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

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Does free disk space actually help mac performance?

Anyone will tell you that freeing disk space will make your mac faster - specially noticeable if your disk is almost full. I don't know if that's true. Is it? And why, exactly? I just don't see how ...
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116 views

Hard Drive Scraping Noise and the Flashing Inquisitive Folder

Hey I'm having the flashing question mark folder issue. My hard drive is also making this noise like tschhh, tschhh, tschhh, tschhh. Holding option does nothing, it just makes it load to a grey ...
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55 views

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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122 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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123 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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84 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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264 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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64 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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110 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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727 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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531 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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993 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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969 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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551 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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662 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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616 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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328 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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269 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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551 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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529 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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517 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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12 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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14 views

MBP 13" Mid'09 - HDD can't write?

My MacBook stopped booting some days ago. I was able to read all the data by booting from an external drive with recovery software. But it was not possible to reformat the disc. Then I tried to get ...
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21 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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43 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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24 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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26 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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32 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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30 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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32 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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20 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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51 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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16 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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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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33 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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19 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 ...