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

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Can't log into my MacPro user account

I have an older Mac Pro in 10.11. After a minor update, I can no longer log into my main user account (which is a standard account) with all my files; the rotator goes indefinitely. I can log into any ...
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3answers
59 views

Swapping HDD RAID 1 with SSD in Mac Mini

I have a Mid 2011 Mac mini with 2x 500G HDD configured as RAID 1. Recently one of the HDD died. I planned to replace the dead HDD with a 500G SSD, and let the RAID 1 rebuild Is this a viable ...
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92 views

“Operation can't be completed because item with name already exists” error with Paragon NTFS

I reinstalled Mac OS X El Capitan 10.11.5 on my 2013 MacBook Pro, today, and I've been having an issue copying files from my NTFS formatted external drive using Paragon NTFS. This issue was not ...
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29 views

Should I have my Mac on until “external” hard drive encryption process is done?

I have a MBP 2012 and replaced the internal hard drive with an SSD and the SuperDrive with a 1TB HDD. I'm encrypting my 1TB HDD. Should I leave my Mac on until it's done? Does OS X pause the ...
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49 views

Screwed up my 1TB HD iMac27 - I am running OSX 10.11.5 need to rebuild it in Terminal

** Not sure what I did but I need to regain the space on my 1TB HD. I have made a full back up and need to know the step by step commands in TERMINAL to do this. As you can see I have access to only ...
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47 views

Time Machine External Hard Drive stopped being recognized

So I got a 2015 rMBP last year and also got a WD MyPassport External Hard drive with it for Time Machine backups. It ran perfectly a few times a week until yesterday when I plugged it into my Mac. It ...
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49 views

Hard Disk problems, unsure of how to proceed

A couple of days ago, I closed the lid on my 2012 MBP running El Capitan with Samsung Pro 830; it had nearly no power left. Power ran out while I was closing the lid, I suspect, so I plugged it in, ...
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1answer
56 views

How to repair HFS+ partition?

So somehow my 2013 Retina MacBook Pro's internal SSD went and got its partition map messed up. I was using it, put it to sleep, and when I woke it back up about an hour later I was presented with a ...
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47 views

Resizing sparsebundle in Disk Utility

I want to resize (shrink) the capacity of the backup.sparsebundle to approx. the size actually taken up the files. What I did thus far I already compacted the image: # hdiutil compact backup....
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44 views

How can I safely create a partition to an already bootable drive

I already asked this question on Apple's community forum, right here, so I'll post the answer here if something comes up there first. This is my problem : I recently bought an external drive of ...
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35 views

How to distinguish a filesystem corruption from a hard drive failure

If I understand correctly when Disk Utility starts throwing errors during a disk verification there are three possible outcomes: some errors can be fixed on the spot via the repair disk ...
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32 views

Can't delete a partition on my HDD

I have created a new partition to install a new OS. Now, I would like to delete the old partition on my hard drive. Delete button is inactive. Screenshots: What I'm doing wrong?
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1answer
34 views

Where is my missing drive space?

I have a 2012 Mac mini running the latest Yosemite that I use as a server for file sharing, FileMaker, calibre, Time Machine and Plex. The Finder reports that the internal drive has a capacity of 499....
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0answers
41 views

How to format a partition for bootcamp without to partitioning all drive?

I'm trying to install a Windows 10 in my MacBook Pro 2012 with El Capitan. I am now in the step that Bootcamp will create a volume for Windows installation. My MacBook got two internal (physical) disk ...
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27 views

Mac Stopped detecting external hard disk

I have 4TB Seagate HDD, it was working fine till this morning on my mac(Yosemite), but when I plugged it in today.. it shows "The disk you inserted was not readable by this computer." HDD gets ...
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35 views

Using disk makes things slow on El Captain

If I run following alias in my $HOME directory: biggest_files='find 2>/dev/null . -type f -ls | sed -e "s/[[:blank:]][[:blank:]]*/ /g" | cut -d" " -f 7,11- | sort -nr | head -25 | awk "{ printf \"%...
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70 views

iMac 5k internal SSD vs external SSD performance

Can anyone point me in the direction of a real-world performance comparison between a iMac 5k's internal SSD and an external one (ideally one on thunderbolt and one on usb)? Basically, I want to know ...
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88 views

Messed up 1TB Fusion Drive Partitions (on iMac 5K) - 100% Disk Space used

my I'Mac 5k won't boot. What happened: I did some image editing in photoshop and instead I resized the image to 1100px i typed 11000px. After this mistake i got the rainbow circle of death. I tried ...
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2answers
63 views

El Capitan can´t see or remove partition but it shows up in Terminal

EDIT: managed to reformat the partition to JHFS+, after accidentaly creating another partition i merged the new and the old one i dint want, then it let me merge all of them together. I created a ...
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1answer
41 views

Accessing files on external drive through USB

I am using a MacBook Pro Late 2011. I lately took out the hard drive and replaced it with a new one. The old HDD still has OS X installed on it, so basically I did nothing before taking it out. Now I ...
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25 views

Missing folder and it's contents on external hard drive. Permissions issues too

I did a deep search to see if I could find an answer. I had posted this incorrectly in the wrong place but then found this group. And I hope some genius can help me. I've had a Toshiba drive that ...
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1answer
73 views

Hard drive full with 200GB of used space that I can't find

All of a sudden I've run out of space. On my 250GB hard drive, 236GB is used up with only 13GB free. I used Finder to find big files. Nothing significant. I used tools like Disk Inventory X, ...
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1answer
45 views

HDD corruption after power cutoff

Yesterday a breaker tripped in the same room as my Mac Pro 1,1 running Yosemite (Hacked boot.efi.) All other machines powered up but this one. Attempting to mount via Target Disk Mode timed out, so I ...
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1answer
58 views

BootCamp partition error even though my drive is one partition

I am attempting to install Windows 8.1 on my machine (a mid 2014 MacBook Pro running El Capitan) and I keep running into a BootCamp error in the first step that says The startup disk must be ...
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1answer
68 views

Drive unmountable FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF issue

I have the standard single drive inside my MBP. The issue is inside my external usb drive. The HDD had 4 (visible) partitions: My Passport (Core Storage volume) 959 gb SSD (backup for my mbp) 339 ...
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1answer
50 views

Bootcamp - Lost 200GB as Bootcamp froze on “while partitioned” for 5~ hours

I was installing Windows 10 via Bootcamp on my iMac (27-inch, Late 2013) running OS X El Capitan - Version 10.11.4. What happen was yesterday Bootcamp froze on "while partitioned" for around 5 hours....
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1answer
27 views

Can I use Time Machine for multiple different backups?

I have my Macintosh HD 500 Gb who backs up on two external hard drives (both 500 GB), so i have always two backups! But i have an other external hard drive (1TB) with a lot of footage on it which i ...
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1answer
83 views

Unable to erase, reformat, or repartition USB drive

This afternoon I attempted to mount a .iso of Windows 7 to a bootable USB drive. It's about 370GiB, so more than enough to store it. I did the following to get myself into this mess. Note,/sda/disk2 ...
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1answer
130 views

First Aid Fails on External Disk, what can I do from here?

History: Running an iMac late 2011 and updated the OS to Yosemite when the computer stopped booting. I have a history of killing HDD so I figured it was a bad HDD and I went to change the drive. ...
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3answers
294 views

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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29 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
135 views

Moving Time Machine backup between two local disks results in full backup instead of incremental

The Problem After migrating the entirety of a a Backups.backupdb to a new hard drive as recommended by Apple by simply copy-pasting within Finder between two local disks, Time Machine encountered ...
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1answer
120 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
142 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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1answer
60 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
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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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2answers
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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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116 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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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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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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46 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
53 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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48 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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92 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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37 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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38 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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1answer
49 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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73 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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66 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 ...