Questions tagged [core-storage]
Apple Core Storage (sometimes referred to as coreStorage or CoreStorage) maintains a world of virtual disks that can provide the user with flexibility in allocating their hardware.
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Booted to Windows how do I enable access to a Mac CoreStorage volume?
I've installed Windows 8.1 with the Boot Camp Assistant on a solid state drive with a CoreStorage volume. Booted to Windows I can't see the files on my Mac volume anymore.
I'm confused since this is ...
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Lost hard drive space to Boot Camp
Boot Camp caused ~200 GB of my 750 GB HD to disappear and I cannot re(un)-partition it through Disk Utility and when I try to reformat the storage through the terminal using:
diskutil cs resizeVolume
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Fusion drive unavailable after HD erase
I wanted to erase the 3 TB Fusion HD on my iMac in order to install a clean system and start from scratch. The erase went fine except right at the end when it said something about core storage... (...
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How can I encrypt a disk where diskutil cs convert reports "a problem", leaves disk unreadable?
I'm trying to encrypt my Time Machine backup volume, but diskutil refuses, and leaves the disk unreadable (but repairable using Linux). How can I proceed?
It's a Western Digital Elements 107C 3TB ...
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How do I remove unused partition (El Capitan)?
I have a partition that I no longer use. I've tried erasing with the disk utility GUI, but when I try to remove (with the '-' minus button on the partition view) this feature is disabled. I've also ...
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I erased the partition where Windows 10 was previously installed. How can I merge it with my OS X partition?
So I started up Disk Utility and erased my BOOTCAMP partition and set the format to OS X Extended (Journaled).
This is how my partitions look like now:
As you can see, I have a BOOTCAMP partition (...
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Apple watch not syncing Health data
As the title suggests, my apple watch is working perfectly in termos of fitness tracking, the problem is in saving the data, the activity app on the Apple watch shows the activity rings full but the ...
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Crashed when creating a partition - now missing drive space!
Just a couple of hours ago, while I was taking a GNU course, I decided to create a partition on my SSD to have ubuntu installed, meanwhile the disk utility was doing that, suddenly it just crashed and ...
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What's wrong with my Fusion Drive?
I'm having weird issues with my internal Fusion Drive.
Symptoms:
It gave itself a new cryptical name, and I can't change it back
In most cases I cannot install new software anymore (e.g. I cannot ...
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Is it possible to use diskutil to manipulate the read/write buffer of the SSD portion of the fusion drive?
Has anyone been able to use diskutil to manipulate the Core Storage LVM into increasing the size of the read/write buffer of the SSD? Currently the Fusion Drive keeps 4 GB free for new reads/writes. ...
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How can I manually force a file of a Fusion Drive to the SSD?
From what I understand, the implementation of the Fusion Drive is at the OS level (coreStorage). Yet, I want to know if it's possible to manually interfere in the management for a specific file or ...
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What techniques for disk, volume and file system management are possible with OS X, but troublesome within Disk Utility?
In the past, Disk Utility was the best starting point for the vast majority of disk-related tasks.
As technologies within (or possible with) OS X have developed – without equal development of Disk ...
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Unable to access neither Partition Layout nor Option tab in Partition tab on Disk Utility
I have a problem that I cannot select Option tab in Partition tab as shown in above screenshot. I wanted to convert my external hard disk to GUID partition table.
Thank you in advance for your help.
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How can I resize a partition on OSX 10.10.5
I have a Mac with OS X 10.10.5 on a HD which had 4 partitions.
Using Disk Utility I deleted one of the 4, intending to slightly grow the 3rd (containing the OS), leaving space for a new partition to ...
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How do I resize an ex-CoreStorage volume?
I've got a Macbook Pro Retina (with the PCIe drive ‘blade’, instead of a traditional 2.5" laptop drive). I've recently upgraded the internal drive from 500GB to 1TB, and dd'd the old drive over the ...
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Reclaim SSD space from deleted partition
I have a very similar problem to one that was answered here, but I don't know how to apply the answer to my mac.
MacBook Pro 15", Late 2013, 2.3GHz/16GB/512GB, Yosemite 10.10.3
I was attempting to ...
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How to recover this damaged CoreStorage PV records?
I have played something following https://www.reddit.com/r/osx/comments/2wzlxc/a_corestorage_primer_aka_why_you_cant_manipulate/ ,like:
hdiutil attach -nomount ram://$[2048*1024]
diskutil cs ...
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Unable to restore/reinstall/erase from recovery
I've just tried to install the El Capitan GM, which failed half way through with the error "This Core Storage operation is not allowed on a sparse logical volume group" and gave me the option to ...
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How do I repartition my Mac to get rid of my dual boot setup?
I setup dual boot on my Mac (with Ubuntu) and want to get rid of it. The Disk Util GUI shows me:
However attempting to remove the disk0s4 or disk0s5 partitions results in:
Could not unmount ...
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Why can I only have 2 partitions on my 3TB Apple Fusion Drive?
According to Apple, I can only have 2 partitions on my 3 TB Fusion Drive. I do not understand why. Techtool Pro made an eDrive, their emergency boot drive, and Apple made their Recovery HD. It ...
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Will FileVault 2 wear out my SSD faster?
I'm considering using FileVault 2 when I upgrade to Lion. Though my understanding of it is weak, it seems as though it shouldn't really increase the number of reads or writes per disk operation ...
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How to rename (main) hard disk back to default? And is the disk default really LVG?
I recently reinstalled OS X, when it asked me to erase the disk I just left it Untitled, since there's no instruction to rename it to whatever on this Apple support page, after restoring with Time ...
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OS X Partition not resizable
3 weeks ago I installed Yosemite public beta onto a brand new Macbook Air which arrived with Mavericks pre-installed. To carry out the installation I created a new partition for Yosemite and so had ...
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Logical Volume Group 17gb "Available Space"
Can anyone help explain why there is 17 GB worth of free space on my LVG I can't seem to do anything with this space. Is there anyway to fix this? I have already reformatted the disk then cloned the ...
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Broken fusion drive - SSD size is 0B and 'No CoreStorage logical volume groups found'
Some context first: I have late 2012 iMac 27" with 1TB fusion drive. Some time ago, for whatever reason, the SSD drive became visible in Disk Utility. I happily used the drive for Yosemite and ...
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Cannot partition Macintosh HD
Pre P.S. From what I read online, sharing your UUID is not really a security issue, but if I just basically shared my social security number, please do tell.
Before I ask this, I'm a PC person and ...
grg♦
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Why does Disk Utility show one "Macintosh HD" as a logical drive and another that says core storage physical volume
I am trying to figure out why I have 2 Macintosh HD Drives Appearing in disk utility.
One of them i can mount and shows it as being a logical drive and the second one i can't mount but it says it has ...
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Why does Disk Utility show "Macintosh HD" on both Logical Volume Group and the volume underneath?
After performing a clean install of Yosemite (erasing the entire disk using disk utility during installation), the original name of the disk (APPLE HDD HTS547575A9E384 Media) turned out to be "...
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Can someone explain what 'diskutil cs revert' does?
so I was following some instructions to get my windows bootcamp partition to resize in disk utility, because after upgrading to Yosemite I was unable to resize my partition to give one side more space ...
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Restoring Fusion Drive after error on partition erase
I think I'm lost and need some help with my Fusion Drive.
I have new iMac Retina 5k with 3TB Fusion Drive and preinstalled Yosemite.
Things I did so far:
I was working on my iMac and had ...
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Unable to reformat/repartition CoreStorage logical volume (Fusion drive)
I created a fusion drive on my MacBook Pro running Mountain Lion and it worked like a charm for a while, but it somehow got corrupted.
Now I am unable to reformat or repartition the whole thing.
>...
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Is it safe to convert Core Storage partition to HFS+?
I just got my new Macbook Pro, I tried to make two new partitions using Disk Utility but I could only create one. After googling I found out that I can't create more than one additional partition in ...
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Problem after erasing the HD of a brand new Mac (OS X Yosemite) with Disk Utility
I cannot reinstall OS X Yosemite now, as there's no hard drive I could see.
I had erased the HD with the idea that it will create a new partition but it didn't, so now I can't see a hard disk on ...
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How to add free space to a Logical Volume Group? (Resizing Partitions)
I have two CoreStorage volumes on disk, one is 200GB the other is 50GB. I want to make the 1st 125GB and the second one 125GB.
Currently I have been able to use the diskutil cs resizeStack command to ...
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Partition SSD in Yosemite for Dual-Booting Ubuntu
I've just bought a new Macbook Air (running Yosemite) and I am trying to create a partition from my Macintosh HD SSD for dual-booting Ubuntu. However when I try to create a partition in Disk Utilities,...
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I can't create a second partition in Mac
When I go to my disk utility, my main hard gives me results like this
It's showing capacity 499gb but only remaining 10mb. Now please see the second image
What's happening with my Mac?
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Is there a way to manually repair a CoreStorage volume?
I was playing around with CoreStorage on a test disk and used the undocumented commands cs addDisk and cs removeDisk. The addDisk command worked just fine and was able to expand a logical volume group....
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Can't delete partitions after attempting BOOTCAMP on my iMac 5k
I recently tried to install a bootcamp instance of Win 7. The install failed for some reason. This left me with a partition that I can not access via Disk Utility
If you notice..the +- can not be ...
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re expand a partitioned disk
The internal disk of my Mac book pro is partitioned as follows:
% diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: ...
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diskutil shows Macintosh HD is missing (with Recovery HD occupying the entire space)
So yesterday I managed to screw up my iMac 2012 (with Fusion Drive) by installing the Mac OS X 10.10.2 update... The installation stalled and when I tried to restore from an external drive using Time ...
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Clear free space in Disk Utility
So I recently removed Windows 7 from my iMac, but Bootcamp didn't let me do it. I used Disk Utility instead. The old Windows 7 partition now shows up as free space. I want to reinstall Windows 7 again ...
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How can I verify that a DIY Fusion Drive is working as it should?
I installed an SSD in my 2011 Mac Mini to run alongside the stock 500GB HDD. After carefully reading through a number of tutorials, I used Terminal to merge them into a single "Fusion Drive". I cloned ...
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Why can't I delete the second partition
So I was playing around with Disk Utility today. I created a second partition. Format is Free Space.
How do I undo this? As in, I want to have just one primary partition "Macintosh HD"
I've tried:
...
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Can't ever remove partition?
Running Mountain Lion.
I added a partition with Disk Utility and then had second thoughts about it. I'd like to remove the partition i created, MacSSD2 and hand over its space back to MacSSD. As you ...
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CoreStorage encryption fails - Is it possible to have multiple encrypted partitions on an external drive?
I have a 2TB WD MyBook Studio drive connected via FireWire to my MBP. What I would like to have is two encrypted partitions. So what I do: Disk Utility > Partition and then right click on each ...
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Delete CoreStorage Volume even as OS X won't acknowledge there is one?
I installed Yosemite on an external 3TB drive. I made a specific 300GB partition on it to hold the system and a second for data. Installation worked fine. However, according to Disk Utility in both ...
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Why does my 3TB Seagate HD keep formatting as a Logical Volume Group
This is really annoying. I have a brand new Seagate 3TB 7200 RPM hard drive that I am trying to format/partition in Disk Utility. Every time I change any settings or erase the drive, it changes it to ...
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How can I rename a Logical Volume Group?
I have noticed that while I can safely change the name of the Logical Volume (LM Volume) in /Volumes (currently: Apple SSD), I cannot find a way to change the name of the Logical Volume Group (...
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how do I get everything back to normal (partition issue)
Okay, so I've recently shifted to Mac from Windows. I was curious to check out what the Yosemite OS looked like, and hence I downloaded the beta and had it up and running. It was downloaded on the ...
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Can I have both a case-insensitive system volume and a case-sensitive volume within an encrypted CoreStorage volume?
( seems possibly related to Is it possible to have multiple filevault2-activated partitions on one disk? )
I have a MBP with a single internal SSD and I'd like:
to have everything on the disk ...
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