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

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What should I do to restore my computer's hard drive to how it was before I partitioned it? (and do I need to?)

For a few months, I used the hard drive on my iMac to do Time Machine backups for my MacBook until I got a Time Capsule. Since Time Machine refused to back up directly to the iMac's HD, I partitioned ...
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121 views

Time Machine and an Unmounted Internal Drive

A couple of weeks back I put an SSD in my macbook, keeping the old spinning disk drive around using an expansion bay. Everything went fine, and I got it backing up. However, having the SSD around, I ...
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122 views

Diagnose if corrupted volume is due to hardware problem

This morning when turning on a Mac laptop, it suddenly announced that an external backup disk (which was connected overnight) "can't be repaired". Disk Utility also says: Disk Utility can’t ...
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83 views

Error during install Leopard on iBook G4, now can't mount drive

I have an iBook G4 that was running 10.3.9 and I was attempting to install 10.5 via Firewire transfer as the optical drive is not working. During the install, the power lead failed and the laptop ...
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53 views

Can I enlarge a RAID10 with Disk Utility?

I have a 4TB RAID10 (4x2TB disks) created with Disk Utility. I also have 4x4TB spare disks. Can I enlarge the RAID10 to 8TB (4x4TB)? This post suggests that I can break each mirrored set, and ...
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123 views

Acceptable and unacceptable speed for an external USB disk

I think my external HDD is running way too slow but I am not sure. Using XBench I get the following results: Seq: Uncached Write 0.79 0.49 MB/sec [4K blocks] Uncached Write 0.21 0.12 MB/sec ...
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254 views

Hard drive can not be partitioned after shutdown during prior partition

Whilst partitioning my Mac Hard Drive to install Windows 7 via the bootcamp assistant, my computer - oblivious to me until too late - ran out of charge. When I turned it back on, as expected, the was ...
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62 views

Can I restore my Time Machine copy from a restored external disk partition?

My external hard drive didn't recognize one of the partitions so I had to bring it to the support guys in order to restore the files if possible. They gave me back the hard disk with some of those ...
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109 views

How to sync 2 hard drives without being connected to them at the same time?

Set-up: 1 external hard drive at work 1 external hard drive at home Macbook that travels between work and home Hard drive contains iTunes Music Library that I like to have synced between home and ...
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2k 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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710 views

My Lacie 'Rugged' external hard-drive no longer mounts

My Lacie 'rugged' 1TB external hard-drive has stopped working. I have always been sceptical about the USB connector cable, and more specifically where it joins the hard-drive. It just seems poorly ...
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529 views

Why is Intel 520 SSD slow in my Mac Pro?

I have a 2010 Mac Pro running OS 10.9 on an Intel 520 SSD. I've noticed read/write times are much slower than Intel claims. Is there anything I can do about this? Intel's claim: Sustained sequential ...
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991 views

2007 15" macbook pro disk full won't get past login screen

I was trying to help my brother fix his computer: A pop up that comes up at login that will tell you that your startup disk is full, he logs in and the screen gets stuck without loading any files. I ...
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948 views

RAID 1 array degraded, now not being recognized by OSX

I've got a pair of Seagate 3TB HDDs in a mirrored RAID 1 array using a Vantec NexStar MX two-drive enclosure. The setup has generally worked fine for the last four months, but lately I've noticed that ...
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545 views

MacBook Pro Mid-2009 13 inch does not recognize replaced hard drive

As the title states, I recently got a used Hard Drive from another MacBook Pro and installed it into my MacBook. The problem, is the laptop will not recognize it at all. The old hard drive just goes ...
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653 views

How to select which disks are allowed to sleep?

There is an option "Put the hard disk(s) to sleep when possible" in Mac OS X's preferences: Is it possible to configure which disks Mac OS X can put into a sleepy state? For example, I want to ...
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239 views

Recover a deleted encrypted partition?

As my previous external HDD threw some disturbing SMART Warnings, I bought a new Hard Drive. It arrived earlier today, I formatted it and made some backups onto it at it has more space and I wanted to ...
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610 views

Fusion Drive not moving data back to SSD - anyone encounter this?

I'm about to buy a Mac Mini and have got the DIY Fusion Drive parts handy. I'm actually a bit on the fence about the choice of manual SSD+HDD separation with the aid of symlinks and proper Fusion ...
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343 views

Restoring Win7 image to new bigger partition in Mac OS Mountain Lion

I had 80% of my HDD for Mac and 20% for win7... I needed more space on Win7 so I did the following: Created disk image of Windows partition, using Mac's Disk Utility Used Boot Camp Assistant to ...
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2k views

What steps can I take to recover data from a FileVault 2 encrypted boot volume that won't boot and is stuck in “converting” status?

I have a 2008 Macbook Pro running OS X 10.8 on a 500GB (upgraded from original) 1-2 year old hard drive. The drive was encrypted with FileVault2, and the system was running fine a few months ago until ...
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327 views

Why do external hard drives stop working under very specific conditions?

I have a mid 2011 MacBook Pro 15" running Lion. I have seen this behavior across 3 different external hardrives, with varying manufacturers (2x Seagate, 1 Western Digital), different file system ...
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267 views

Hard disk full error!

My Macbook Pro mid 2012 (non-retina display) keeps showing me that the startup disk is full. I have only one partition for the whole system and it is 750 GB in size. I am sure that all my files ...
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549 views

How to break away from LaCie Big Disk Extreme firmware, for its two disks to appear as two instead of one?

Question How can I reconfigure a LaCie Big Disk Extreme so that Mountain Lion will see both of its disks? Background Once, years ago, I accidentally did something bad to a LaCie device. Where ...
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526 views

“Invalid key length” - corrupt partition after power outage?

I recently lost power overnight with my computer up and running, external hard drives plugged in, and in the morning my login screen had the "Device Removal" error as if I unplugged the disk without ...
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102 views

Transfer data to rMBP from external hard drive?

I got the new rMBP and tried importing my stuff to it via an external HD. Seems like it didn't work. And Migration Assistant didn't either. Has anyone done this successfully?
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163 views

Find Time Capsule HD Specs

How can I find out the specs from my Time Capsule hard drive? It doesn't appear in Disk Utility (a mounted disk). More specifically, I'd like to know the manufacturer and model, much like the System ...
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3k views

Disk Utility Error Message - Missing EFI + MediaKit

Previously setup was with 2 partitions, one for normal use while the other had the Lion Install ESD on it, used when I installed some time ago. The other day my machine suddenly shutdown and when I ...
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178 views

Failing hard drive – Will it affect the integrity of my data?

I have a failing hard drive on my current MacBook Pro (it is having a symptom that I previously had on a failing hard drive on a MacBook – clicking drive noises). I'm backing up my hard drive quite ...
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117 views

Lion doesn't mount encrypted disks anymore

I have several encrypted disks and all of a sudden Lion isn't mounting these disks anymore (it doesn't even asks for a password when I plug the disks). I have tested the disks on another Mac and they ...
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511 views

MacBook Pro: Strange crashes

I purchased a new 13" MacBook Pro about a month ago. I'm pretty happy with it for the most part, but I've been having a few issues which I find very worrisome. I'm a computer science student, but my ...
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546 views

Restore 200mb EFI Partition/Write Support for WIN7 HFS+

So I posted earlier about recovoring an HFS+ partition on Windows. I used Testdisk with awesome success. Now I've run into another issue. The biggest issue is that I need to read AND write to my ...
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15 views

Deleting files keeps increasing the used space on my SDD

i have a mac air with a 120gb sdd, the drive is regularly filled up with iso images, virtual box files and docker/vagrant stuff, i got a warning today saying disk space was low and i had about 8gb ...
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8 views

iMac 24" 2.16 ghz core2duo

I'm trying to install Snow Leopard but iMac won't boot from the install disk. I've also tried booting from a flash drive with Snow Leopard Install on it with no luck. It also will not boot from the ...
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14 views

Prevent internal drive from mounting automatically

I don't use the internal hard drive on my iMac any more, but for obvious reasons, it's awkward to remove it. I'd like to stop OS X from automatically mounting it when the iMac boots. Is this possible? ...
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15 views

Hardware Failure. Mac won't start

I have a Macbook pro from 2010 running 10.6. Recently, it has been acting very weird. It often freezes and when rebooted gets stuck at the loading screen. After enough reboots it does work. When ...
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Early 2011 Macbook Pro shut down during start up

My MBP has OSX (El Capitan... I'm pretty sure) and Windows 10 on it. The OSX shuts down during start up. It will show the apple logo and then a load bar that reaches about half way before the system ...
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Can I download files directly into alias folder for Logic Pro X?

If I try to download sound files for Logic and they are supposed to get downloaded into the folder at ~/Library/Application Support/Logic/ and I have that specific folder made as an alias to a set of ...
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11 views

OS X stopped recognizing my HFS+ Time Machine partition on my USB GPT disk

I have a 2 TB USB drive that's using GPT, but OSX (10.11.4) on my macbook pro (early 2015) stopped recognizing my HFS+ partition after I inserted a partition before it ("TESTPART"), effectively making ...
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24 views

External SSD not recognized after ejection or reboot

I have an USB external mechanical disk. It works fine, and I can remount it after ejection. Also, it is mounted automatically after a reboot, as it should be. I got an USB external SSD, too. It works ...
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17 views

Had to reinstall OS X due to corrputed journal: is this a symptom of something more serious?

I have a 13'' Macbook Pro from early 2011 with a Hitachi 320Gb. HD, using OS X 10.9.5. For the last few months, it's gotten slower and slower to become responsive every time it wakes up, and I've also ...
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29 views

Recover folder hierarchy, file names, file metadata from drive?

I'm posting this on AD because I'm using a Mac (Yosemite) to do the job. This is the situation: Friend 1 has a 600GB external HDD (FAT 32 formatted) that he has been using with Windows 7. With ...
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19 views

How to safeguard OS X Drive from accidents

While browsing i found this question Accidentally used dd on my main OSX drive Is there a way to safeguard or block these kinds of things to even run specially on my OS X Drive? Also noticed that ...
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21 views

Time Machine Network Connected to USB Connected Hard Drive

I have a Seagate 2TB hard drive that I connected to my router and have been using for Time Machine backups for the past two years. Recently I have disconnected this hard drive and attached it ...
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29 views

howto encrypt “WD My Passport Pro” online? support.wdc.com with dangerous solution (no security)

I wish to encrypt my WD My Passport Pro drive. I receive error With Google I found An error message occurs when attempting to create an encrypted backup on a My Book Thunderbolt Duo in the Mac ...
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15 views

There appears to be data corruption when copying data from the hard drive to SDCard

When I copy some files from my hard drive to my SD Card the files become corrupt. But not all of them and not all the time. I get the following error: Unidentified codec VLC could not identify ...
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Blinking “forbidden” and “question mark folder” symbol. SATA cable is the problem?

A couple days ago my macbook pro mid 2012 was running perfectly, with a SSD drive that I,ve installed about a hear ago (I also updated my ram up to 8 gb). The day after that I turned on my computer ...
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69 views

Revert Apple CoreStorage volume back to Apple HFS

I have a computer that is encrypted with Symantec PGPWDE. A scripting error occurred when trying to decrypt the system and remove PGP and convert the disk to CoreStorage to prepare for using file ...
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56 views

El Capitan keeps creating new mountpoints for external drive

I am new to Mac, I used Linux before and I am experiencing troubles with my external HDD (NTFS formatted). I used osxfuse to mount it as read write (via ntfs-3g) - I used tutorial from this site ...
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25 views

Large Library/Containers directory

The directory ~/Library/Containers has size 39GB on my system. This is huge. I guess that the directory contains some files created by running various apps. So the more applications I use, the more is ...
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Mac OSX installed in 2 Hard Disks. Want to Remove applications and OS from one

I have a 13" Macbook Pro (Mid 2012) (El Capitan). Recently, I replaced my Optical Drive with a Samsung 250GB SSD. After some days, when I booted up my Mac, it showed white screen and quick google ...