite under a 50 gig partition. The only options I get are "installer" "yosemite" and "recovery 10.9" I have done the disk repairs and whatnot and nothing works. Any suggestions?

 

[lehman310]

So- I, like everyone else cannot boot back into Mavericks after having installed Yosemite under a 50 gig partition. The only options I get are "installer" "yosemite" and "recovery 10.9" I have done the disk repairs and whatnot and nothing works. Any suggestions?

Go to system preferences on Yosemite and select startup disk. Should show your Mavericks partition. I had same issue you have.

 

[bknida]

Go to system preferences on Yosemite and select startup disk. Should show your Mavericks partition. I had same issue you have.

this is all I get

 

[Apple_Robert]

this is all I get

What happens when you use the option key when booting?

 

[bknida]

What happens when you use the option key when booting?

Ya know what. I'm an idiot. I was running disk utility on that partition when I searched for it under "start up disk" once it finished mavericks popped up. Thank you guys for your help

 

[smartalic34]

You CAN NOT do this.

The answer is simple;

1) Open Disk Utility and ERASE the Yosemite partition. This should convert the drive back to a normal layout, not a CoreStorage volume

2) Using terminal delete the recovery partition

3) Merge the recovery partition with the Yosemite partition

4) Merge the merged volumes with your Mavericks volume.

Booting into Recovery Mode will NOT allow you to delete the Yosemite volume. See my previous post:

https://forums.macrumors.com/posts/19395336/

Yes you can. I did and so did the person I got the info from. Booting into recovery allows the Yosemite volume to be deleted, as long as it's erased first. Did it not work for you? Did you have FileVault turned on? I did not.

 

[sukanas]

For some reason, after restarting, I can't login becuase its asking for a password to unlock the disk. I never remember typing in or setting up a password... I also can't make any changes booting via commandR

----------

omg, it was my iCloud password...

 

[grahamperrin]

… omg, it was my iCloud password...

That makes sense.

Recall the initial setup routine, which follows installation.

 

[Michaelgtrusa]

This is way you should install to an external drive.

 

[TheMacGeek]

I made a partion for Yosemite and called it Test Yosemite. I installed Yosemite to that partition. Now When I startup my mac it only shows Yosemite portion as well as restore and install OS partition. IT doesn't show my Mavericks Partition. I went to finder and all my files are still there but I'm not sure what to do. I need to work in Mavericks environment cause all my work files are there..

 

[Apple_Robert]

I made a partion for Yosemite and called it Test Yosemite. I installed Yosemite to that partition. Now When I startup my mac it only shows Yosemite portion as well as restore and install OS partition. IT doesn't show my Mavericks Partition. I went to finder and all my files are still there but I'm not sure what to do. I need to work in Mavericks environment cause all my work files are there..

Boot into Yosemite. Go to preferences > startup disk > pick Mavericks > reboot with option key. You should be able to see all your other partitions during option key boot from now on.

 

[araposo]

Hey Guys,

Just wanted to let you know what ended up working for me.

I booted into TM external drive I have and ran all the disk utilities there....unlike yosemite's disk utilities these ran fine and fixed all permission issues.

After that, I rebooted and the installer finally ran fine and installed Yosemite....

Looks and runs great!

 

[pacmania1982]

Yes you can. I did and so did the person I got the info from. Booting into recovery allows the Yosemite volume to be deleted, as long as it's erased first. Did it not work for you? Did you have FileVault turned on? I did not.

I agree that you need to erase the Yosemite volume first, but you can't merge the partitions back using GUI Disk Utility. The buttons to modify the drive are greyed out.

This is why you must do it via Terminal. I've tested this three times now and can confirm the same result each time.

 

[dhoerl]

Apple thinks the way it works is just great

I entered a bugreport on this a while ago, it was just closed - Apple said this is the way its suppose to work. That is, you ask to have it installed on a partition of a volume, and Apple then changes the type of volume! Unbelievable, and so Microsoftish (well, old MS ways).

I'm stunned!

Anyway, this is what they say to do, to revert: "diskutil cs revert /"

What a crock!

 

[KoolAid-Drink]

I entered a bugreport on this a while ago, it was just closed - Apple said this is the way its suppose to work. That is, you ask to have it installed on a partition of a volume, and Apple then changes the type of volume! Unbelievable, and so Microsoftish (well, old MS ways).

I'm stunned!

Anyway, this is what they say to do, to revert: "diskutil cs revert /"

What a crock!

That doesn't make sense. Why would Apple change the way Yosemite installs, especially if all previous versions of OS X didn't install in that fashion? How does it benefit the user and Apple to convert the disk partition layout with this type of installation?

Doing a revert works, and it doesn't seem to affect Yosemite at all, so theoretically, it's not a big deal, but I do wonder why Apple changed the way they deal with disk partition layouts in Yosemite.

 

[RickRoss54]

Screwed up Bootcamp

I noticed, to my dismay, that I can no longer get into my Windows 8 partition using the option key. Tried researching the internet for a fix, but, so far no luck. Used Disk Utility on Mavericks and Bootcamp shows "Owners Enabled: No" and from what I have read, that seems to be the problem. Worked fine before installing Yosemite. I would hate to have to delete Yosemite before I fully test it.