Commonly used to refer to Disk Utility.app, an application included with OS X.

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1answer
11k views

Mac OSX - Why is /dev/rdisk 20 times faster than /dev/disk

According to the rasbery pi documentation, You can load your OS to a flash card with either /dev/disk or /dev/rdisk. rdisk stands for raw disk. /dev/disk is a block level device, why would rdisk ...
14
votes
5answers
29k views

Cannot resize OS X partition

I am trying to resize my existing Mac OS Extended partition on my Macbook to install Windows 7 (using steps similar to these), but when ever I go to apply the changes, I get this error: ...
14
votes
8answers
61k views

Fix bad blocks on Mac hard disk

I have a hard disk that I scanned with TechTool and it reports one bad block. As far as I can tell, TechTool only scans and reports a failure. It doesn't fix anything. Back in the day, Norton Disk ...
11
votes
6answers
42k views

Util to check external USB Drive health? [closed]

I tried a few utils and none of them worked. Either USB wasnt supported or the drive was 'recognized'. I am trying to figure out if i should dump the drive or not. Its only a year old but the warranty ...
10
votes
5answers
21k views

How can I resolve the error “MediaKit reports partition (map) too small”?

I am unable to expand my Mac's hard disk. diskutility reports this error: MediaKit reports partition (map) too small How can I resolve this?
7
votes
3answers
3k views

Why is Disk Utility / diskutil taking so long to zero out data?

I've tried with Disk Utility.app and diskutil at the commandline to zero out a 3TB external USB hard drive, and both work at about 1%/1hr. In Disk Utility.app I am using the 1-pass mode, and with ...
7
votes
1answer
9k views

Create new partition on encrypted volume in OS X Lion

Updated: see below. I encrypted a 500 GB partition on an external 1TB drive on OS X Lion. The other 500 GB was not used yet and I want to create another partition on the external drive now. Disk ...
6
votes
4answers
5k views

Equivalent of badblocks on Windows or DOS

Is there a utility in DOS or Windows that is as thorough as badblocks on Linux?
6
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2answers
18k views

Disk Utility Restore causes “Could not validate resource - Invalid Argument”

I have a problem with Disk Utility on Mac OS X 10.6. I have an image of Windows that I would like to use as a bootable volume on a pen drive or external hard drive. The thing is: When I try to ...
5
votes
4answers
3k views

How is OS X Disk Utility's secure erase mode in comparison to other commerical secure delete methods/apps?

Within OS X, the utility Disk Utility has a secure erase for hard drive formatting. It has 1,7, and 33 pass options, which to my knowledge are very good writting random data to the drive. What does ...
5
votes
5answers
9k views

Hard Drive Bad Sector marking utility [closed]

I already have Windows XP, During installing Ubuntu(dual boot) the disk drive just stuck up at one place and doesn't seem to move ahead.. Is there a disk bad sector mark utility that just marks these ...
5
votes
2answers
2k views

Is it possible to change an encrypted volume's password w/o recreating the volume?

I have a 10G encrypted volume bundle created with Disk Utility. I want to change it's encryption password. How can I do that?
5
votes
2answers
235 views

Are these unrepairable SSD errors indicative of a SSD hardware error?

Some time ago I got an Apple authorised reseller to replace the SSD in my early-2011 model MBP with a Samsung 512GB 840-series disk. About three months later, booting failed with this error: Please ...
5
votes
2answers
6k views

Difference between ISO, MDS & BIN/CUE disk image formats?

What is the difference between these major disk image formats? Are there any specific advantages / disadvantages for any of them?
5
votes
1answer
1k views

What causes Mac OS X Permission errors?

This is out of interest rather then looking for a fix to a problem. What actually causes permissions on Mac OS X Systems to become messed up? Its an easily fixed problem (i.e. there's a quick and ...
4
votes
2answers
17k views

How do you format a 2GB SD card to FAT32? (Preferably with Disk Utility)

I've been looking around for a way to do this for a while, but haven't been able to find the answer. I need to format my 2GB SD card to FAT-32, but I don't see the option in Disk Utility. If I ...
4
votes
3answers
6k views

Truecrypt or default Disk Utility on Mac? [closed]

Windows by default doesn't come with a password protect folder option (other that Win7 ultimate), so I used to swear by Truecrypt which was great. But I've read in a couple of places that Mac OS X by ...
4
votes
2answers
3k views

Shrink a .sparseimage

I have a .sparseimage that occupies 90GB of space on my hard drive despite only having 30GB of files in it. How can I reclaim the empty space used by the .sparseimage and compact the file?
4
votes
1answer
12k views

Is there a way to make Windows 7 install .iso onto USB drive from OSX?

I copied my windows 7 cd to a ISO and trying to source the image onto my USB drive from OSX. So far it doesn't seem like it's possible with disk utility. Is there something else I can do to make this ...
4
votes
1answer
3k views

Where is the Disk Utility log? (Mac OS X)

Apart from what it displays directly, Disk Utility on Mac OS X (10.6, if it matters) keeps a log, visible through Window → Show Log (or ⌘L). This is probably a file on disk, right? Where is this file? ...
4
votes
1answer
3k views

What are “Missing thread recordng” erros when running fsck -fy?

There is some error reported when I run Disk Utility and verify the root volume on my OS X MacBook. So I boot and CMD-S into the shell mode and run /sbin/fsck -fy. Errors are like: ** Checking ...
3
votes
2answers
6k views

Disk Utility Error: Newer Version of Mac OS X needed?

In Snow Leopard's Disk Utility (OS X 10.6.8) what does the error: Partition failed with the error: This operation requires a newer version of Mac OS X for this disk mean? I've never seen it ...
3
votes
6answers
11k views

I forgot my encrypted disk password on OS X

My disk is formatted with Mac OS Extended (Journaled, Encrypted). I have a super long and random password. It won't let me paste my password in and I keep manually typing it wrong. There is nothing on ...
3
votes
1answer
4k views

Which tool should I use to wipe free space on Windows 7 [duplicate]

Possible Duplicate: How to quickly and effectively wipe a Win7 x64 hard drive Which tool should I use to wipe free space on Windows 7? It should be free and preferably open source.
3
votes
1answer
8k views

How to turn off verification after DVD burning on OS X?

I use the built in DVD burner from OS X. Whenever I burn a disk, it is verified after burning. Nice, but I am usually quicker in verifying myself with a bit more human, maybe more error prone ...
3
votes
1answer
6k views

Getting the diskutil command to work in OSX Mavericks Single User mode

I'm currently writing some single user mode maintenance scripts. My current goal is to be able to perform permission repairs and disk formatting using the diskutil command in Single User Mode. ...
3
votes
1answer
9k views

MacBook Air startup disk not found, but verified

I have a MacBook Air that has suddenly stopped booting at all. I booted into recovery mode and see the harddrive fine in Disk Utility. The partition is there as well marked: Mac OS X Base System. I ...
3
votes
1answer
148 views

windows spanned volume fails after sleep (requires restart)

I have a 4TB spanned volume in windows 7 professional 64bit (2TB x2 and a single 1TB). It works great after a boot/reboot, but if I put the computer to sleep, it fails to mount/the spanned volume on ...
2
votes
4answers
545 views

How do I format the whole disk after using my machine?

Is there any light utility that can format the whole disk including OS drive? I need to erase sensitive data after using the machine.
2
votes
3answers
3k views

diskutil command not found in OS X terminal

I am using Mac OS X 10.6.4 and am struggling with the command: diskutil Whenever I type in diskutil the terminal says: -bash: diskutil: command not found Does anyone know what the problem might ...
2
votes
4answers
480 views

Is CHKDSK a warning sign of failing drive?

This morning CHKDSK ran on its own during boot. It scanned 1 out of 3 HDDs in my PC. Is it a warning sign that that particular HDD is about die?
2
votes
4answers
12k views

How do you access the contents of a mounted DMG drive mounted through hdiutil and diskmout

My external USB drive failed. I made a .dmg image file of the drive using disk utility. Later I was not able to mount the .dmg image. I used terminal hdiutil attach -noverify -nomount name.dmg ...
2
votes
4answers
1k views

sdelete alternative on osx

In the sysinternals suite for windows there is this nifty sdelete tool for securely deleting individual files as well as overwriting unallocated disk space with randomness or zeroes ( the -c or -z ...
2
votes
2answers
7k views

Is there a utility to create a multi-Windows bootable USB stick?

After reading this article on the SuperUser blog I set out to create a (primarily) Windows boot/install USB, with hopefully a few utilities on it as well (see my answer here for examples). I've ...
2
votes
3answers
301 views

Copying a software RAID 1 to a normal SATA II disk

I need to copy my software RAID 0 (GA-P55-UD5, intel controller) to a normal SATA II disk. I've tried Clonezilla but it won't recognize my RAID volume; just the single disks that are part of it. How ...
2
votes
1answer
2k views

OS X Boot extremely slow after installing boot camp (XP)

I just installed bootcamp on my 2010 13" MBP, running 10.6. However, after doing the bootcamp, I have extremely slow boot for my OS X partition, and when I verified the disk in Disk Utility (from a ...
2
votes
1answer
280 views

Is Joerg Schilling’s “sdd” a full replacement for “dd”?

I'm trying to use sdd on my Debian system, and can't get one set of options to work. They do work in dd so I am wondering if I am specifying them incorrectly, or if sdd didn't implement them, or ...
2
votes
2answers
3k views

Snow Leopard doesn't repair permissions, despite showing / saying its fixed them?

Sometime ago, I used carbon copy as I was replacing my hard drive in my Mac Mini running Snow Leopard. Afterwards, on my new drive I had some permission problems. I've tried several times running a ...
2
votes
1answer
245 views

Boot utilities for 3 TB hard drives

What hard disk/partitioning/GPT/cloning/etc. utilities are there to have on a bootable USB drive or CD/DVD, that can work with NTFS and other file systems, on hard drives greater than 2.1 TB?
2
votes
1answer
873 views

Mac Disk Utility Undo volume scheme change

My sister made a mistake when trying to reformat a hard drive, and buggered up a hard drive with her work on it. She says it happened very quickly which leads me to believe she's actually just ...
2
votes
2answers
204 views

Flash drive life monitor?

Is there a tool to advise how much wear the drive has seen? (I've just acquired one and don't know it's history.)
2
votes
2answers
840 views

windows 2008, Resize partition

Hello I try to split my hard drive to 3 partition by Windows tools, I have 385 GB free space on C drive but when I try to shrink it , only it allows 25 GB to be shrinked. windows report it is for ...
2
votes
2answers
826 views

Partition corruption, still can see files in single user mode, would like to retrieve files

The problem started after forcing the mac to shutdown. Since then, when trying to boot, it stays stuck at the grey apple with spinning wheel. I've tried a few generic things to be able to access my ...
2
votes
1answer
1k views

What does the Boot Camp Assistant do to my drive that I can't just do with Disk Utility?

What I understand is that Windows 7 will not install on GPT (GUID Partition Table) drives. Of course, all new Macs have their drives partitioned that way, and when you run the boot camp assistant, it ...
2
votes
2answers
106 views

Zerofree never ends. Is it doing anything?

I have been trying to use zerofree to reduce the size of my VM. It worked fine for one filesystem, but the other was mounted on / so it wouldn't let me. Then I figured I could use the 'recovery ...
1
vote
2answers
374 views

Boot/System partition resizer [closed]

Are there any free utilities(like Partition Magic) to resize the boot/system partitions on Windows XP?
1
vote
3answers
886 views

Automated Clonezilla like backups?

I have a laptop with two hard drives; one SSD (64gb) and one HDD (750gb). My SSD contains important files and OS (Windows) files. I would like to store an image of my SSD on my HDD for backup ...
1
vote
3answers
6k views

What can I do when I get a “Cannot Allocate Memory” error after restoring a disk image?

I've downloaded Mac OS X Mountain Lion today and wanted to backup the installation image to a USB drive for later. I've created a new empty partition of at least 8 GB size on the external drive using ...
1
vote
1answer
5k views

Mac OSX Terminal cmd/script to display HDD sectors pending allocation

I've been trying to find a way to get terminal to display results of a SMART status check in the terminal for a recovery drive I use. The cmd diskutil info or diskutil info -plist / only say whether ...
1
vote
1answer
486 views

Warning while using Disk Utility to verify permissions on Snow Leopard

I was using Disk Utility to do a "Verify Permission" and I got the following message: Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent" has ...