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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8answers
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Can I make a DIY Fusion Drive?
I have a Mac Mini with two drives: a 256GB SSD and a 500GB HDD. From what I've read, the new Fusion Drive does all of it's magic in software, using the Core Storage APIs.
Can I get my setup to ...
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16answers
2k views
Apart from being able to encypt an entire volume, what are the other differences of FileVault 2 over FileVault?
Does FileVault 2 in Lion have any other differences compared to the old version, FileVault in previous releases of the system? Are there any additional benefits to using the new version?
9
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3answers
630 views
What happens when you remove (or lose) the SSD from a Fusion Drive?
After storing data on a Fusion Drive, is it possible to downgrade your Mac to use the hard drive (HDD) by just removing the solid state drive (SSD)?
In particular, I was wondering what happens when ...
8
votes
2answers
2k views
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 ...
7
votes
4answers
6k views
DIY Fusion Drive: Adding Recovery HD to a CoreStorage Volume Group
After creating a "DIY Fusion Drive" using the methods below in 10.8, I'm now wondering how to add a RecoveryHD partition to the internal drive.
Here's what I did to create a Logical Volume Group ...
3
votes
1answer
294 views
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 ...
2
votes
2answers
3k views
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 ...
2
votes
2answers
659 views
What is the layout of a real Apple supplied fusion drive?
Would someone who has a fusion drive that they bought directly from Apple please provide diskutil output sufficient to describe the choices they made?
I've seen lots of different sets of advice for ...
2
votes
1answer
517 views
How do I see disk usage within a Fusion Drive (CoreStorage Logical Volume)?
I just created a "Fusion Drive" on my MacBook Pro by following "How to make a Custom CoreStorage Drive in OS X".
It was created with a 256GB SSD and 320GB HD, with the SSD set as the "primary" disk ...
2
votes
1answer
502 views
FileVault (CoreStorage) + Linux partition
Quick question here. I'm not really familiar with the requirements of CoreStorage so I'd like to confirm with you guys before I start working.
I'm currently running OSX Lion on my MacBook Air, with ...
2
votes
0answers
122 views
How do I troubleshoot appalling write performance on DIY Fusion Drive?
I recently bought a 120 GB OCZ Vertex 3 and stuck in my 2009 Macbook White, together with a optibay-adapter for the old 500 GB HDD and configured them as a corestorage "fusion drive" by using the ...
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vote
2answers
2k views
Disk Utility Error “Storage system verify or repair failed”
Installed Lion on a brand new HDD. Boots fine, but when I run Disk Utility on the Media, it reports
Verifying partition map for “WDC WD10JPVT-16A1YT0 Media”
Checking prerequisites
Checking the ...
1
vote
1answer
317 views
The encryption of an external drive in 10.7.5 does not seem to work. “Conversion Status: NoConversion”
On a Mac running OS X Lion 10.7.5 I have attempted to encrypt an external drive using Disk Utility.
Since this is 10.7, there is no option of right-clicking to encrypt in Finder. Also, there's no ...
1
vote
1answer
1k views
OS X Mountain Lion does not boot after the creation of a Fusion Drive
I have followed a guide to set up the core storage logical volume to use one SSD and one HDD.
Since then, I have encountered multiple errors such as:
69822 Couldn’t rediscover disk after operation
...
1
vote
1answer
300 views
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.
...
1
vote
1answer
412 views
Split an Apple-supplied Fusion Drive back into two separate volumes?
Is it possible to take an Apple factory-created Fusion Drive and downgrade it into two separate volumes? I understand this would also necessitate reinstalling the OS and Recovery Partition etc.
The ...
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vote
0answers
199 views
Where does a Fusion Drive store Time Machine local backups? Should I disable local backups?
Time Machine in OS X does store local backups (snapshots) on the local harddrive if you have Time Machine enabled.
Even if you backup regularly, the size of the local backups increases steadily. In a ...
0
votes
1answer
35 views
How to backup an encrypted Core Storage volume off-site?
Given a hard disk with an encrypted Core Storage volume (but not the decryption password, because the backup service should not have access to that), how would one go about backing it up in a way that ...
0
votes
1answer
506 views
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 ...
0
votes
4answers
692 views
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 ...
0
votes
1answer
623 views
Apple-provided software to measure or estimate the CPU load associated with Core Storage
With Mac OS X 10.7 (Build 11A411) alone, or with Xcode 4.1:
Q: is there a way to accurately measure, or at least estimate the CPU load associated with Core Storage?
A graphical view of load on a ...
0
votes
1answer
56 views
What's the significance of non-checkpoint transactions in Core Storage?
Often in output from fsck_cs(8) – typically in the window of Disk Utility in Lion and Mountain Lion, whilst verifying or repairing something in Core Storage world:
Incorporate 1 newer non-checkpoint ...
0
votes
1answer
259 views
Understanding kernel panic error log
My MacBook Pro worked all normal when all of a sudden it went black. It tried to reboot itself but immediately produced a kernel panic.
From then on I was never able to boot again. I could only enter ...
