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

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Is this external USB3 drive really this slow for my Macbook TimeMachine backup?

I got myself this WD 2TB USB3 external harddrive for backups: http://amzn.to/1X8b3a8 I connected it to the USB 3.0 port of my mid 2015 Macbook Pro 15". When I run Time Machine, it really takes ...
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2answers
117 views

Mac Hard Drive Storage Decreases even without downloading anything

I have a 128 GB hard drive on my macbook pro retina 13". My mac storage hard drive keeps decreasing for no reason, even when I do not download anything. This still happens even when I don't use any ...
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31 views

Can't access External Drive (time machine), no EFI partition system. How to manually rewrite it?

tried to back up my Mac to time machine yesterday but I couldn't mount the drive. I have a Lacie 3TD hdd that is partition into msdos(for transfer between pc and mac) and hfs(time machine). I am able ...
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1answer
263 views

Flashing folder icon appeared once after changing Macbook hard drive

About 2 weeks ago, I updated my late 2011 Macbook Pro hard drive to a Crucial MX100 solid state drive. The drive installation and data migration went fine with no issues, but today I found the ...
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3answers
5k views

Restore Recovery HD partition from Yosemite downgrade

I recently got back to Mavericks from Yosemite, everything went fine. As I normally do, I checked my HDD with the Disk Utility and found some trouble, then I boot on recovery mode to fix my HDD. I ...
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1answer
130 views

Partition type suddenly FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF, drive unmountable

I have two drives inside my MBP, an SSD for the OS and the original HDD for large Data. The HDD has 3 Partitions: My Data (Core Storage volume) 20Gb for Linux 4Gb for Linux Swap Recently I ran ...
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2answers
160 views

iMac 27" late 2012 SSD upgrade

I'm the proud owner of an 27-inch iMac 2012 with high-end configuration, but the 1TB fusion drive keeps being the bottleneck. As my warranty has expired now, I want to upgrade the 128GB SSD to a ...
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3answers
219 views

Recover deleted Encrypted OS X Extended volume

I accidentally formatted an external 1TB HD to FAT file system using Disk Utility in Mac OS. The disk used to be HFS+ encrypted. Encryption was done when I created the OS X Extended partition, not ...
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1answer
67 views

Missing disk space after failed Bootcamp install

Earlier today, while running Bootcamp attempting to install Windows 7 on my late-2012 iMac, I suddenly lost 160g of disk space after Bootcamp failed to create the partition for Windows. Disk Utility ...
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1answer
60 views

Can naming/running a program “sudo” somehow cause problems?

I hope this is an appropriate place to post this--I have no idea what happened. I named a c++ file (a simple sudoku solver) "sudo.cpp" and then compiled it with "g++ sudo.cpp -o sudo" and ran "./sudo"...
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4answers
3k views

Disk structure error reported in Onyx but not fixable via the Disk Utility in Recovery Mode

On Yosemite 10.10 Onyx returns the following error: Error: -69845: File system verify or repair failed Underlying error: 8: POSIX reports: Exec format error The disk needs to be repaired. I ...
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3answers
12k views

How can I mount an encrypted disk from the command line?

When I type diskutil mount disk3 in the terminal, it says Volume(s) mounted successfully. However, the disk is not mounted and I can confirm this by opening the GUI of Disk Utility.app and also the ...
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2answers
46 views

How to exercise a new hard drive by erasing multiple times with Disk Utility app?

In El Capitan, in the Disk Utility app, I cannot find the option to rewrite bogus data (zeros or ones) across the entire drive multiple times. I am using a spinning rust platter disk, not an SSD. ...
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5answers
69k views

What is the best free hard drive diagnostics app for Mac OS X?

My MacBook Pro (described below) fell 5 feet while it was powered on. Would the sudden motion sensor be able to turn off the hard drives in time? Also, can anyone recommend the best (free) hard drive ...
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0answers
22 views

Disk Utilities verifies disk with no repairs needed, but Mount says disk must be repaired

I was transferring some files off an old FireWire drive yesterday, but when I turn on the drive today it doesn't automount. I go to Disk Utility and see the drive, try to mount it, and get this ...
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1answer
40 views

Fusion drive: replace SSD and HDD vice-versa

I've just made a Fusion Drive on my MBP 2012 and restored data from the Time Machine. Unfortunately, right now I read information that the best place for SSD is the main bay of HDD not the optical bay....
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2answers
31k views

White MacBook hangs at gray Apple screen forever, won't boot to single user, won't mount using Disk Utility. What do I do next?

After a forced shutdown, my white MacBook hangs at the gray screen with the Apple logo and an infinitely spinning progress wheel. I can boot in verbose mode, but I didn't see any particular error, ...
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3answers
28k views

Error: “The operation can’t be completed because one or more required items can’t be found. (Error code -43)”

I accidentally pulled an NTFS hard drive out of my Mac OSX Mavericks machine several times and realized that I accidentally created multiple entries of many different names in my /Volumes/ folder. Now ...
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5answers
24k views

Is there a utility for mac that shows the information of an SSD like the health etc…?

I am wondering if there is a utility for the mac that allows you to see the details of an SSD like the health of the drive, TBW (total bites written), how many running hours etc... In researching for ...
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0answers
47 views

Thunderbolt Drive issues with iMac Late 2015 OS X 10.11.4

I have two thunderbolt drives attached to my iMac Late 2015 OS X 10.11.4. I am using Mountain to mount/unmount drives. When I unmount the a drive it continues to spin, until I turn the drive off by ...
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1answer
55 views

How I put OSX on a disk with badblocks, while avoiding them?

My MacMini hdd, some months ago, stopped booting. Upon inspection, seemly a tiny amount of sectors got corrupted, but in system-related areas, and OSX went bonkers and destroyed half of my data while ...
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1answer
54 views

I need to make my partitions into a single one after a failed bootcamp, how do i do this?

I am a complete novice when it comes to macs. I recently tried to use bootcamp to run windows 10 and partition part of my hard drive. I used the bootcamp assistant and I followed all of the steps but ...
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1answer
52 views

Is it possible to encrypt a hard drive that is dual booting ubuntu using rEFInd?

I recently installed ubuntu on my macbook pro. I am using rEFInd to dual boot ubuntu. Following the installation, I tried to encrypt my Macintosh HD partition by first converting the disk to core ...
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1answer
51 views

Boot Camp won't work: why don't I have disk0s0 or disk0s1 partitions?

I'm trying to use Boot Camp after resolving a partition mess. I've gotten back to a single partition after receiving the The startup disk cannot be partitioned or restored to a single partition. ...
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5answers
93k views

How do I get an operating system onto a new hard drive?

I will be installing a new 500GB hard drive in my macbook. It is a late 2008, aluminum, 13-inch screen. Once I install it, how do I get an operating system that's 10.7 or newer (downloaded from the ...
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1answer
190 views

Unable to boot Windows 10 from Bootcamp external HDD

I have installed Windows 10 Pro in Mac OS X El Capitan using Bootcamp, restored the same to external USB 3.0 HDD using WinClone Pro. Now I am getting error when booting to Windows. Steps followed: ...
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0answers
102 views

Time Machine partition won't mount in OSX El Capitan, but mounts in Bootcamp Windows 10

Not sure what happened. Two days ago I just did a Time Machine backup and today the partition won't mount. The external disk is a WD My Passport bought several years ago and total 2 TB. I partitioned ...
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40 views

Open a corrupted .dmg

My MPB crashed and had some permission issue on booting. I tried some repairs with the recovery session but now it has a kernel panic... I have an external device I can boot from, and I made a copy ...
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0answers
38 views

How can I add a partition to my Seagate external hard drive?

I am trying to add a partition to my Seagate external hard drive so that I can install Windows 10 on it but it won't let me add a partition at all. With a previous external hard drive I had (that no ...
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2answers
945 views

Can't erase unmountable external HD

My external HD isn't mounted and can't be repaired by Disk Utility. However, I'm also unable erase the disk: $ diskutil list disk2 /dev/disk2 #: TYPE NAME ...
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1answer
593 views

Hard drive boots over USB but not when install internally

I am trying to upgrade from a 500GB HD (http://www.newegg.com/Product/Product.aspx?Item=N82E16822136314) to a 1TB HD (http://www.newegg.com/Product/Product.aspx?Item=N82E16822152291). The only spec ...
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0answers
59 views

Move user folder (HDD) back to main drive (SSD)

Since large SSDs were quite expensive a while ago, I've moved my User directory to a 1 TB HDD back then. Now I'm going to upgrade to a 1 TB SSD and am thinking about the best and safest way to move ...
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0answers
79 views

Making Fusion Drive with USB-attached SSD?

I'm working with lots of VM images on my Mac mini and I'm looking for ways to speed things up by converting a data partition on the internal HDD into a Fusion Drive setup with an external SSD (...
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2answers
264 views

My SSD Drive has been converted to a Core Storage drive and cannot be erased/reformatted?

I put an SSD drive into my macbook pro. I should say that this drive hadn't been formatted and was a bootable drive with Yosemite OS on it, taken from another macbook pro... I booted the system up in ...
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0answers
71 views

MacBook Pro intermittently won't let me login after sleep

I am occasionally running into problems where I can't login after sleep. Sometimes I open the lid of my Macbook Pro and it shows the usual login screen, but if I type my password in and click enter ...
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2answers
144 views

Macbook Pro Hard drive speed

I have an early 2011 Macbook Pro with a Toshiba MK7559GSXP 750GB 5400rpm hard drive (that has about 48GB free) and running El Capitan. Recently I had the feeling that things were running slowly (and ...
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297 views

After stuck “Partitioning disk” by Boot Camp

I use a MacBook Pro Late 2011 with OS X El Capitan (10.11.4). I wanted to install Windows using Boot Camp Assistant. However, I got stuck at Partitioning disk.... It seems that it is a very common ...
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32 views

Undo/Recover a quick formatted JHFS+ HDD drive

I just have made the biggest mistake in my life, accidentally format ~2TB of my personal data. Here is information about the Disk : 2TB HDD Drive : GUID Partition Map : OS X Extended (Journaled) : ...
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3answers
69 views

Does a slow Time Machine disk affect general Mac performance?

Say a Mac Pro tower has OS X + Apps installed on a blazing fast PCIe SSD. It also has Time Machine enabled on a slow 5400rpm mechanical drive. The TM drive is internal and connected at all times. ...
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1answer
98 views

unlock external locked encrypted disk with applescript command by filling dialog box to cracking password by force brut

I make a terrible mistake. I totally lost my paper with the secret password for my encrypted external GUID hard drive. This external drive contains many pictures but also some works documents very ...
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1answer
25 views

Macbook Retina recognizing replaced SSD as external despite being internal

Just bought a Retina Macbook Pro and swapped the SSD for a 1TB drive, it boots and seems to run fine, except the drive in 'about' shows as external and when I set in finder show/hide external it ...
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0answers
23 views

Lost disk space after partitioning w/ disk utility crashed

I made the mistake of deleting a bootcamp partition thru disk utility in hopes of making a larger partition with a fresh windows install. As I tried making a new FAT partition in disk utility I ended ...
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1answer
43 views

How to reformat Macbook Pro SSD to regain “Free Space”

I just tried installing Windows 10 through Boot Camp. Before it actually started installing (but after I had partitioned my disk), I realized I had not plugged in a USB (which apparently you are ...
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29 views

El Captan disk utility did not see erased partition after fail bootcamp install

I try to get my full drive after fail a bootcamp install of Win. Now I have removed extra partition from my fusion drive, but can’t see empty space using the el captan disk utility. Using shell, ...
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2answers
60 views

What types of problems could lead to 10 logic board failures across 3 different laptops? [closed]

In March 2012, I bought a new 15" MacBook Pro. It required 3 logic board replacements over the next 13 months, leading Apple to replace the unit with a new 15" MacBook Pro in April 2013. That computer ...
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1answer
103 views

Messed up my 1TB Fusion drive on my iMac with Disk Utility

Soooo something bad happened recently with my 1 TB Fusion drive on my 5K late 2015 iMac. I was creating a new 100 GB partition on my disk. So while the disk utility was busy scanning etc (doing its ...
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4answers
1k views

How do I know if I need a new hard drive?

I just received a MacBook Pro from somebody else because it was running too slow. Booting up takes about 4 minutes. I have tried formatting the drive and reinstalling the operating system from ...
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1answer
25 views

How can I back-up my OS X instance and Restore from mounted drive?

Synopsis I have been having trouble With my MacBook Pro (Mid '12, 15") I deployed tonnes of work Sunday evening/early hours Monday morning before I went to bed, leaving my MacBook running but ...
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1answer
41 views

Can the cp command be used to restore a hard drive?

My cousin contacted me for tech support because her computer was refusing to boot to the startup drive, and the issue turned out to be a corrupted drive that Disk Utility refused to fix, telling us to ...
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1answer
5k views

New Hard Drive Install Failure

I have a problem with my 2012 Macbook Pro, I'm trying to install a new WD Black 750 GB SATA III 7200 RPM in it. The problem is when I try to reinstall OS X Mountain Lion, it didn't find the drive I ...