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

learn more… | top users | synonyms

1
vote
2answers
361 views

Backing up HDD to restore it on another SSD

I want to switch out my current HDD for a SSD in my Mac. However I don't want to reinstall the OS and all my software. How can I backup (image) the entire HDD to restore it later as image with Disk ...
6
votes
2answers
1k views

What terminal command or program can list an SSD's Power On Hours?

I'm looking to script using the unix shell the retrieval of SSD (and HDD) data that disk utility shows in the information window. I'm immediately interested in the Power On Hours and Power Cycle, ...
0
votes
1answer
169 views

How to image and deploy a Bootcamp setup?

We are rolling out iMac's and MacBook Pro's throughout the business and are setting them up with Boot Camp and an option to boot into Windows 7. Essentially the partition is just split down the ...
3
votes
4answers
8k views

How to resize Macintosh HD?

In my disk utilty, I have some unused space left over. I want to resize Macintosh HD to use this space. Whats the best way to resize Macintosh HD? Disk Utility won't let me resize it whether I'm ...
0
votes
2answers
4k views

Erase MacBook hard drive without OSX disc

I would like to erase everything on my Mac's hard drive as I'm going to recycle or sell it. Is there a way to do it without OSX disc?
2
votes
1answer
88 views

Disk Utility: choose disk or volume?

When using disk utility to verify/repair permissions (or verify/repair the disk itself), I've never been clear whether I should perform operations on the disk ("WDC WD1200BEVE-00WZT0" in my case) or ...
5
votes
1answer
1k views

How can I tell which volume the operating system is on?

I'll admit that I am kind of rolling multiple questions in to one here so please forgive me and try not to knock me for it. I am new to Mac but I'm trying to port one of my Java applications to OS X. ...
1
vote
1answer
1k views

Can't I resize my existing partition?

I tried installing Win 7 into my Mac so I can dual boot and use Win 7 but then again changed my mind about it but i have already partitioned a separate drive for windows. I deleted it and tried ...
0
votes
2answers
2k views

Unable to create a partition to install Mac OS X

When I try to install Mac OS X there is no partition for me to choose. I tried to create a partition and got the error, "Partition failed with the error: Couldn't unmount disc." Anyone have a clue? ...
1
vote
1answer
120 views

How can I reconfigure the RAID settings on a Maxtor OneTouch III?

I have a 1TB Maxtor OneTouch III. This is the drive that comes with two 500GB disks and software to configure RAID 0 (mirroring) with 500GB of storage, or full use of both disks for 1TB of storage. ...
2
votes
3answers
2k views

Disk utility can't add partitions

I have two partitions - one with Mac OS, and another with Windows 7 (created by Bootcamp). Now, I want to create two more partitions for Linux - LINUX and LINUXSWAP. I open Disk Utility and specify ...
3
votes
2answers
919 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
3answers
258 views

Completely erased my Leopard machine from another computer, how do I install an OS on it?

I started up my computer in Target Disk Mode and erased it from a friends Mac thinking that I could then install Mountain Lion without installing Snow Leopard. Do I have any way of getting my machine ...
0
votes
1answer
174 views

Disk repair failed after using osx with hibernated windows/bootcamp with macdrive

I forgot I just closed the lid of my MBP the last time I used Windows/Bootcamp (instead of shutting it down) and that triggered hibernation. The next time I powered my MBP on, OS X started ...
1
vote
1answer
683 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
0answers
264 views

Install knoppix on usb with disk utility?

I have downloaded the linux distro knoppix. I have snow leopard and i want to make a bootable usb with the above distro with the disk utility. I put the source to be the iso of the distro and ...
1
vote
0answers
260 views

Why do external hard drives stop working under very specific conditions?

I have a mid 2011 MacBook Pro 15" running Lion. I have seen this behavior across 3 different external hardrives, with varying manufacturers (2x Seagate, 1 Western Digital), different file system ...
1
vote
1answer
368 views

Can Disk Utility and Disk Warrior be used on a Fusion volume containing Mac OS X

I have Snow Leopard Server 10.6.8 running in a VMware Fusion 4.1.3 virtual machine. When I run a Disk Utility "Verify Disk" from within the VM, errors are reported. Invalid B-tree node size ...
1
vote
2answers
5k views

Changing a Volume's “Device / Media Name”

I know a Mac volume can be renamed... obviously. But if you look at the output of diskutil you will see that a volume also has a "device name" that corresponds to the name it was given when it was ...
3
votes
4answers
913 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 ...
1
vote
1answer
788 views

How to clean up partitions after OS X is moved from HD to SSD

Yesterday an Apple Certified Macintosh Technician 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
2k views

i think my harddrive died? did an internet recovery, whats the status of my computer? can't restore from backup until i get home

so for some reason my 2011 MBP died on my way to work this morning? when i got in and booted it up, it froze. i restarted it and got a flashing folder with a question mark on it. what does this mean ...
0
votes
1answer
633 views

Boot Camp / Partitioning Weirdness

I have a MacBook Pro, running 10.8.2. I'd like to give Windows 8 a go, using Boot Camp. Now, I've probably done a b Boot Camp install of Windows close to 10 times, on multiple Macs, but I'm stumped ...
1
vote
1answer
511 views

Time Machine Drive Failure

So, I started up my computer a couple days ago, and OS X reported that my Time Machine Drive had some damage and that I could view files, but not copy anything to the drive. After verifying with disk ...
2
votes
2answers
1k views

Is it safe to enable the hidden disk image formats and debug menu in Disk Utility, and what are its purposes?

I'm primarily interested to know whether installation of Lion included the Recovery System. I understand you can enable extra formats and debugging in Disk Utility, using the following commands: ...
0
votes
2answers
1k views

Can I have an Encrypted Partition in a 2 Partitions USB Stick?

I have a new 16Gb USB key and want to take advantage of Disk Utilities feature to encrypt it, however I do need to move data from Mac to Windows from time to time. Is is it possible to have one FAT ...
0
votes
3answers
316 views

HD scan in Mountain Lion

I suspect a faulty drive. Anything that could perform a hardware scan (bad sectors?) built into Mountain Lion or available for free off the 'net?
0
votes
1answer
399 views

How to enable “Repair disk button”?

Here what happened with me today. TimeMachine asked me whether I want to set a backup disk, I've answered yes, but then, when I've realized that in order to backup anything TimeMachine will clean the ...
1
vote
2answers
3k 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 ...
3
votes
4answers
10k views

SD card is read-only, all Disk Utility options grayed out

I'm using Lion (10.7.3) on a mid-2010 MacBook Pro. I just got a 32GB SD card and formatted it with my camera. I'd like to transfer some files onto it from my computer, but the card seems to be ...
1
vote
4answers
5k 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 ...
3
votes
2answers
28k views

Cannot Unmount Mac OS X Base System Disk

My Mac running Lion was being slow, so I was decided to reinstall OS X. I don't have any Time Machine backups. Everything went file, but in the middle of the installation, it got stuck, and later the ...
3
votes
1answer
1k views

JDiskReport is damaged, can't be opened

I have tried downloading and running JDiskReport 1.4 a few times now, and after unzipping it and clicking on the executable I get the message: "JDiskReport" is damaged and can't be opened. You ...
1
vote
1answer
317 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
376 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 ...
1
vote
1answer
2k 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
541 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
709 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
837 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" ...
4
votes
1answer
5k views

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 ...
2
votes
1answer
6k 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
555 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 ...
1
vote
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 ...
2
votes
2answers
283 views

Exact clone of HD

I managed to broke something on my iMac's internal HD. I have now done a successful restore using DiskDrill, but just in case I want to make an exact copy of the internal HD. Not just some partition, ...
1
vote
1answer
753 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 ...
1
vote
0answers
359 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
vote
0answers
1k 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
689 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 ...