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

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Mid 2009 MacBook Pro HDD/SSD upgrade suggestion? [duplicate]

Possible Duplicate: Trouble with SSD/HDD in Macbook Pro Mid 2009 I have a mid 2009 15" 2.53 GHz MacBook Pro with 8 GB RAM and a 250 GB HDD. Recently, I purchased a WD 1TB 2.5" 5400 hard ...
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4answers
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Recovering data off of a dead hard drive

My hard drive died in my macbook and it no longer will start up. It will not mount in an external enclosure but disk utility is still reading that the hard drive is there, and I tried to repair disk ...
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Is it necessary to eject external drives before logging out, restarting, or shutting down?

Is it necessary or recommended practice to eject external drives before logging out, restarting, or shutting down? (The drives are not being unplugged.) BTW, I am aware that I need to eject my ...
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2answers
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Swap Hard Disks

Is it in principle possible to swipe the hard disk out of a MacBook, swipe a new (blank) hard disk in, install the OS on the new disk, then swipe the old disk back in and find the machine operational ...
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1answer
110 views

Disk Utility: choose disk or volume?

When using disk utility to verify/repair permissions (or verify/repair the disk itself), I've never been clear whether I should perform operations on the disk ("WDC WD1200BEVE-00WZT0" in my case) or ...
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588 views

How to enable “Repair disk button”?

Here what happened with me today. TimeMachine asked me whether I want to set a backup disk, I've answered yes, but then, when I've realized that in order to backup anything TimeMachine will clean the ...
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56 views

Is there a way to monitor the stack of execution in order to find the longest hangs?

Related to this unsolved mystery: apple.stackexchange.com/questions/62416/why-do-i-get-serious-execution-lag-on-clicks-application-switching-and-general I'm wondering if there's a way to see which ...
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732 views

Howto resize copied HFS+ partition above original size (320GB)?

I am running OS X Lion and my laptop has a 320GB drive. I bought a larger drive (750GB) and cloned the entire device from the old drive to the new using GNU ddrescue. After cloning everything looks ...
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How can I keep my fan from staying at full speed after replacing the hard drive?

I replaced a hard drive in a 2011 iMac (Core i7), though it was a standard hard drive and didn't have a location for the S.M.A.R.T. cord. (Or at least I think that's what it was.) Since then, the ...
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254 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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How to fix this disk has 2 partions popup on external HD

I've been recently getting this message when I try to eject my external HD, I only use it for Time Machine backups. How do I stop this message form appearing?
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120 views

Can I place a Western Digital RE3 WD1002FBYS in a MacPro1,1?

I have a bare WD1002FBYS and am wondering if I can place this into a MacPro1,1 (the first Desktop MacPro).
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Fresh install or Cloning when migrating from HDD to smaller SSD (considering fragmentation, mostly)?

I own a mid 2010 6,2 MBP and I am considering the upgrade to a SSD. I would probably get a 256GBs SSD and replace my optical drive for the older HDD, so I can have a little more of capacity, as I ...
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1answer
2k views

About This Mac Shows 43 GB of Backups, Disk Inventory X Shows 0 GB, Need to delete Backups

Currently in About This Mac, I'm seeing 43.05 GB of 128.47 GB of Backups. However, in Disk Inventory X, I do not see these backups: I want to delete these Backups as I do not need them anymore, ...
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3answers
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How does OSX assign disk numbers?

I have four drives inside my Mac Pro. Bay 1: /dev/disk1s3 Bay 2: /dev/disk0s2 Bay 3: /dev/disk2s2 (also, my boot drive) Bay 4: /dev/disk3s2 and /dev/disk3s3 How are the disk numbers assigned? If ...
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0answers
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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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2answers
174 views

iBook G4 opening procedure (for hard disk replacement)

I am about to replace the hard disk of an iBook G4 (a 12" 1.33 GHz model) with a SSD. The guides I find online, such as this one, describe a rather long procedure where both the bottom and top covers ...
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2answers
58 views

What is the /data/db folder in OS X?

I'm using OS X 10.6.8 and cleaning up my almost full hard-drive using the free tool Disk Inventory X. I stumbled upon the /data/db folder which weighs more than 600Mb. Before deleting some of its ...
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3answers
945 views

External hard drive frequently ejects itself when using Aperture

I have a brand new external hard drive which frequently ejects itself on a regular basis (every ~20 minutes or so), seemingly only when I have Aperture open (my Aperture library is located on the ...
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1answer
578 views

Macbook won't boot, possibly HDD issue

I am posting this for a friend who is having this problem but obviously can't post this himself as his computer will not boot up. He started having problems after a video game crashed during online ...
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2answers
9k views

Can't unmount the disk during Mac OS X install

My MacBook started to get really slow recently. Now it can’t start up properly anymore. All I see is the Apple logo and then it shuts down. I've tried rebooting multiple times, but I've seen the same ...
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580 views

Mid 2009 MacBook won't recognize [any] hard drive

My MacBook had been acting fine. I applied the latest update to Mountain Lion and closed the lid. When I opened the lid, it wouldn't wake from sleep (dark screen with whirring fan for ~5mins). I held ...
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Is / always the path of the system drive?

I need to know which drive is the System drive. Is it safe to assume that / is always the system drive ? Or in some situation (for example booting from a FW drive) / is not the drive were the system ...
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Can't access USB hard drive plugged in to Time Capsule

I have the most recent 2 TB Time Capsule to which I connected (via USB) a 1.5 TB Seagate hard drive. I expect the hard drive to be visible under "Shared", but nothing appears, except the Time Capsule ...
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245 views

Can hard drives have their own sleep settings?

Is there a tool that will allow me to set the sleep settings on a per-drive basis? I've recently done the optibay mod on my MBP so I have an HD+SSD setup and I'd like to be able to make the magnetic ...
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1answer
186 views

Move Large, Frequent files closer to center of HDD

Is there a native/third-party utility (or native trick) to move large, frequently-used files closer to the center of the disk? I was under the impression that the OS tried to automatically optimize ...
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1answer
1k views

Dedicated SSD/HDD to install Windows on a MacBook

So I have a Late 2008 unibody MacBook. I recently bought a caddy to replace my optical drive with so I can fit a secondary drive in the laptop. I have a 256 SSD in the main and a brand new 128 SSD to ...
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1answer
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Windows Server 2012 (or 2008) on a Mac mini

I understand Windows Server 2008 (and presumably 2012) works with Boot Camp. But I am wondering if it will be able to access the second hard disk in the Mac mini server. Can a Boot Camp Windows use ...
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1answer
342 views

Will FileVault reduce the power of my hybrid SSD+HDD?

I have a MacBook with a Momentus XT hybrid SSD+HDD drive. It have a 500GB HDD plus 4GB SSD which, as I could check, it uses as a cache for read operations. It uses some kind of black magic to ...
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3answers
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Why is my hard drive still full after deleting files?

I'm new to Mac. I have deleted many files from my applications folder, downloads, music, etc. to make clean Mountain Lion installation. After installing Mountain Lion I can still see in About This ...
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1answer
195 views

Hard drive defect? Help me recover my music!

I've an old iPod Classic with 80 GB of Storage, suddenly it stopped showing any music. I can still access the files on it (with Windows Explorer). Copying all files is possible but it stops at a ...
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1answer
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Macbook Pro early 2012 SSD retire block count

I've recently bought an OCZ Vertex3 480 GB SSD (VTX3-25SAT3-480G) for a drive upgrade. This is what I did after I purchased the drive: Backed up my system with Carbon copy cloner Installed the SSD ...
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1answer
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Where are notes stored in Mountain Lion

I ha a hard drive that died recently in my macbook, I've replaced the hard drive etc so no issues there. Unfortunately, it appears I wasn't backing up the notes app to iCloud, and I really need to get ...
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2answers
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JDiskReport is damaged, can't be opened

I have tried downloading and running JDiskReport 1.4 a few times now, and after unzipping it and clicking on the executable I get the message: "JDiskReport" is damaged and can't be opened. You ...
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1answer
259 views

I replaced my Superdrive with a second hard drive, and now I've got spin-up/down issues

I've purchased a bracket to replace the superdrive in my 2009 Unibody MBP, the kind with the latch that pops open rather than the entirely screwed down bottom panel. Now that I've put in my second ...
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1answer
7k views

Does Time Machine need a “clean drive”, or can I use an old hard disk

I want to use Time Machine on my Mountain Lion. I have 1TB external HDD I use for storing various stuff. The thing is I selected the drive for Time Machine to work on but nowhere it is mentioned ...
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1answer
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What does “DOE compliant” mean in Disk Utility?

When erasing a drive with Disk Utility, you have a couple options. An insecure wipe, a single pass of zeroes, a "DOE-compliant" 3 pass, and a DOD (Department of Defense) 7 pass. DOE doesn't stand ...
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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
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MacBook Pro flashing question mark but I can't repair because hard disk not found in disk utility

Today my MacBook showed up some wheel of death and I waited and waited and then after a long time (10 minutes) decide to force shutdown. Ok, I know its not a good idea but I've done this before and ...
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2answers
3k views

Mountain Lion Installer detects hard drive damage

I downloaded and ran the Mountain Lion Installer today for my mid-2007 iMac. After rebooting and preparing to install, I receive an error message that the hard disk was damaged and the installer could ...
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1answer
838 views

How can I mount disks via cron in Mountain Lion?

Is there a way to mount disks in Mountain Lion that works with cron? The following command works fine from the Terminal: /usr/sbin/diskutil mount disk1s6 But when executed via my crontab, it ...
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3answers
358 views

Exact clone of HD

I managed to broke something on my iMac's internal HD. I have now done a successful restore using DiskDrill, but just in case I want to make an exact copy of the internal HD. Not just some partition, ...
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480 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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4answers
4k views

How to recover data from unreadable hard drive?

I have an 80GB Fujitsu 2.5" hard drive that died about a day ago and had nothing backed up. Is it possible to retrieve data off of it somehow.
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disk copy software, imperfect disk

I didn't find this question, but if it is here let me know. I have a problem disk. I want to copy as much as possible from it before I scrap it. But there are many thousands of files, so manually ...
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How to partition an SSD that fails with error 69888 - couldn't unmount disk?

I erased the SSD drive in my MacBook and was reinstalling Lion when it failed about 75% through the install. Now in Disk Utility, sometimes I see the SSD drive and sometimes I boot and it's not there ...
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How to re-encrypt a decrypted partition that says “The Core Storage-targetvolume is already encrypted”?

I encrypted a Lion partition called "Storage" and it worked perfectly. I needed to decrypt it momentarily because I had some issues, but now I want to encrypt the same volume again and it says "The ...
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HD accidentally reformatted to MBR, how to get back to GUID?

So in trying to create an MBR partition of my hard drive which I could then use to boot a solaris-derivative OS using rEFIt, I messed up. Rather than a hard drive with a primary GUID partition map ...
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How to recover deleted files from OS 10.5.8?

I'm not very experienced with Macs, so please pardon my mistakes. I'm assisting a coworker with a client of ours who recently let go of one of their employees, and in the resulting meeting the person ...
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3k views

Are there any wireless hard drives work well with Lion or newer Macs?

Are there any wireless hard drives to use with a mac? I need to copy paste files from and to this hard drive, when the disk on my mac is full. Do I need to look for a specific Apple drive or will any ...