Why two I appear to have two drives following the Catalina update?
I erased the disc and installed fresh yet this is what appears in disk utility.
Anyone?
Thanks
iMac 27" 5K, macOS 10.15
That's normal. The Mac HD - Data volume is where your files and apps are kept and you have access to them just like the older system volumes.
The Macintosh HD volume is where the system and system support files are kept and the user has no access to them. It's part of the new security that Catalina brings to the table.
What version of Catalina are you running? I have Version 10.15 (19A602) and only the -Data volume is shown in the Finder or in the Storage section of About this Mac but both are shown in Disk Utility.
Yep, they both seem to have differing amounts of data. If possible, I'd take it to Apple store or Apple certified repair shop. Looks like there is a glitch in Catalina.
Here is a new Apple article with instructions on erasing a disk:
Please provide screenshots as we cannot see your computer screen. When you reinstalled, did you first erase the disk?
Please start a new post.
No idea what you did without details. Put them in the new post.
Go to the top of the page to the Post menu and add a new discussion.
So this is actually a new "view" based on my upgrade to Catalina 10.15?
As for them being different, if I click on them in finder, they both hold EXACTLY the same files and folders.
Explain that please?
I also asked this question because it appears that my amount of available storage has diminished substantially. Is there an explanation for that?
The number of issues occurring as a result of this upgrade are alarming and extremely annoying. And, I haven';t even mentioned my iPhone sync issues yet.
Very frustrated.
Old Toad,
Thanks for the reply, they both show up in finder, I have attached images, and they have the exact same folders. I am running Catalina 10.15 - I erased the disk and installed the OS fresh and now time machine is reporting it can't back up the system because the Macintosh -HD volume is already present and needs to be renamed even though I formatted the backup disk.
I am very confused by this whole thing, it seems there is an issue with the installation and/or restoration of data from time machine.
A day wasted restoring my system?
Thanks for any advice,
Gordon
What's even stranger is that Time Machine will not back-up on my new MBP 16" if both drives are mounted. I have to unmount the data drive. That seems like it would miss important data to back-up? I don't know, since Catalina everything seems to just have gotten more complicated with Macs. What happens to "it just works" mantra that we used to live by. I feel like this is becoming more like an old Windoze machine which was a big reason for changing to Macs several years ago. What gives?
I agree, Barry.
I used every Microsoft OS going back to the early DOS days. When Win-10 arrived with all it's 'issues' I opted to change to an iMac.
Loved it until . . . CATALINA
Little issues have started reminding me of MS systems - And I don't like the feeling!
I recently upgraded my parents' 2017 iMac and encountered a similar yet different issue. I understand the need for a Mac HD and Mac HD - Data as part of the security of Catalina, but the machine ended up with 2 drives called "Mac HD - Data" after the upgrade. (To be fair I'm not certain it wasn't this way prior, but Time Machine is giving an error on backup related to the "duplicate" drives so I believe it's new.) Has any once else encountered this? Any ideas to solve? The top two volumes in the screen shot below clearly indicated Mac OS 10.15; the last one (selected) doesn't have any OS designation.
@JimForbes
believe it or not, I did have double back ups on separate hard drives. It was to no avail. The crazy thing is, I can enter time machine and “see” everything but can not access it. I can even search the data and items will appear but I click on them and the screen goes blank.
I go back in every couple of days to poke around and see if something is going to change but am not holding out any hope.
I have the same problem. I wish I would've researched all those issues regarding Catalina before I upgraded. After a complicated upgrade, I was just happy that it seemed stable. Now I just noticed Time Machine couldn't back up and I came looking for info and see this...three drives instead of one, back-ups rendered useless... I think my Mac days are counted. The mighty Mac is not what it used to be.
My inquiry is different. I upgraded from Majove to Catalina , but then I determined that Catalina was not working as satisfactorily for my needs as Mojoave. I then reinstalled Mojave. However, I still have both a HD and HD-Data folder characteristic of Catalina, but not Mojave. The computer works fine so far, but the HD-Data did not exist on my Mojove system (according to earlier versions of Mojave backed up on my external hard drive) before I upgraded to Catalina and then reverted to Mojave.
My questions are:
Thanks for any guidance that you can offer.
Before I risk losing any data, I need to understand whether there is any risk to leaving the situation where it is now. As I said in prior post, my computer works fine. Every time I muck around with rebooting and reinstalling, it takes enormous amounts of time, and something frequently will not work right until I finally figure out the problem, but sometimes with a substantial loss of time.
So, again, my question is: what's the risk of leaving well enough alone?
I "Upgraded" to Catalina. When I found out that most of my Apps were not compatible, I tried to revert back to Mojave via Time Machine. What a nightmare. I kept getting the message that it failed. I went into Disk Utilities and tried to erase the complete hard drive with the Data volume as I thought that would be causing the problem (it would only allow me to reformat as an APFS format not a Mac OS Journaled format) , but it would not delete the Data Volume.
I ended up erasing the Data volume several times and eventually I was able to reload my Mojave back-up, but I still have the Data volume showing on my desktop which is duplicate of the hard drive.
I have been amazed at all of the replies and issues folks are having.
Apple screwed the pooch on this one all in the interest of assimilating us into the Apple family with no real point of return. I embrace the security standpoint of the upgrade but the rollout and the issues it has caused make me wonder what is happening in the spaceship.
I have finally gotten my system stabilized but have never recovered so much data that was lost as a result of the eraser the update havoc wreaked on my system. This update caused TimeMachine to fail, every file in it is a useless 2kb or 4kb place marker and can not be recovered. I have gotten lucky with some things by literally clawing through the backups file by file to recover music and documents but past email folders and messages are dead and gone forever. Many years of Time Machine wiped out in an hour.....
It has been an absolute nightmare with daily occurrences of angst at not having an important document and hoping beyond hope I can dig it out of old hard drives stored on my bookshelf.
Cheers Apple.
Macintosh HD and Macintosh HD Data?
