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

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4answers
6k views

How to install Mountain Lion on a disk that cannot be formatted in recovery mode?

I'm trying to do a clean install of Mountain Lion but I'm not being able to format my partition. I previously had Lion, encrypted the disk, then upgraded to Mountain Lion, then booted into recovery ...
1
vote
1answer
494 views

Files in ISO DIsappear When Mounted

Some time ago I downloaded a QuickLook plugin that allowed me to look at the files in an ISO called Suspicious Package. I used this to inspect the contents of an ISO and it displayed this: And ...
2
votes
1answer
552 views

Data recovery on Lion with a disk that disk utilities cannot mount?

I ran iDefrag last night because my MBP was running sooooo slow. I barely ever use it and it has 300 GB of free space. I used to use OnyX to optimise the disks on Snow Leopard but I didn't see that ...
0
votes
2answers
1k views

Disk Utility says disk is corrupt after running fsck -fy

Disk utility reports that the disk needs to be repaired. I can't find the original boot disk, so I booted to single user mode and ran: fsck -fy This reported that it fixed a problem, and that the ...
2
votes
1answer
3k views

What does “DOE compliant” mean in Disk Utility?

When erasing a drive with Disk Utility, you have a couple options. An insecure wipe, a single pass of zeroes, a "DOE-compliant" 3 pass, and a DOD (Department of Defense) 7 pass. DOE doesn't stand ...
5
votes
1answer
619 views

Presence of a Linux partition causes FileVault2 setup to fail

I'm currently dual booting Mountain Lion and Ubuntu 12.04 on a rMBP. Everything works fine, but enabling FileVault fails with the error message: "Some information was unavailable during an internal ...
1
vote
1answer
903 views

FAT16 disk refuses to mount in Mountain Lion

I've recently resumed a small OS-from-scratch-in-Assembly project I started several months ago in Lion. Part of the project involves compiling a binary file with NASM (the one that is pre-included), ...
3
votes
1answer
981 views

Is FileVault distinct from Finder's “Encrypt …” command?

I'm confused by the variety of methods for encrypting drives in Mountain Lion. There are at least four methods, FileVault in System Preferences; Finder's "Encrypt..." command; Disk Utility's "Erase" ...
2
votes
1answer
8k views

For a startup volume encrypted with Core Storage, System Preferences show that FileVault is disabled

My iMac has a SSD and a HDD. The OS is installed on the SSD. I performed a clean installation of Mountain Lion to the SSD, and cloned my SSD using a backup from my Time Capsule in OS X Recovery. ...
0
votes
1answer
868 views

What causes me to be unable to burn Windows 7 ISO due to a medium error?

I've just upgraded my 2011 17" MacBook Pro with a brand spankin' new SSD hard drive and 8GB of RAM. In order to fully maximize the potential of the system, I'd like to install Windows 7 to take full ...
2
votes
2answers
2k views

Can't see new SSD when connected via internal SATA port

I just bought a new Samsung SSD 830 and installed it my 13" MacBook Pro (Mid 2010) in the hard disk bay, replacing the drive that was there (I actually have a second drive in the optical drive's ...
1
vote
1answer
2k views

How to create a disk image from the command line

Currently part of my build process is as follows; Start Utilities/Disk Utility Select New Image Set Save As to widget Set Name to widget Set Size to custom size 50 mb Set Format Mac OS Extended ...
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vote
0answers
481 views

“Invalid key length” - corrupt partition after power outage?

I recently lost power overnight with my computer up and running, external hard drives plugged in, and in the morning my login screen had the "Device Removal" error as if I unplugged the disk without ...
1
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0answers
2k views

Disk Utility Error Message - Missing EFI + MediaKit

Previously setup was with 2 partitions, one for normal use while the other had the Lion Install ESD on it, used when I installed some time ago. The other day my machine suddenly shutdown and when I ...
1
vote
2answers
1k views

Mac: how to securely delete an SD card?

Nothing I have tried gives me read/WRITE access to my SD card from my Canon camera. How can I secure-delete before selling the card on eBay? (the lock switch is on: unlocked - tried the other position ...
0
votes
1answer
2k views

Partition MacBook Pro with Mac OS X Lion using Disk Utility

I've just bought a new MacBook Pro with Mac OS X Lion. The problem started when I tried to divide the hard disk into more than 3 partitions, so I erased the existing partition and tried to divide the ...
1
vote
1answer
449 views

How can I use an external HD to boot from in Snow Leopard?

Recently my OS X Snow Leopard has been taking a really long time to boot up. Suspecting that something might be wrong with the HD I did a disk verification using the Disk Utility. It showed me an ...
1
vote
1answer
2k views

How to move boot and recovery partition from HDD to SSD

Today an Apple Certified Macintosh Technician has installed an SSD into my iMac medio 2011. The iMac was born with an 1TB HDD but now a Crucial M4 SSD is also installed inside the mac. I've moved my ...
0
votes
1answer
170 views

Filesystem check on startup

as Mac OS X in part is an *nix operating system. Will the filesystem of my computer be checked periodically? How to check when the next check will be triggered, if it is checked periodically? My ...
2
votes
2answers
6k views

Clone the Windows partition with Carbon Copy Cloner?

I have bought a new Hard Drive and I want to switch from my old disk to my new one. Time machine will do the job for my Mac partition, but not the Windows partition I guess. So I'm looking for way to ...
0
votes
0answers
850 views

How to “scan disk” or “repair disk” by booting up in single user mode and scan disk?

I think when we are using the Mac, we can't choose "Repair Disk" in Disk Utilty to repair the current hard drive, as the drive is being used. If "Verify Disk" is used, it only takes about 3 to 5 ...
3
votes
1answer
1k views

Repairing Time Machine volume taking forever

Over 18 hours and counting, currently in the "Checking multi-linked directories" phase, but it's been there all night long. I see disk I/O, not a lot, but some. I assume its from the TM drive as the ...
4
votes
3answers
2k views

How to create a bootable USB drive for Disk Utility?

Disk Utility says my boot drive need repair. Unfortunately my DVD drive is toast, so I can't boot from the install DVD and make the repair. Is there a way I can create a bootable USB drive and ...
5
votes
1answer
6k views

Disk Utility says: “Error: This disk doesn't contain an EFI system partition.”

After a clean install of Lion, followed by partitioning which again was followed by a installation of Ubuntu, I noticed some error messages of Disk Utitity. When verifying the volume I get told that ...
1
vote
1answer
957 views

Repair disk on Snow Leopard using a bootable USB, in order to upgrade to Lion

[Mid-2010 MacBook Pro running the latest version of Snow Leopard] I read in many places that you should always do a "Verify Disk" in Disk Utility and resolve any errors before upgrading to Lion. I ...
0
votes
1answer
2k views

Can't restore image to USB stick

When I try to restore, I get message: Could not validate source - Operation not supported haven't seen anything like this on the web
2
votes
5answers
835 views

How can I install OS X Lion on a new HDD?

I need OS X Lion on a new HDD that I am preparing to install in a MacBook. Since I don't have an existing disk to boot up and Apple isn't selling flash drives with it (or are they?), how do I use it ...
3
votes
4answers
39k views

How can I fix an Install Failed error while installing Lion?

I downloaded the new OS X Lion from the App store. I am running the latest Snow Leopard on my 2010 15" Macbook Pro. During the download, it somehow stopped while I was away from the keyboard. When I ...
3
votes
1answer
591 views

How do I move Mac and Windows partitions to single Hard Drive?

I have this scenario: 600 GB Hard Drive, using Master Boot Record 300 GB Windows 7 x64 Parition, NTFS 300 GB free Space 1 TB Hard Drive, Guid Parition Table 730 GB Data Partition, exFat Two More ...
1
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1answer
1k views

Ejecting USB drive via AppleScript does not make drive power down

On startup, I eject my external USB disks with the following AppleScript: try do shell script "diskutil eject \"/Volumes/USB Backup\"" end try This works as expected: the drive powers down. ...
0
votes
2answers
2k views

Can I repair my system disk (10.6) by booting off a 10.5 install CD?

I'm running Snow Leopard (10.6) and OnyX told me I need to boot from my install CD and use Disk Utility to repair my drive. (It wasn't any more specific as to what the actual problem was.) I can't ...
1
vote
0answers
157 views

Find Time Capsule HD Specs

How can I find out the specs from my Time Capsule hard drive? It doesn't appear in Disk Utility (a mounted disk). More specifically, I'd like to know the manufacturer and model, much like the System ...
2
votes
2answers
4k views

Disk diagnostic and repair utility for Mac that works with all kinds of storage devices?

There are some nice and useful utilities for testing disks for bad blocks like MHDD, Victoria, HITACHI Drive Feature Tool etc. But these utilities have some limitations. For example, MHDD is the best ...
4
votes
2answers
3k views

Optimal method to test an external hard drive?

I've got an HFS+ formatted external drive that is starting to act a bit funny, mainly causing my mac mini (finder) to freeze up on occassion when accessing it. Fearing imminent failure, what is the ...
2
votes
3answers
3k views

How do I merge System partition with another HFS+ partition without data loss?

My hard drive is split in three visible partitions: System, Data and Backup. I'd like to merge System (OS X Lion) and Data into one partition without data loss. Disk Utility won't let me resize the ...
0
votes
3answers
765 views

Time Machine sparsebundle corrupted on disconnect

I've been using Time Machine over wifi and have had a recurring problem with corrupted sparsebundles. The scenario is a relatively new Airport Extreme, a MacBook with Leopard, and a partitioned ...
4
votes
2answers
410 views

How to checksum for a DVD under Panther?

I'm helping a friend checking if a DVD was burned properly but he's saying that under Panther there's no Images menu in Disk Utility.
1
vote
2answers
327 views

What's the tool that can do some actions when a file is copied?

I use Cmd+L to make a alias, and the alias has "alia" appended to the original file name. I move the link to a directory, then remove the "alias" part manually. Is there a tool that can do this kind ...
9
votes
1answer
400 views

I know how to repair disk permissions. But… Who broke them?

One of the common Mac troubleshooting steps everyone always seems encouraged to try first is to "repair disk permissions" in Disk Utility. This process usually finds random odd problems, fixes them, ...
0
votes
1answer
439 views

Extract a disk image without diskimagemounter

I have an account on a school system where they won't allow us to mount virtual images. I can run arbitrary programs as a user, though not as root. I've tried mounting it from the command line using ...
4
votes
2answers
4k views

What are “dmgpart” files and what tools can create, merge, or manage them?

I downloaded something that came as three large files: One was a *.dmg (a disk image file, which I expected) and two more were *.dmgpart files, which I haven't happened to see before – I never ...
3
votes
2answers
5k views

Format SD card with FAT and custom file allocation unit size

I'm using Maverick (a offline mapping application) on my Android device which has thousands of files in the tile cache with a size of 168 byte. The SD card is formatted with a file allocation unit ...
1
vote
1answer
3k views

Why is my boot partition listed as Unmounted in Disk Utility?

I recently experienced a kernel panic ("your mac must restart...") due to an issue with Macfusion, so after the reboot I loaded Disk Utility in an attempt to verify the disk in case something was left ...
1
vote
1answer
465 views

Recover files from one volume to another on the same Drobo?

One evening we had a momentary power outage, causing sudden shutdown for my Mac mini and the attached Drobo (4 bay). When the system came back up, only one of the two volumes mounted on the desktop. ...
4
votes
2answers
11k views

Deleting a partition in Disk Utility fails. (Error: -69879)

This is the output in Disk Utility: Disk Utility cannot modify this disk because it contains CoreStorage physical volumes. Use command line distil instead. The selected partition won't be ...
1
vote
1answer
2k views

What is the blue section of a partition in Disk Utility?

What is the blue section at the top of this image (above Macintosh hard drive partition)? Is it another partition, it only seems to exist on this partition when I create a new one. Where do I find the ...
0
votes
2answers
348 views

Checking number of reallocated sectors of HDD through Disk Utility, Mac OS X

My MacBook was purchased in 2008. Yesterday I checked the number of reallocated sectors of the hard drive using Disk Utility. It showed there were no reallocated sectors. That seems strange since I ...
7
votes
2answers
688 views

Move complete Lion installation to another physical drive

is there a way to completely move my OSX Lion to my new SSD without reinstalling? I came from Windows and Linux to OSX and i thought maybe it is possible to simply change the bootloader config after ...
3
votes
2answers
2k views

Disk utility in command line

I'm looking for the CLI equivalent of "Check disk" and "repair disk" in Disk Utility. I think fsck is involved but I don't know with which options, and if it's the only program run.
0
votes
1answer
940 views

Solving a problem on a MacBook Pro 5,1 with an OCZ Agility 3 SSD

I installed Mac OS X lion on an SSD (through USB) after checking the firmware was the latest version (2.15). When I transferred the SSD into the MacBook Pro (like i usually do after an install) but it ...