A hard drive is a device for permanent or long-term storage in computers.

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Accidentally used dd on my system drive

As is wanted to write an image to usb stick, I accidentally used my system drive (macintosh hd) as target. Command used: sudo dd if=/dev/zero of=/dev/rdisk1 bs=1024 count=1 Where disk1 was ...
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25 views

Are repeated FileVault-related harddrive problems a signal that I have greater hard drive problems?

I found a great answer in the forums for an incorrect block count/invalid free block count problem that Disk Utility diagnosed when logged in but couldn't see in Recovery HD mode. Turning off ...
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1answer
34 views

Ghost folders in /Volumes

I've had a problem today where when I plug my external HDD in, it creates a ghost folder in /Volumes with the same name, causing my hard drive to change it's path to /Volumes/HDD 1. This is messing ...
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1answer
38 views

Impossible deactivate the disk

Some time ago I split the hard drive (500gb) in two partitions (250 each), now I have first successfully erased one partition but I still have the second one (Mac HD 2, which runs Mavericks) but I can ...
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1answer
50 views

Macbook SSD Formatting Problem

I just got my Macbook here, and I got a USB with Yosemite 10.10. I opened up the Macbook, took out the old one, and put the SSD inside. My SSD fits perfectly (Samsung SSD 850 EVO 250GB). Then I ...
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3answers
50 views

Moving Macbook Snow Leopard drive to a Macbook Pro that had Yosemite installed: kernel panic!

My wife has a mid 2006 macbook that has been upgraded to snow leopard. I have a mid 2008 macbook pro that has been upgraded to Yosemite. I now want to give my macbook pro to my wife, and thought I ...
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1answer
43 views

How to Recover a gone OSX (mavericks) on MacBookPro?

I shutdown my computer for some reasons with power button (cold shutdown). Unfortunately, my OS i.e.,mavericksis gone at the moment and I have no backup from the Data and settings of that Hard drive ...
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1answer
46 views

Mac Mini 2014 hard drives

Do the Mini 2014 mechanical hard-drive versions have an M.2 ssd slot on their mainboard? EDIT: Let me clarify: the fusion version have a M.2 SSD on the mainboard slot and a 2.5" mechanical drive. ...
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44 views

Lost 32GB on my Macintosh HD

I created a 32 GB partition on my Mac where I installed Ubuntu, then I've deleted the partition from disk utility having errors, I restarted my mac and now I can't see the 32 GB space anymore. As you ...
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1answer
26 views

Option/speed Q's about best configs to upgrade early 2008 Mac Pro 8-core to SSD

I'm a first-timer on here. I too have an early 2008 MacPro 8-core 2.8ghz with 16gbRam and stock Radeon 2600 Vcard. It's fairly well configured, but I'm sure that can improve response for a reasonable ...
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29 views

Partitioning a Hard Drive using “Logical Core Volume Group”

I have a series of scripts I use for repartitioning hard drives before a DeployStudio reimage. They're really simple: #!/bin/sh diskutil partitionDisk /dev/disk0 GPT JHFS+ Mac\ OS\ 10.10 100g JHFS+ ...
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1answer
56 views

iMac won't boot to internal drive, usb sticks - Apple hardware test extended fine

My iMac is being very odd. It won't boot using the internal hard drive. It chimes, starts the Yosemite progress bar and then changes and looks as if it is about to show me the login screen but then it ...
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2answers
50 views

Change drive “block size” to 4096

I just bought a 4tb hard drive and enclosure and attempted to encrypt it with truecrypt. I errored with a message saying the block size must be 4096 bytes for >2TB drive. How do i alter the drive to ...
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1answer
39 views

Can I backup a Time Capsule to a HDD drive connected to its USB port?

I have a 2TB Time Capsule and multiple external HDDs. I recently bought a 4TB external drive, now I'd like all my files, in all my HDDs to go to the 4TB drive that is connected through USB to the ...
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0answers
15 views

Impossible to join free space on main Machintosh HD [duplicate]

I've removed Windows deleting the partition because from BootCamp Assistant it gave me error that couldn't partition the disk. The problem is that now I have 100 GB of free space (which are from the ...
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0answers
11 views

Kernel Panics on MBP mid-2010 with a Seagate Hybrid Hard Drive [duplicate]

I have a mid 2010 MBP 15-inch and I recently replaced the Apple manufacturer hard drive with a 1TB Seagate hybrid hard drive and I am running Yosemite. My MBP crashes randomly when I'm playing League ...
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27 views

Installed rEFInd Boot Manager, it seems HD re-ogranized

Before I installed rEFInd, I believe there were three partitions to my Mac, disk0, disk1, disk2. Now, when I run in the Command line diskutil list This is what remains: /dev/disk0 #: ...
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1answer
78 views

Making a full image of an installed system

I'd like to know if is possible to make a full, bootable, and restorable image of an entire Yosemite installed system, (that is, with all installed apps and settings) without using a commercial ...
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1answer
199 views

Enable writing to NTFS harddrive with non-standard name on Mac

I have a lot of NTFS hard drives back when I used a Windows PC. I'm trying to write to these drives with my Macbook Pro on OSX Yosemite 10.10.2. I'm going through this tutorial. I have to write this ...
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0answers
232 views

APPLE SSD SM0512F Media Equivalent

My Mac Pro (Late 2013) uses an APPLE SSD SM0512F Media SSD; I'd like to buy an equivalent SSD to use externally for cloning, backups, etc. I noticed on the PassMark website it shows performance ...
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15 views

External HDD is mounted, but files are (suddenly) invisible

Being fed up not being able to write to my external HDD (which is ntfs) I decided to use this script. I checked the script beforehand (I am a ruby developer with some, but limited knowlegde of bash ...
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31 views

Unknown Disk Space, can't touch it [duplicate]

My visible Disk Usage minus free space is out by 123GB. Clarification: Externally booted disk repair show no errors. Permissions have been fixed. Time Machine has had local off with: sudo tmutil ...
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24 views

Mac Mini HDD noises and internal HDD Standby

I have a default Mac mini 2.8GHz 2014 with Fusion Drive. My problem is that the mac makes a few noises. Because it is my home server and guest are sleeping in that room these noises are annoying. I ...
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2answers
38 views

How do I mirror my hard drive?

How do I mirror my hard drive? I want to preserve programs for which I've lost the license number.
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24 views

Ipod classic freezes after library is half loaded - restore, new hard drive and Disk U don't work

My elderly 160gb ipod has a problem loading more than about 21,000 songs on to it. The loading from my Itunes from a late 2012 Mac is uneventful and everything looks fine and the Itunes goes through ...
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33 views

High CPU usage during disk operations

Early 2009 17" MacBookPro (MacBookPro5,2) 2.66 GHz Intel Core 2 Duo OS X Yosemite 10.10.3 240 GB OWC Mercury SSD, installed in 2010 I've had issues with high CPU usage for a while now. The original ...
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1answer
161 views

NTFS support for Mac

I am long time windows user with who just started using Mac. All my external drives(1 & 2tb 2.5 portable drive ) are formatted in NTFS. But I found that my mac cannot read or write on that. So, ...
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1answer
114 views

New “EFI boot” drive appearing after reverting OS X drive to HFS+

Months ago I performed a clean install of Yosemite, and as you can read elsewhere, drive was formatted as Core Storage. Later on I partitioned and put on Windows 8.1 through Bootcamp. Worked well for ...
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1answer
95 views

My MacBook won't recognize my external hard drive (Passport - that I use to back up the Mac!)

I'm not techie at all. But I manage the basics. I've always backed up my MacBook (2009) on a Passport. I just plug it in while the Mac is connected to power source & click the icon & it ...
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1answer
34 views

One of my start-up drives is missing

I have a Mac Pro (Early 2009) in which I am running two OS's. 10.10 on a Mercury Accelsior SSD and Snow Leopard on a conventional drive. Before upgrading the SSD from Mavericks to Yosemite all was ...
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37 views

Lost partition on WD 1.5 TB external drive

My 1.5 TB WD drive failed out of nowhere and now it shows up saying "The disk you inserted was not readable by this computer" This is how it shows up on Disk Utility This is what sudo gpt show ...
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2answers
56 views

Terminal command to arrange all files/folders by name on hard drive

Looking to tidy up my iMac. Like everyone, I have lots of files/folders on my iMac. When they get dragged and dropped, or moved around, they retain their position, and the only way to fix this is to ...
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1answer
53 views

Stop sign when booting from internal ssd, boot goes fine if the ssd is in external case

sorry for the long post and my english. I have an early 2011 Macbook Pro 13 which I purchased in july 2011 and it worked fine until one week ago. Since when I bought it i replaced the stock hdd with ...
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44 views

Unknown disk found using diskutil, cannot delete

Using the command line, I wanted to see all available drives on my machine. So, I type diskutil list and besides Recovery HD and Macintosh HD, I notice this: /dev/disk3 #: ...
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128 views

Why can't I mount a Samsung SSD 850 EVO?

I just bought a Samsung ATA III SSD drive, the Samsung 850 EVO. I installed it in an external enclosure that I know works with an ATA II drive, but I don't see the new drive in Disk Utility. ...
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48 views

Disk Utility won't let me create new partitions?

I had a 500gb HDD installed in my Mac running OS X 10.9.5 Mavericks. Being an older drive it started to have some issues, so yesterday I went out and purchased a new 1TB hard drive to replace the ...
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2answers
45 views

Is disk image encryption slower than partition encryption?

I am considering two options to encrypt some data: add a new encrypted partition add an encrypted disk image Which option is faster in terms of disk read/write speed? I suspect that an encrypted ...
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1answer
44 views

Save data from broken Macbook Pro HDD

I have a broken Macbook Pro HDD with two partitions on it: OS X and Bootcamp. I need to take some files from both partitions: the HDD is now mounted to another PC via. SATA adapter Windows sees the ...
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1answer
62 views

Fixing a broken hard drive's partition map

I have a drive that is corrupted. Disk utility could not repair the disk, so I attempted to follow some tutorials and repair the partitions using pdisk and testdisk, but things have gone south. Now ...
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21 views

Backing up data to an NTFS drive

I have a 2TB external hard drive that is about half full of various photos and other things that I use it to hold. Now, I'd like to backup my MacBook Air to it, as I have no more room on my computer. ...
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1answer
34 views

Fast external startup-disk for Macbook Air: SSD1 or Thunderbolt?

I bought a MacBook Air 13.3″ i7 8 GB RAM 128 GB SSD (early 2014) some months ago and found out that the 128 GB are definitely not enough! To somehow rectify my problem I though of buying a fast ...
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32 views

How can i delete a partition in Terminal when I can't simply combine because 'The given partitions are not on the same whole disk'?

Before I partitioned my HD, the only one I had was "Macintosh HD". The partition created one called "Macintosh HD2" I used terminal to erase "Macintosh HD2" somehow, but it returned as "Untitled." ...
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1answer
37 views

Maximum size drive for Mac OS X

4 TB = 1.8 TB ? What is the maximum size drive that can be used with various versions of Mac OS X? On a white Intel MacBook running Mac OS X 10.6.x, the Disk Utility app recognizes a new Seagate 4 ...
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25 views

How to backup, restore and erase OS X GPT using dd under Linux?

How does one backup, restore and erase OS X GPT using dd under Linux like it's shown in Archlinux Wiki using the MBR analogue: To backup the MBR: # dd if=/dev/sda of=/path/mbr-backup bs=512 count=1 ...
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120 views

840 EVO performance restoration

I got a Samsung 840 EVO mounted in a Mini late 2012. Now, this is the SSD affected by the notorious performance degradation problem. Searching samsung site, I was able to find an upgraded firmware ...
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1answer
41 views

Error with Android usb. Working Macintosh HD not repairable. Alternatives to backup?

I have to say first, I have almost zero experience is the use of Terminal, an usually I'm very careful with what command I use. I have tryed to create a bootable Android x86 usb and it was a success, ...
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49 views

Upgrading SSD and RAM has horrible side effects

upgrade a MBP 13inch ram and hdd to ssd Upgraded using carbon copy cloner. Constant beach balling Takes 40 seconds of white screen to get to the apple boot screen Network just doesn't work. It ...
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1answer
157 views

Deleting a hard drive protected by password with Mac OS X Yosemite

I recently changed my hard drive for a SSD device. The removed storage device can be used as an external drive, via USB. I want to delete everything on this HD, but it is asking me for a password when ...
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0answers
60 views

How to use Time Machine backup when hard drive is broken?

I have a MacBook Pro which I use Time Machine to back up usually weekly. Its hard drive broke recently. I got an exactly same hard drive and installed it into the laptop. How do I restore the ...
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1answer
94 views

Where is my disk space going?

My available disk space seems to «vanish» magically. OmniDiskSweeper tells me that 69.5 GB data is on my hard drive, but how come Finder and Terminal (and OmniDiskSweeper's drive list itself) tell me ...