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

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How to restore Mac OS X on a new hard-drive?

I am going to upgrade my MacBook Pro hard-drive, but before doing so I'm trying to figure out how to restore OS X on it. My DVD drive doesn't work so I cannot re-install from the DVD. I have a recent ...
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4answers
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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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3answers
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Is there anyway to expand my MacBook Air's hard disk?

I have a 2011 MacBook Air(11-inch), I am using OS X 10.9, but I only have 64GB Flash Storage, and I want to expand the storage of MacBook Air's hard disk. I asked geniuses at Apple and they told me ...
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2answers
888 views

How can I copy data from an external HDD that is about to fail?

I have an external HDD that is about to fail. I want to copy as much as I can to a new external HDD before it completely dies. I've been able to start copying files for a few minutes before the drive ...
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3answers
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Disable mounting Internal Macintosh HD at boot

My iMac (mid-2010 model, Snow Leopard) has a problem with S.M.A.R.T status: Failing and it has become read-only. Because I didn't want to waste money on the repair, I bought an external HD, so the ...
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3answers
994 views

How can I increase the time before my external drive powers down?

I have an external USB drive from LaCie that is connected to my MacBook Pro – almost all the time. So whenever I don't use it for a few minutes, it powers down. That means, it takes a few ...
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After enabling File Vault, OS X doesn't mount disk automatically anymore

I have an external 2 TB LaCie drive connected via FireWire 800 to my MacBook Pro (8,2 – early 2011 model), which runs OS X 10.8.5. It has one big partition which is a Time Machine target, and the ...
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1answer
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Can't restore to backups after removing disk in Time Machine

I've been using a WD 2TB HD for the last two months to handle my Time Machine backups for my Macbook Air. Yesterday, I wanted to set it up to handle backups through the network. In the Time Machine ...
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1answer
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Extremely slow write speed to encrypted external drive on Mavericks

Writing to a fully encrypted USB flash drive on Mavericks is extremely slow. The drive model I used for testing was a Kingston DataTraveler Ultimate 3.0 G3 (64 GB). I tested transfer speeds by ...
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How to identify and fix files with corrupted / inaccessible disk blocks

I have a late 2011 Macbook Pro, running Mavericks 10.9.2. Its sole HDD is a 750GB drive, formatted with Bootcamp. It's still running reasonably well, but in running a defragment pass on it, I've ...
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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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Disconnecting disks from Airport Extreme

Since Apple released the new Airport Utility with the simplified UI, there doesn't seem to be an option to "Disconnect All Users" to kick all users off a hard drive to safely remove it when connected ...
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1answer
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“Encrypt backups” disabled for Time Machine on Mavericks; due to partition?

I picked up an external hard drive a while back and have been using it for Time Machine back-ups. Recently I thought to confirm that the disk is encrypted so that it won't be useful if someone nicks ...
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2answers
4k views

How can I make my computer believe a disk image is a hardware disk?

I'm trying to do some research on TimeMachine right now. I don't want to purchase an external hard drive, just to learn about some software, and so I'd like to be able to tinker with the settings, by ...
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1answer
533 views

How do I change the name of the hard drive

Right now my hard drive is called "Macintosh HD." How do I change it to something cool like "Death Killer"
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1answer
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How can I modify an existing FAT partition without losing its data?

I have a 1tb hard drive. Long a go I split it it into two partitions. One I left as a Mac OS extended (journaled) with 990GB and one as FAT with 10GB. Now I would like to add about 100GB to the FAT ...
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8answers
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Checking for bad blocks without formatting

My Mac tends to pause every now then when preforming simple tasks such as right clicking, opening menus and typing (It actually just froze when I started typing this question.). I've read in a few ...
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2answers
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What are next steps when fsck reports “could not be repaired after 3 attempts”?

My Mac Book Pro 13.-" doesn´t get past the grey booting screen with the apple and the spinning wheel (The loading bar appears but when it´s done nothing happens) I have 220 GB in one single ...
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2answers
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What terminal command or program can list an SSD's Power On Hours?

I'm looking to script using the unix shell the retrieval of SSD (and HDD) data that disk utility shows in the information window. I'm immediately interested in the Power On Hours and Power Cycle, ...
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2answers
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How to fix “Error: -5341: MediaKit reports partition (map) too small” after upgrading to a larger hard disk?

I recently bought a new SSD drive, as my stored data amounts outgrew the old one a little bit. After copying all data using dd if=/dev/disk0 of=/dev/disk1, I want to enlarge my system partition, but ...
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2answers
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Aperture: Library over multiple Hard Drives

I switched to Aperture some time ago. And right now, the moment has come that I want to save some space on my internal hard drive. What I found on the Apple website is this: I can't seem to find ...
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1answer
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Why is exFAT so slow on Mac?

I tried exFAT in order to use my external hdd on both mac and windows but I found it's so much slower than HFS+. The speed is noticeably different when I tried to fast forward movies (over 4gb). ...
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1answer
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Can I have two Time Machine partitions on one hard disk drive?

I know that someone can use a partition on a hard disk drive for Time Machine, but is it possible to specify more than one partition on a single drive for this purpose? The scenario: My partner and ...
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2answers
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Encrypted external drive usually prompts for password, despite being in keychain

I have an external encrypted drive, and almost every time I plug it in, it'll ask me for the password, even though it's already in my keychain. If I type the password in, it'll mount as expected. ...
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2answers
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Unable to format pendrive, diskutil error

When I insert my USB Pendrive in my iMac i see this message: I tried to format it both with DiskUtility and with diskutil command in terminal but I get this error: iMac:~ User$ diskutil eraseVolume ...
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3answers
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fsck and Disk Utility won't repair Volume: invalid b-tree node size

I accidentally wrote some .iso data to a disk through dd by mistake. I cancelled the command after just 2 seconds but that was enough to wipe the first EFI partition (200MB) and a bit of the second ...
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3answers
307 views

Time Machine External Drive

What factors are important when selecting an external hard drive for time machine backups?
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1answer
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External Hard disk 500 GB free but can't copy 8 GB data

I have WD external hard disk, which was working fine. Its MS-DOS formatted. I have downloaded a file in .mkv, which works fine, and isn't corrupted. Upon copying the 8 gb file, it says "The file is ...
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4answers
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Is it okay to install OS X on an external drive, and then install that drive as an internal drive?

My internal drive is suffering hardware failure, so I bought OS X Snow Leopard (to upgrade my iMac from Leopard), a new drive, and a cheap external USB 2.0 enclosure. My plan is to install a clean ...
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2answers
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Can I use an Advanced Format drive in a Late 2010 13" MacBook Pro?

I have the 13" Late 2010 MacBook Pro, and the 250 GB Hard Drive is way to small, so I'm looking to get a bigger one. I wanted to upgrade to a 750 GB WD Scorpio Blue (WD7500BPVT), but I've read ...
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1answer
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How can I tell which volume the operating system is on?

I'll admit that I am kind of rolling multiple questions in to one here so please forgive me and try not to knock me for it. I am new to Mac but I'm trying to port one of my Java applications to OS X. ...
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How do I determine the speed of a disk drive?

I'm looking for a way to determine the read/write speed of a disk drive, either by looking up some system information or running a simple benchmark test utility.
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What is filling up my hard drive so fast?

Last night (Because my hard drive was almost full) I freed about 4GB. Then I came back to my Macbook about 3hrs later (I left it idle) and Its was full again. Is something is eating my mac? If I go ...
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3answers
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What is an SSD drive's negotiated link speed?

When I look at my Apple SSD TS256C (Toshiba) in the System Profiler on my MacBook Pro (Late 2011), I see: Link Speed: 6 Gigabit Negotiated Link Speed: 3 Gigabit Why is that? Does that mean ...
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4answers
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Mac Application to defrag my Mac drive

I work on media files as per my profession. I find my Mac (Mac Lion) going slower day by day. I think it will be beneficial to defrag the drive but didn't find any Apple tool for it. I want a an ...
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2answers
168 views

How to fix Mac hard drive partition showing as Fdsik_partition_scheme

My situation seems very similar to how to fix GUID hard drive corrupted to MBR but with enough differences that I haven't been able to put together a confident solution. I have a 3TB Toshiba drive in ...
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4answers
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How to upgrade firmware and reperform a Samsung 840 Evo on a Mac

i got one of these Samsung 840 Evo Basic 500GB on an iMac (used externally in a TB case - standalone, not Fusion). I know there's a firmware update out which is already available for Mac users too ...
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2answers
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Error-“Unable to write to the last block of the device.”

I am trying to setup a new hard drive into my Macbook Pro. However, I keep getting an error in disk utility that states, "Unable to write to the last block of the device." I saw another person was ...
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How to set VirtualBox in order to access external hard drives in guest Win7?

I have installed VirtualBox in order to use Windows 7 as guest on a Macbook Air running Mavericks (mainly to be able to use a printer that has no drivers for Mac). Also, I have installed the ...
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1answer
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What kind of encryption does Mac OS X Extended (Journaled, Encrptyed) use?

Since my primary hard disk is encrypted with FileVault2, I also wanted my backup drive to be encrypted. I plugged in my external drive, brought up Disk Utility, and went to erase/format the disk. I ...
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2answers
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How can I let Windows XP read Mac OS Extended (Journaled) drives?

How can I let another PC using Windows XP (Service Pack3) read Mac OS Extended (Journaled) volumes? Windows XP shows nothing.
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1answer
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How can I do a fresh install of OSX Mountain Lion onto my SSD for my Macbook?

My macbook is sluggish and has so much stuff that I don't use anymore and just want to start over from scratch basically. I did a time machine backup just in case something goes wrong. New blank SSD ...
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2answers
3k views

Why is it important to keep lots of freespace on OSX? What is the impact?

I have a 500GB drive and have less than 50 GB free. Console is reporting several interesting errors saying I'm too low on space and it's cleaning up "stuff" 1/6/13 4:49:51.475 PM ...
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5answers
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Do 2.5" SATA HDDs in an external enclosure need extra power over USB with Windows?

MacBook Pro 2008 motherboard failed. Upon sending it to an Apple authorized repair center, they confirmed this. They gave me the laptop back so I could open 'er up and get the hard disk out, which I ...
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1answer
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How can I recover files from a failing hard drive?

I am in the process of trying to recover files from a failed MacBook hard drive. While I've already replaced the drive in the machine itself and installed a fresh copy of OS X, I have the old drive in ...
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2answers
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How can I prevent external hard disk from sleeping when connected to Airport Extreme?

I have a 1TB external hard disk from Seagate connected to the USB port of my Airport Extreme and everytime I need to access it I have to wait some time until it leaves the sleep mode. Is there a way ...
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1answer
403 views

Diagnose disk I/O per application

I have a Leopard system which feels rather sluggish, and which I suspect may be disk-I/O-bound. While I know how to check which app is using CPU or memory (top or Activity Monitor), I don’t really ...
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2answers
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How to empty MobileBackups.trash content

I noticed that OSX reports a wrong disk space amount, reporting that "Other" space is near to 170Gb. Digging into the issue here "Huge inconsistency in disk space measurement, missing 50% of the ...
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2answers
2k views

Disk space disappears to 0, then after a while I have free space

I've been having this problem for quite a while and it happens occasionally and when it does it get very frustrating and I'm just trying to pin point what is causing it. When it happens, the disk ...
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2answers
1k views

Space Occupied By Other Files And Folders On Hard Drive

I have been using VirtualBox to create a virtual machine to run Windows 8 on and after deleting the virtual drives and virtualbox due to having issues with Windows 8, I am missing a lot of memory from ...