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

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134 views

Can a mac do a bitwise copy of a USB disk with proprietary disk format?

I have a USB disk with a propietary format that I want to bitwise clone to a new identical drive. I have CCC but the disk doesn't show up in Finder. It does appear in Disk Utility. I tried ...
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65 views

What to do if repairing one disk made the other unrecognized?

Originally I had two drives, an HDD and an SSD (my boot drive). The HDD had a 100gb partition on it that used to have windows installed on it, but that partition got locked and became unusable. When I ...
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260 views

Raid two external hard-drives with read/write support on Windows & OS X

I have a USB 3 HDD enclosure that currently has two 1TB drives in it. I am looking at buying another external USB 3 HDD drive (not an enclosure). I am currently running the external enclosure with the ...
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168 views

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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121 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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124 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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126 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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85 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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125 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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276 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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757 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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547 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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1k 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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994 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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559 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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679 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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241 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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619 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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334 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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271 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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565 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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536 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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164 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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118 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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520 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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547 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 HFS+...
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13 views

Time Machine Backups - Very Slow and inaccurate size

So about 1 1/2 years ago, I bought a WD My Passport for Mac as my Time Machine backup disk and a place to store files. When the drive gets around 5 or so backups, I still have plenty of free space ...
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20 views

Transferring Windows 7 OS from my Mac to an external harddrive

So, in disk utility my Windows 7 is under the same internal hard-drive as the Mac OSx, but it shows that my Windows 7 OS is also not-mounted and the format is MS-DOS (FAT). I want to literally just ...
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5 views

Cannot make a new partition out of empty disk space

El Capitain on a Macbook Pro 2012. I have more than 100GB of empty (unpartitioned) space on the main hair drive but the Disk Utility does not allow me to partition it. All the controls (partition name ...
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17 views

Transferring from HDD to SSD - Error while Migrating Old Data

I recently installed an SSD in my girlfriend's Early 2011 MacBook Pro running 10.9. I put the old HDD in an external enclosure connected it to the computer with a USB cable. I formatted the SSD ...
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27 views

Can I boot from an external drive that has Windows installed?

I have a MacBook in which I installed Windows 7 SP 1 using Boot Camp Assistant. The laptop itself is too old and sometimes I run into glitches, e.g., screen is black but light is on. I also have a ...
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11 views

Macintosh HD partition only 90gb

I was trying to delete my Windows 10 partition but there was an error with bootcamp saying that I couldn't delete the partition. I booted into single user mode and typed the command /sbin/fsck -fy ...
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12 views

WD Passport USB 3 Drive HSF Journaled is recognised but the drive won’t mount

I accidentally ran Recovery Disk Assistant on my USB HD .Then the Hard drive stopped mounting or showing up in Disk Utility . It showed up in terminal though On Googling i found gdisk to be the ...
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9 views

Persistent HDD/SSD problems

I have a MBP Late 2012 (non-retina) and two years ago I upgraded my computer to use two SSD's, 240GB on the main socket and a 120GB on the drive caddy and I had no problem until this year. The first ...
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37 views

Can 'Repair Disk' in Disk Utility harm my data?

I have a MacBook Pro 2011, which suddenly isn't booting properly. When it starts I press Cmd+R to get to Disk Utility, and I used Verify Disk and got: Invalid leaf record count (It should be 2142 ...
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32 views

How can I use my thunderbolt 2 hard drive on the new (usb-c) Macbook?

I want to upgrade my ageing Mac Mini to a new mac this fall (probably a new macbook pro) and I'm assuming they'll be USB-c only. I have 2 big external hard drive daisy chained that only have ...
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19 views

How to fix Toshiba external hard drive with missing EFi system partition?

I plugged my sister's Toshiba hard drive into our TV. After I unplugged it and plugged in back to our computer it says that the disk cannot be read so I tried to repair it using the Disk Utility on ...
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10 views

Can not boot anyway to restore files

I can not get my Mac Book Pro to boot. It will only boot in Recovery mode. I am assuming I need to reinstall the OS but anyway to save files? What if I connect the hard drive to an enclosure and ...
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25 views

Cannot Enable Jounraling (OSX Lion 10.7.5)

so I am trying to enable journaling on my main disk. I booted up from a thumb drive with OSX installed on it and opened disk utility, and the button enable journaling is greyed out and unclickable. It ...
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30 views

External Hard Drive Not Showing Up after dragging it to Terminal?

So from the left side of the Finder I accidentally dragged my external hard drive and now it doesn't appear there. I would like to see it there, I know it's reading it because I did an ls /Volumes and ...