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

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How to throttle performance of a VHD (Virtual Hard Disk )

I'd like to be able to throttle the performance of Reads/Writes on some of my disks. While I know it might be pretty difficult to control that on actual Physical disks, is there any tool which can ...
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2answers
120 views

Partitioning issue after HDD to SSD sector copy and swap in Mac OS X 10.10 (Yosemite)

Recently decided to replace my nearly full 500GB hard disk drive with a 1TB SSD to breathe some new life into my mid-2010 MacBook Pro. I used a “toaster”-style drive cloner (Dyconn Dubbler) to do a ...
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1answer
22 views

How to merge a spanned volume?

I have ended up with my D Volume spanned over multiple partitions (On one physical drive) How do I merge them? (They are adjacent). Or how can I safely get my data off some of the partitions (So I ...
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68 views

diskutil rename error: “does not appear to be a valid volume name for its file system”

I'm trying to rename the volume name of a mounted ISO image using the command: diskutil rename /dev/disk15 TEST_DISK_2014_RENAMED I get the error: TEST_DISK_2014_RENAMED does not appear to be a ...
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1answer
74 views

Unlocking FileVault encrypted drive from Terminal (to allow pasting password)

I have a long, complicated password for an external drive encrypted with FileVault that I have securely stored, but OS X doesn’t allow pasting into the password unlock GUI dialog (argh!). How can I ...
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1answer
114 views

Cant boot MacBook Pro - HDD File System is Read-Only

I have a big problem - I think. The problem seems to be that my HDD is Read-Only so I cant boot and can not erase the HDD to reinstall the system. But here is the whole story. I bougth a used ...
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27 views

How to calculate size of a VERY large folder over FTP?

I have FTP access to a web-server which has a large folder (By large I mean ~200GB). How can I get number of files and it's exact size? I have tried 'du -hs' but it takes a life to receive a response ...
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16 views

Laptop Harddisk not working

I have a segate hard disk (Laptop HD). Which stopped working unexpectedly. I just Google'd and tried few thinks to get it to work. But nothing seems to be happening. I tried connecting the HD to my ...
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29 views

Write back partition being resized

I have problem with my mac it don,t boot. After some research i find out that it mark partition as crashed and want to check it. But while checking it say invalid sibling link and can't repair because ...
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2answers
240 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 ...
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23 views

Backup from HD Image (Mac)

I am trying to recover a system from a dmg. I copied the dmg onto my Documents folder and select the correct drive as shown: I did this by 1. dragged and dropped `MacIntosh HD` onto the ...
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19 views

Copy image/disk/partition, not necessarily entirely and with compression for image

As my last question was considerated "off-topic", here it is reformulated : I have a 16GB SDCard but I put 4GB image on it and I want to be able to extract&store compressed only the 4GB image ...
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1answer
19 views

Perform trim-like operation on a normal HDD?

Is there a way to perform the same thing on a HDD as Trim does on a SSD. I assume the used sectors should be rewritten with 0 or 1.
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1answer
3k views

Unable to create disk image using disk utility (Input/output error)

I want to create a disk image of source 100.03 GB Ext Hard Disk Media on destination 5TB Lacie ST5000DX000-1H2170 there is greater than 1TB remaining on the destination disk. The Disk Utility progress ...
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2answers
128 views

Use free space on a Mac (with a SSD)

I have a MacBook Air with a 128GB SSD, I installed Yosemite on a second partition then removed it and now I have that: 50GB of free space and I can't find how to give it to Macintosh HD (the ...
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1answer
41 views

usb hard disk can be read by device manager not be read by disk manager?

Today when i format my usb hard disk ,the power is off ,when power is on again ,i reboot my pc ,something wrong with my usb hard disk. The usb hard disk can be seen in Device Manager ,but can not be ...
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1answer
83 views

OSX partition smaller than 16 GB

I'm trying to create a new partition because I need a case-sensitive filesystem for web development. But the Disk Utility won't allow me to create one smaller than 16.84 GB. What am I doing wrong?
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179 views

Remove hidden content from EMTEC 16GB flash drive

I purchased an inexpensive EMTEC 16GB USB flash drive with the intent to using it for a myriad of purposes (initially, as a start-up to install Windows via Bootcamp) and have been unable to remove the ...
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185 views

AppleScript shows “Document could not be opened. You don’t have permission.” but file can be opened?

I am getting a "The document [filename] could not be opened. You don't have permission" when attempting to access several files in an AppleScript. However, I can open these files manually without ...
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203 views

Mount Core Storage partitions on image of hard drive created with ddrescue

How do I mount a whole-disk image with an encrypted CoreStorage partition? Update: I found the answer! It was super-simple: hdiutil attach -nomount somePath.img The "nomount" flag is critical ...
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600 views

Why would re-formatting an external disk drive stop random drive disconnects in OSX Mavericks?

My old MacBook Pro Retina was over heating, so after a long story omitted, I got a new MBP Retina with Mavericks pre-installed, and my Seagate Thunderbolt(TB)/USB3 drive started unmounting and ...
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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. ...
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2answers
831 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 ...
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1answer
2k views

zpool: pool I/O is currently suspended

I'm using ZFS on OSX and I've zpool which is active and online: NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT WD_1TB 931G 280G 651G 30% 1.00x ONLINE - but I can't ...
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1answer
161 views

unrecoverable root partition when used as a second hard drive

What I did with my Macbook, I removed DVD driver ant mounted my old macbook hard drive there. BTW, my old disk was split into 2 partitions: root and data. root partition is where system files and my ...
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300 views

How to make bigger Macintosh HD partition

I installed OS X Mavericks Server as a virtual machine to ESX. I'm doing some testing and now I need more space. Macintosh HD partition is 50 GB and I have expand it to 100 GB total in ESX but I need ...
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1answer
1k views

Delete EFI Partition

I run diskutil list and have this schema: /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk1 ...
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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 ...
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1answer
5k views

Unable to delete or re-partition internal drive using Disk Utility

When using Disk Utility, after booting onto the recovery partition, I can't... Re-partition Delete partitions Repair partitions
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1answer
36 views

Restoring mac to pre OS install attempt

I recently tried to install the new OS X maverick, but about 4 min into the process it told me my disk needed to be repaired. That I should back up my stuff and restore the drive. I will do that, but ...
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1answer
96 views

Retina MBP won't recognize Archboot flash drive

I'm trying to install Arch on a flash drive. To do so, I'm trying to first get a bootable, "live" version of Arch on the flash drive I'm going to install it on later. I've followed the instructions ...
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2answers
3k views

Mac OS not allowing for disk partition

I tried adding a disk partition through Disk Utility on a Retina MBP under OS X 10.8.4. It was supposed to be a small, ~20 GB ExFAT partition on a 512 GB disk. For some reason, my disk was ...
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65 views

Disk Utility not finding disk

I have an external drive that was dropped. It doesn't mount anymore on my OS X box and Disk Utility doesn't see it. Is this the point where I'd need to bring it somewhere for expensive data recover?
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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 ...
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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 ...
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2answers
358 views

palimpsest not opening the disk management

I am using Ubuntu. I found from web search that to open Disk management below command is needed: sudo palimpsest But when I am trying it in the terminal and result was : command not found. I also ...
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4answers
487 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?
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226 views

Not enough disk space when doing a SOAP request on mac osx

I'm on Mac osx, I'm sending a SOAP request and the response is: There is not enough space on the disk. <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Body> ...
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2answers
241 views

is there a remote version of KDirStat

I love KDirStat (or equivalent) but I would like to be able to run it on remote host (which doesn't have X11 installed). Is there anything avaible (and free) which will allow me to get a treemap of ...
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2answers
8k views

I want to reformat my external hard disk but disk utility said it could not be unmounted

Hi I wanted to reformat my HP 500GB hard disk to MS DOS (FAT) by using Disk Utility but Disk Utility kept saying that the hard disk cannot be unmounted. I tried googling it but nothing seems to answer ...
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218 views

Cannot run diskutil, sudo or not

I cannot run diskutil on my brand new Retina Macbook Pro 2012. When I try to run it, (including sudo), the terminal says "command not found". I looked in usr/bin and usr/sbin and could not find ...
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250 views

Frequent Mac lockups due to fsck_hfs

My Macbook Pro (10.6.8) locks up every day at noon for several minutes (and often after sleep). I put 'Activity Monitor' up front right before noon sorted by %CPU, and saw that it ran 'fsck_hfs'. ...
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1answer
145 views

Use sparse image bundle instead of split and concat

Is it possible to use sparse image bundles on the Mac in the same fashion as I would use files splitted with Terminals split command? If I show the package contents of the sparse image bundle in the ...
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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 ...
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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 ...
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23 views

How to back up “The disk has S.M.A.R.T. errors” and fix the errors [duplicate]

Possible Duplicate: Repair or recover drive from Mac OSX recovery mode My computer won't start up past the login screen so first i tried Safe Mode [Shift+Start up] didn't work . Then I ...
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484 views

Recover from botched full disk encryption using FileVault2

I decided to enable full disk encryption using FileVault2 in OSX Mountain Lion, but near the end of the encryption process, I get a message telling me that it failed, and that I should disable and ...
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1answer
321 views

Verifying permissions on OSX

Last week i was having trouble installing homebrew onto a new mac running mountain lion, i tried adding command line tools for xcode and installing X11 aswell as following a load of other things i ...
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211 views

System Does Not Boot From Various Bootable Recovery Disks

No matter what recovery system I have used, be it Acronis recovery disk or some other recovery disk that is intended for emergency system restoration, my system just stalls but still responds ...
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2answers
178 views

Safe and fast way to move a partition to begining of disk?

How can I move a partition to beginning of the disk in a fast and safe way?