Fixing a split Fusion Drive on a Mac with High Sierra MacOS, Mojave and Catalina
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- Опубликовано: 22 авг 2024
- ****From the comments below its evident that this quick fix has helped quite a few. And I've had a bunch of offers to buy a coffee...hence adding my Paypal link here. No compulsion whatsoever, but your support will help me spare more time to make Mac quick fix videos. Thank you.*****
paypal.me/nagapy
I recently purchased a used 2012 Mac with a 1.12 TB Fusion Drive*. As part of making a clean install of High Sierra, I somehow formatted the Fusion drive into 2 discrete drives - 1TB HDD + 128GB SSD. Some may like this but I observed a slow down so decided to create a fusion drive.
This video is about re-creating a fusion drive and see how it speeds up the boot-up and other processses.
*Fusion Drive: Fusion Drive is Apple' hybrid drive which combines a hard disk drive (HDD) with a NAND flash storage (SSD) and presents it as a single Core Storage managed logical volume with the space of both drives combined. The operating system automatically manages the contents of the drive so the most frequently accessed files are stored on the faster flash storage, while infrequently used items move to or stay on the hard drive.
Commands used:
Short Cut to open a utility/service: cmd + space....and then type for the utility of the choice:
terminal - to open terminal
disk utility - to open disk utility
Commands used with in terminal:
1. Listing disks (drives) - diskutil list (note HDD and SSD identifiers)
2. Create a CoreStorage - diskutil cs create MacintoshHD identifier1 identifier2
2.a Assuming identifier 1 is disk0 and identifier2 is disk1, the command would be: diskutil cs create MacintoshHD disk0 disk1
3. Generate CoreStorage information - diskutil cs list (note the Logical Volume Group information available on the top)
4. Create a logical volume from already created CoreStorage - diskutil cs createVolume logicalvolumegroup jhfs+ MacintoshHD 100%
4.a. Assuimg the logicalvolumegroup id is 8354AFC3-BF97-4589-A407-25453FD2815A, the command would be diskutil cs createVolume 8354AFC3-BF97-4589-A407-25453FD2815A jhfs+ MacintoshHD 100%
NOTE: If for any reason, the re-install is unable to complete, repeat the process step by step after checking your broadband and you should be able to get this done.
Adding a comment as I can't answer my question. My HD turned out to be a Fusion Drive - Apple's custom implementation of a Hybrid Drive which is a combination of a smaller SSD (Flash) drive and larger traditional HDD. In my case, size of SSD was 128G and HDD was 1TB.
With a single partition the OS sees the combination as a single drive - FusionDrive. However when you try and create a partition, it will reserve the OS installed part of HDD and entire SSD as "core storage" which can never be merged with the partitioned part - the only way is to format the entire drive.
If I were to have a HDD or SSD, it would be pretty straight forward to merge the partitions, unlike what I have faced due to the way "coreStorage" reservation.
I didn't this and I kept on doing several things to merge the partitions into a single partitions and while doing so, accidentally erased some.
Finally got it solved by booting in Firmware Recovery mode (cmd + alt + R) and erased everything and then merging the partitions manually using the following command:
diskutil partitionDisk /dev/disk2 GPT JHFS+ New 0b
Now that's HDD taken care of, but this lead to splitting of Fusion Drive. While this may be desired by some to have more control by having 2 discrete HDs, I prefer to leave it to the OS find the best way to deal with it.
So, followed steps in support.apple.... to merge the Fusion drive that was split.
That's why I created this video to demonstrate the last step.
This wasn't quite straight forward to me as I am new to Mac OS, despite being fluent in Linux.
Hope this information helps a Mac newbie like who doesn't mind getting their dirty by exploring things under the hood :-)
Good luck.
Courtesy: support.apple....
*****From the comments below its evident that this quick fix has helped quite a few. And I've had a bunch of offers to buy a coffee...hence adding my Paypal link here. No compulsion whatsoever, but your support will help me spare more time to make Mac quick fix videos. Thank you.******
paypal.me/nagapy
Can I just say a HUGE thank you for this video. After issues with partitions and some stupidity on my end I couldn’t re-install Macintosh as I had split the fusion drive. This worked first time THANK YOU!
Whoever you are...THANK YOU!! Outstanding video - you saved me hours of time that would have been spent going to/from the Apple store dealing with a "Locked" hard drive. Well done!
Thanks I sat on the phone with Apple for about hour, while they spelled every single letter or every command. So happy to have this guide.
My Man You Just Save my career After weeks trying to find a solution and I found this video and actually helped me what I needed Thank you soo much💯💯💯💯
Thanks a lot. I was confused before and now I got a clear idea of fusion drive and I’m now using it properly. 👍🏻
OMG, I don‘t know how to thank you for this.... I tried everything to fix it and nothing helped!!!! Thank you so so so much. 😮
Yup! You absolutely saved me with this video. It was a frustrating discovery to find mine was split. It’s all set now thanks to you. iMac is much faster and like new again.
tnq man...you save me.. hope you happy every time
Congrats! It was the most useful tutorial I’ve ever seen. Thank you very much!
This was very good the music almost put me to sleep but other than that very helpful thank you
man thankyou sooo much you helped me a lot
THANK YOU THANK YOU THANK YOU!!!! I was able to save my fusion drive without deleting my bootcamp partition :)
Thanks a lot! saved me from a big trip to genius bar which i doubt they could fix.
You save my life. Thanks a lot Bro!!!
Thank you so much!!!!
thank you so much bro.
wonderful, you saved me man, I follow your instruction and it works like a charm
Man, Love your video - pure pro & beautifully different!
Thanks a lot. The video was very helpful
Glad you found it useful. Great saree BTW!
@@NagaYanamandala thank you 😊
I was struggling with my mac and thanks to your video I finally fixed it👌😅
Thank You. Very useful. Helped a lot.
Thank you so much! Your video helped me a lot!!!
This worked for me! Thank you,I could re-install windows :D
Thanks a lot you saved me
Awesome!!! You are awesome. Nicely Done.
Muchas gracias!!!
Extremely helpful. Thanks a million!
It only took me two hours to get here THANK YOU! If u have a Venmo I'd be more than happy to buy you a drink cheers 👽🖤
Glad you found the tutorial useful, Alandria. Thanks for subscribing as well. WRT buying a drink - thanks for the offer, but I am happy for you to donate the money to the charity of your choice.
Thank you so much. This a very good guide to fuse them back together. Love you.
You have saved my life thank you so much
Thank you! this truly saved my fusion drive!
Cheers
Man you are the king ;)
Grate video easy to follow thanks
Thankyou very much brother
You save my day 🤩 thank you very much, nice tutorial
Thanks bro🥰🥰😘
Thanks so much. This is gold!!! Saved me lots of hustles
Thank you so much, you've saved me and my iMac
That was so helpful! Thank you man!
THANK YOU! THANK YOU! Straight to the point. Awesome!
Thank you sooo much! By far the best video with the most clear cut instructions!
This was an amazing an detailed guide. Thank you !
ATTENTION Depuis l'OSX Mojave :
3. Saisissez la commande "diskutil resetFusion" dans la fenêtre de Terminal, puis
appuyez sur la touche Retour.
4. Lorsque vous y êtes invité, saisissez Yes (avec un "Y" majuscule), puis appuyez sur la
touche Retour.
(Source Apple Support)
thank you very much
Great video! THANKS!!!
Thank you!! You saved my butt!
Bro，Thank you for your help
Thank you good sir!
Muchas gracias me fue de mucha ayuda.
SUPER!
Thank You.
Thanks bro for your help😘
thx
Thanks you so muchhhhhhhhh ☺️👌
Great job- well done!! Go ahead
Thank you very much. macOS Mojave break down my fusion drive. I don't know why
Thank you!!! saved my life...
Thanks my bro 😎😎🙋
I am changing my internal HD for a SSD on my iMac (21.5 late 2015). Is there a point in doing what you suggest in this video once I get rid of my spinning drive? I will have a 24 GB UFS + the new 1 TB SSD. Should I try to turn them into 1 volume, or should I keep them apart? Many thanks!
If you're using macOS Mojave or later. Type ‘diskutil resetFusion’
Aaron Yip THANKS A LOT! YOU JUST EARNED A SUB ON YOUR CHANNEL! WORKED LIKE A CHARM! 💕
Legend!! Too easy Cheers
Thank you!
Thank you!!
Glad you found it useful. How did you split yours? Manually by mistake or did the Fusion drive crash? Please browse through the Mac Tutorials playlist for other Mac DIY. I will be uploading more such tips/tricks in the next weeks, so please subscribe to the channel to stay informed :-)
THANK YOU!!!
Thank You Very Much!!!!
Does it reformat the drives? Is there any risk of data loss? Is the disk space on the SSD used as a mirror of data on the HDD (eg. Does the total disk space of the Fusion drive = the SSD + the HDD capacity, or is it the HDD capacity with the SSD mirroring frequently used files?
THANK YOU 🙏
Great!
WARNING.... My computer came from Apple with a Fusion drive. I had some strange errors, but Disk Utility kept reporting "Status Verified". However, running SMART Utility clearly shows that the HDD was reporting FAILING status.
Disk utility DOES NOT correctly report SMART status for the component drives in a fusion drive.
Hi! This is Apple! That’s one of our new “Fuck You Features” we know you love Apple products and hope to see you again in the future!
Haha just kidding.
Hello, Thank You for the video. I have a problem though. I followed all the steps successfully until the step to install the OS. The OS in question is Catalina. In this step, I got the message "This volume is not a supported Core Storage Configuration" and sent me back to Utilities. I'll appreciate any input.
Hi, looks like the fusion drive setup hasn't succeeded, please refer to support.apple.com/en-is/HT209158
THANKS BRO
Does this work on 2 SSD drives, instead of 1 HDD and 1 SSD stick?
it wouldn't let me do the diskutil cs create MacintoshHD part it said it doesn't recognize create and to use diskutil coreStorage
Hi, did you check the detailed description for all the commands?
You need to start by realizing the fusion drive is a horrible design and mistake by Apple. NEVER ! get a fusion drive they are doomed to fail.
Hello
i'm using a 1TB HDD drive iMac now.
Can i buy a 250GB SSD now to Fuze them together without having to lose any of my data in the iMac 1TB drive
Instructions on apple website: support.apple.com/en-us/HT207584
Does this work with all Mac ? i have the MacPro x early 2015 one. Mine also happen to be split.
Yes it will. These instructions, as mentioned in the description, from Apple help and they seem to be common for all models with Fusion drive. Good luck!
Nāga Yanamandala thanks you
Anyone else suffering from vertigo after watching this?
Will this work for Catalina?
why did you need to put this creepy music instead of your voice?
This was one of my very first videos and I was experimenting with it, the next Mac tutorial has my voice. Sorry if the music has distracted you but I hope the content was helpful. If you check out the description, I have captured all the details there!
Nāga Yanamandala I don’t think this music is creepy at all! I like it a lot. What is the name of it, and who is playing it?
Amigo me salvaste muchas gracias me suscribo en verdad gracias por el aporte, aunque una pregunta si hice mi respaldo en time machine pero era cuando tenía el SO de mac en el SSD y ahora que quiero volver a tener ese respaldo me dice que no se puede debido a que se utilizó un formato apps (el nuevo formato para discos SSD)como lo puedo recuperar?
Marck Juarez Hola Marck, me alegro de que lo hayas encontrado útil. ¿Hace cuánto tiempo se hizo la copia de seguridad? ¿En qué formato estaba originalmente tu SSD? ¿Puedes subir la captura de pantalla de error a algún lugar y compartirla? No he usado TimeMachine durante mi proceso de instalación, ya que no creé ninguna copia de seguridad, pero estoy seguro de que debería ser bastante simple. Gracias por suscribirse al canal. Esperamos su respuesta.
Marck Juarez (same response as above in English, just in case Google translate made any illogical translation) Hi Marck, glad you found it useful. How long ago was the backup made? What format was your SSD originally in? Can you upload the error screenshot somewhere and share it? I haven't used TimeMachine during my installation process as didn't create any backups but I am sure it should be pretty straightforward. Thanks for subscribing to the channel. Looking forward to your response.
how to get the terminal in the start screen
Cmd + space brings up Spotlight search. And then type in "terminal" and press return. That should open Terminal unless your admin restricted you.
@@NagaYanamandala my cmd+space open siri
After reloading my MacBook Pro, I now have two Macintosh HD and two Macintosh HD - Data drives. Can or should I combine them?
Hi Mark, do you have a fusion drive? If so, looks like you have split drive. To fix it, you need to follow elaborate process shared in the video. If you aren't sure about what needs to be done, just walk into an Apple store or call Apple help and they should be able to help you.
Nāga Yanamandala Yeah, when the Apple stores open up. I don’t think I have a fusion drive. I have never heard the term.
@@markclason2717 How old is your Macbook Pro? I think the latest Macbook Pros have a flash HDD. FYI a fusion drive is a combination of a flash HDD and a traditional HDD. Flash HDDs are faster than traditional HDDs but used to be very expensive. So a Fusion drive is a good compromise.
If you don't have a fusion drive, this video isn't relevant to the issue you see right now.
Nāga Yanamandala I have the last model before that touch bar thingy everyone seems to dislike. 2015?
@@markclason2717 Can you click on the Apple icon on the top left corner and then on "About this Mac" and then on the "Storage" tab. This show the size of your hard drive and also it's type. Mine says it's a 1.12 TB Fusion Drive.
Podria por favor hacerlo en español?
Fusion Drive will work without issues on High Sierra? Or APFS is the problem?
Yes of course. With a healthy fusion drive, the OS knows where to go - gets installed on the flash drive and uses flash storage to runs it's processes. With a split fusion drive, you can manually install the OS on the flash drive but the OS would lose the ability to effectively manage the data and this slows down the OS. If you install the OS on the disk drive, it's even worse as it slows it down straight away!
Do I have to backup things before doing this?
Yes, back up your personal data unless it's sitting on a different partition.
@@NagaYanamandala thanks
Can this be done with 2 ssd drives inside macbook pro?
Should be able to do with any 2 drives.
Yes. Two INTERNAL drives. You cannot do this between two external drives or an internal and external drive. It won’t let you do it since if the external drive became disconnected, the hard drive would cease to function. I would imagine a serious system crash.
How can I contact you? Email id?
Halo reply please.
Hi Vijay, if the detailed instructions in the video and the description didn't help, I don't think I can offer any more help.
I suggest that you call Apple for help.