Apple's built-in disk management utility for the mac. Erases, formats, and restores volumes and drives.

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2
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1answer
3k views

Unable to read last block of the device

I'm mid way through replacing the hard drive in my MacBook Pro (mid-2009). I've created a boot disk (10.8) on a SD card which I am booting from. On trying to format the new drive with disk utility ...
3
votes
1answer
108 views

Does using “rm” command cause journaling corruption?

Some time ago I had some problems with my Mac drive, so I went to the recovery partition and used Disk Utility to check for problems. It reported a huge discrepancy between the journaled free blocks ...
0
votes
1answer
744 views

Is it safe to reformat drive during Recovery Mode install?

I've inherited an almost brand new 13" Macbook Pro Retina. I'd like wipe the hard drive clean and start with a fresh install of Mountain Lion. I've done this a million times before... but never while ...
3
votes
3answers
7k views

Recovering data off of a dead hard drive

My hard drive died in my macbook and it no longer will start up. It will not mount in an external enclosure but disk utility is still reading that the hard drive is there, and I tried to repair disk ...
3
votes
1answer
396 views

In Disk Utility, what advantages do “read/write disk image”s have over “sparse bundle disk image”s?

If I want a read/write disk image, then aren't sparse bundle disk images always the way to go? They start at 0 kb in size, and grow to accommodate whatever you add to them, and if you delete stuff, ...
0
votes
1answer
128 views

How do I copy an NTFS partition to a writable disk image?

I have a drive from an old Windows computer. The drive is now in an enclosure, so it's accessible as if it were an external drive. It is formatted as NTFS. I would like to convert this drive (about 50 ...
0
votes
1answer
287 views

Merge two disks to RAID 0 and keep my installation

I've got two 128Gb SSDs installed in my MacBook Pro. Originally I had one for the system (named Calcium), and one for the /Users folder, symlinked into the first (named Users). As I ran out of space ...
0
votes
0answers
19 views

Password Protecting Folders in OS X? [duplicate]

What methods exist (either inbuilt or via third party) to password protect (encrypt) folders within OS X ?
2
votes
1answer
265 views

Is my SATA cable damaged?

Macbook Pro Mid 2012, original SSD. TLDR; Why could I clone my unmountable drive from an external enclosure but not internally? My SSD broke down a few days ago. It was detected, but I was unable to ...
1
vote
1answer
186 views

When creating a RAID 1 mirror set, do you need to have both disks available or can one be added later?

I'm planning my transition to Mac OS and I have a pair of mirrored drives I would like to move to my future computer. Since they are currently formatted as NTFS they will need to be reformatted during ...
6
votes
3answers
5k views

Creating boot disk for Windows 7 on MacBook Pro

EDIT: I gave in and burned the DVD from a windows PC and I was able to install Windows on my MacBook Pro with Bootcamp. Sorry, that I don't have a satisfying solution. My goal is to install Windows 7 ...
1
vote
0answers
140 views

Increased the Size of Bootcamp Partition but Winclone Restores Old Size Partition

I followed all documented steps to increase the Bootcamp partition size on the Mac OS 10.5.x. I used Winclone, Disk Utility and Bootcamp Assistant to perform this operation. In short, I cloned Windows ...
0
votes
4answers
6k views

Forgot my password to a disk image (.sparseimage)

I'm in trouble right now. I used Disk Utility to create a sparse image and I cannot remember the password, when I created the file I didn't select to remember in keychain. Now, I try to enter the ...
7
votes
2answers
4k views

How to fix Disk Utility, About This Mac, and Finder that disagree on hard drive space usage?

Has anyone seen this issue and know how to fix it? Look at the free space reported by running "Get Info" on my hard drive (Macintosh HD) in the Finder, "About This Mac" from the Apple Menu, and Disk ...
0
votes
1answer
179 views

I stopped Time Machine and I lost my files

I have a huge problem. It seems that I erased 1TB of my husband´s pictures (he is a photographer). He has a 2TB Verbatim external disk and today I was kind of playing with Time Machine. I don´t ...
1
vote
1answer
43 views

System Images with different Model Identifiers

I have been tasked with creating a default system image to use to both back up and use to deploy to new systems. After checking the stats on the 7 systems in question I've found that there are ...
3
votes
4answers
8k views

Unable to increase Macintosh HD partition size with data in a subsequent partition

I can't make my main Macintosh HD partition bigger. It's limited by the FAT partition in the middle, which seems to be frozen, I can't move it down to make space for my main partition. To get some ...
0
votes
1answer
70 views

Time Capsule unmountable: Invalid B-tree node size

Some time ago my Time Capsule suddenly stopped working. Running Disk Utility on it gives me this error: Is there any way to fix this issue?
3
votes
1answer
234 views

What is the function(s) of the hidden Debug menu in Disk Utility?

What is the function(s) of the Debug menu and why is it hidden by default?
0
votes
0answers
655 views

Dual partition a large drive for use by Mac and Windows

I have a 3TB USB3 drive that I want to use between my Mac and Windows laptops. A 1.5TB partition will be used for Time Machine and another 1.5TB partition will be used by Windows for file storage. ...
0
votes
1answer
2k views

How To Enable The “Hidden” Debug Menu? [duplicate]

Following on from my previous question entitled "What is the function(s) of the hidden Debug menu in Disk Utility?". How do I enable the Debug Menu via Terminal command or otherwise, thereby ...
1
vote
0answers
407 views

RAID 1 array degraded, now not being recognized by OSX

I've got a pair of Seagate 3TB HDDs in a mirrored RAID 1 array using a Vantec NexStar MX two-drive enclosure. The setup has generally worked fine for the last four months, but lately I've noticed that ...
0
votes
1answer
98 views

Apple Software RAID: Add disk to array online

I recently purchased a WD Thunderbolt Duo, which has two 4 TB drive, now running in RAID 0 with Apple Software RAID. My question is simple, if I am to get another Thunderbolt Duo next year, is it ...
3
votes
3answers
1k views

Why does RAID 1 “Mirroring not provide performance improvements”?

I have always used Software RAIDs, either Apple-provided, or via SoftRAID, etc. I am about to re-zhuzh my arrays and decided to do a little research beforehand… and On Apple's site, there is a ...
5
votes
2answers
865 views

How can I make my computer believe a disk image is a hardware disk?

I'm trying to do some research on TimeMachine right now. I don't want to purchase an external hard drive, just to learn about some software, and so I'd like to be able to tinker with the settings, by ...
6
votes
4answers
4k views

What are the sector sizes on Mac OS X?

I read on the HFS Plus Wikipedia page that the default sector size on a Mac is 512 b. However, I also read that Macs support 4kb sectors. How can I determine which I have, 512 b or 4 kb sectors? I ...
0
votes
1answer
68 views

Problem with permissions

on my Lion Server I have noticed that the permissions for certain folders seem to be screwed up. When I look at the Get Info for the folder I see strange things in the permissions section. There are ...
2
votes
0answers
340 views

How do I write-protect a partition of a USB drive on OSX that can work cross-platform?

I bought a bunch of USB sticks that I want to give as a gift to friends and clients, with some files on them. I'd like to have the files non-erasable (though I realise they can format the drive, I ...
1
vote
1answer
154 views

fsck_hfs keeps crashing when trying to repair my Time Machine volume

I've got my Time Machine volume (direct attached, USB) corrupted by accidentally flicking the switch while it's running. Now neither Disk Utility nor fsck_hfs can repair the drive. Investigating it ...
1
vote
1answer
233 views

Resize Boot Camp partition

I installed Windows 8 on my MacBook Pro using Boot Camp. Now I've figured out I should have made the Windows 8 partition bigger. Is this safe to attempt using Disk Utility? If not, how do I go about ...
0
votes
1answer
31 views

Any need to verify disks after hard reboot?

About every few days I need to reboot my 2012 MacBook Pro Retina. I noticed these messages in the logs regarding "Journal is read-only and journal is dirty. Can not mount volume". Any need to ...
0
votes
1answer
347 views

Bootcamp assistant won't let me increase the Windows partition

I'm trying to install Windows 7 on my Mac. The Bootcamp Assistant won't let me increase the Windows partiton's size above ~45 GB. I've got 200 GB free out of 500 GB on my SSD. I run Disk Repair, but ...
2
votes
1answer
328 views

Does mounting a large disk image require a certain amount of free space on the internal drive?

I've got a bunch of Mac disk images (.dmg files) that are 100 GB or larger. I'm currently on an iMac with a few hundred gigabytes of free space, but I'm going to be moving to a Mac laptop with 128 GB ...
5
votes
4answers
6k views

How do I repair permissions of a specific directory?

I want to repair permissions of a user defined directory along with it's subdirectories. How can I do this? So far, I've looked for options in finder and tried to drag the folder into Disk Utility. ...
2
votes
0answers
156 views

MacZfs with encryption on os-x

I have followed these steps for setting up zfs (maczfs 74.3.0, OSX 10.8.3) with encryption. Everything works fine, till I restart the computer. After the restart, diskutil informs me that the file ...
2
votes
3answers
5k views

Unable to resize Lion partition

I decided to do a clean install of Lion on a new partition, then after copying my stuff removed the old one. I'm now stuck with 100~ GB of free space and a 20 GB partition that Disk Utility won't let ...
2
votes
3answers
748 views

Understanding how safe boot fixed a boot problem

Background My friend asked me to look at her early 2011 Mac Mini with OS X 10.8.3. She said that: she installed software updates she couldn't remember which updates were installed when the Mac ...
-1
votes
3answers
587 views

How to auto-run disk repair on OS X after each system crash?

How to auto-run disk repair on OS X 10.8+ after each system crash? Note: I am not looking for a manual solution.
1
vote
0answers
288 views

MacBook Pro Mid-2009 13 inch does not recognize replaced hard drive

As the title states, I recently got a used Hard Drive from another MacBook Pro and installed it into my MacBook. The problem, is the laptop will not recognize it at all. The old hard drive just goes ...
0
votes
1answer
316 views

Carbon copy cloner to image OS X lion and restore from disk image

Is it possible to create an image of my 64gb 2012 Macbook Air using Carbon Copy Cloner so that I can recover from that image (if my Mac does not boot) when I am not connected to the internet? I can ...
2
votes
1answer
2k views

Disk Utility: Incorrect number of file hard links

I'm running Mountain Lion on my Mid 2009 MBP. Recently(for last few months) it's acting really slow. Simplest actions are taking forever to perform. So I verified disk using the Disk Utility and it ...
3
votes
3answers
2k views

Secure erase drive in Single User Mode

My 2007 Macbook Pro has suffered from a failure of its GPU and will now only boot in Single User mode. I want to sell it on eBay for spares, but obviously I don't want a hard drive with live data ...
0
votes
1answer
550 views

Can a file be copied to one hard drive in a RAID 1 mirror set (software RAID), and later have the 2 drives sync up?

I think I read that we can set up a RAID 1 mirror set (software RAID) using OS X Mountain Lion using Disk Utilities, and later plug in one drive and copy a file to that drive, and later on, plug both ...
0
votes
0answers
327 views

External Harddrive is showing in System Information but not Disk Utility

My harddrive crashed last night and since then I have not been able to access it on my Macbook Pro. I've restarted both my computer and hardrive multiple times and I've experienced the same result. It ...
1
vote
1answer
609 views

Can't do anything with external hard drive, “.Trashes” is probably the boogyman

I bought an external Samsung hard drive today. But I'm not able to do anything with it. Here are the problems I'm having: I can't put anything on the hard drive. Finder gets stuck at 'preparing ...
0
votes
1answer
87 views

Hard Drive Preview / Disk Utility Used Space Discrepancy? [duplicate]

So I recently cleared a lot of space off of my hard drive as a sort of "spring cleaning," and I got it down to less than 40GB, but my computer doesn't seem to agree with itself on that. If I look at ...
1
vote
2answers
812 views

Disk Utility Disk Verification

I ran the "Verify Disk" tool in disk utility on my main disk called Macintosh HD, and it came up with this log: Verifying volume “Macintosh HD” Checking storage systemChecking volume. disk0s2: Scan ...
18
votes
3answers
46k views

How to resolve error: “Couldn't modify partition map because file system verification failed”?

I upgraded to Lion and decided I no longer want 100 GB of my drive devoted to Boot Camp, I never boot into Windows, I just use it as a VM anyways. So I deleted the boot camp partition using disk ...
3
votes
1answer
464 views

Erasing partition doesn't give me free diskspace

I'm using a Macbook Air and until today I had two partitions on it (not counting the restore partition). I had my OSX partition and an Ubuntu partition. As I don't use Ubuntu anymore, I decided to ...
4
votes
1answer
2k views

Can I partition an iPod (nano, classic, shuffle) for use as a flash drive?

I have made an iPod nano appear as a flash drive by going to iTunes and checking "Enable disk use." However, I am short of a large enough USB key to hold a bootable Windows 8 installer for use by Boot ...