Questions tagged [hard-drive]

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

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5
votes
2answers
58k views

Can Recovery Mode install OS X onto a blank SSD?

I want to install a new Solid State Drive (SSD) into the Mac. Can I just build in the SSD, start the MacBook in Recovery Mode and install OS X from there on? After reading a lot on the internet I ...
17
votes
3answers
34k views

How do I clear the purgeable area on my disk?

I cleared space on my disk by deleting files and emptying trash. But, I am unable to make use of the space that I freed up. That is, as you can see the disk reports 142 GB as Available with 83 GB of ...
9
votes
4answers
70k views

I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp)

this is a somewhat similar post to this one (Can't create partition on free space with Disk Utility) but not quite... It started with me creating a BootCamp partition (around 145 GB) for Windows ...
13
votes
1answer
8k views

Disable the disk check when reconnecting an improperly disconnected disk to OS X

If you disconnect a removable drive without ejecting it first, the next time you connect it, Windows or Mac run an fsck check on the disk to ensure data integrity. Windows will ask if you want to ...
3
votes
1answer
4k views

HFS+ invalid number of allocation blocks

Okay so a few days ago I wanted to install Ubuntu GNOME over regular Ubuntu and it gave me the option to automatically overwrite my Ubuntu installation (that I had on a separate partition from my OS X ...
3
votes
1answer
1k views

New SSD problem

I've just installed a new SSD replacing an HDD in my old (late 2008) iMac. When I switched it on all I got on screen was a question mark. On the advice of my son I tried cmdR during switch on with ...
3
votes
1answer
3k views

Macbook Pro hard drive failing?

I'm trying to figure out if my Mac's hard drive could be failing, or that it could be some other component or the HD cable. After transporting my Mac about a week ago it started beachballing a lot. I ...
106
votes
6answers
354k views

Is it safe to delete ~/Library/Caches?

Is it safe to delete the file Caches, in the Library of the Mac OS X Hard Drive? It's a pretty big file, 3.56 GB, Caches reminds me of logs i don't need or browser cookies. Is it safe to delete the ...
59
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2answers
80k views

What is com.apple.bird? Why does it grow so big?

When trying to clean up their hard disk, some users discover ~/Library/Caches/com.apple.bird is pretty big, sometimes in the order of many gigabytes. What is it?
5
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3answers
4k views

Recover deleted Encrypted OS X Extended volume

I accidentally formatted an external 1TB HD to FAT file system using Disk Utility in Mac OS. The disk used to be HFS+ encrypted. Encryption was done when I created the OS X Extended partition, not ...
53
votes
7answers
10k views

Do Macs need to be defragmented?

I don't see any application to defragment my Mac (running OS X). Is defragmenting not necessary for Mac OS X? If so, why not?
27
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3answers
144k views

USB Drive Will Not Mount, Not Listed in Disk Utilities, but Found In System Profiler

I have a Seagate FreeAgent Go drive with the optional docking station. I use it to keep files that I don't access on a regular basis and as a place to do "quick backups" of things like my Paperless ...
13
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1answer
6k views

Replacing SuperDrive with secondary storage?

I'm familiar with the OWC Data Doubler, a kit which allows you to remove your Macbook's SuperDrive and replace it with secondary storage. What alternatives exist for this product? A complete answer ...
9
votes
9answers
57k views

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 ...
6
votes
1answer
7k views

How to fix GUID hard drive corrupted to MBR

I am on OS X 10.9.5 with a late 2013 iMac. I have a 3TB hard drive that has an unusual problem. It is a Western Digital 3TB Red WD30EFRX. I formatted it with two partitions, both 1.5TB. One was a ...
5
votes
4answers
3k views

iMac won’t boot up from internal drive but can boot from external drive, but internal drive can boot other Macs

I am seeking suggestions on what may be going in with an iMac I am currently troubleshooting, as it’s displaying behaviour I do not recall seeing before. Short story This iMac refuses to boot up. It ...
67
votes
6answers
98k views

How do I get detailed SMART disk information on OS X (Mavericks or later)

I'm trying to get a detailed SMART status report on the drives in my Mac. I'm not talking about "Verified," I'm talking about the detailed report that's about 100 lines long listing all the vital ...
8
votes
2answers
7k views

How to fix Disk Utility, About This Mac, and Finder that disagree on hard drive space usage?

Has anyone seen this issue and know how to fix it? Look at the free space reported by running "Get Info" on my hard drive (Macintosh HD) in the Finder, "About This Mac" from the Apple Menu, and Disk ...
9
votes
4answers
14k views

How to control fan speed in macOS Sierra?

After replacing the hard drive in my 2009 iMac 27", I noticed that the hard drive fan spins at maximum speed since the sensor cable is not plugged in. (The new SSD drive doesn't support it) To solve ...
6
votes
1answer
3k views

Large difference in reported free disk space

I have a strange discrepancy in the amount of free disk space that's being reported. The finder says: My iStat Menus says: Which is the same as df -h reports: remco@Prosperpine ~ $ df -h ...
3
votes
1answer
10k views

Partition type suddenly FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF, drive unmountable

I have two drives inside my MBP, an SSD for the OS and the original HDD for large Data. The HDD has 3 Partitions: My Data (Core Storage volume) 20Gb for Linux 4Gb for Linux Swap Recently I ran ...
14
votes
3answers
26k views

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 ...
24
votes
9answers
95k views

External Hard Drive Won't Mount

I've searched and tried a lot of stuff but still can't get it to work. I was able to use my seagate HDD properly last week but now it doesn't mount. I tried plugging it to a PC & another mac, it ...
23
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3answers
126k views

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 ...
19
votes
4answers
26k views

How can I merge primary APFS partition with other empty APFS partition?

Using the latest Macbook Pro with currently High Sierra 10.13.1, I was using bootcamp for a year, and I decided to get rid of the Bootcamp partition this morning. The Bootcamp utility would not let me ...
12
votes
4answers
2k views

What are some tips for replacing my MacBook Pro hard disk with SSD?

I would like to replace my MacBook pro hard disk with an SSD, without reinstalling everything. I am looking for your experience on good SSD drive models that have good performance at a fair price the ...
19
votes
3answers
43k views

How to get the “securely erase” function of Disk Utility on El Capitan & Sierra

Up to Yosemite I regularly used Disk Utility with Erase > Security Options... > writes a single pass of zeros over the entire disk... as a simple method to fully check that a disk is fully safe before ...
8
votes
4answers
12k views

Disable mounting Internal Macintosh HD at boot [duplicate]

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 ...
6
votes
4answers
26k views

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 ...
5
votes
1answer
9k views

Resizing dual boot partitions in Yosemite

I have a dual boot Macbook Air with Yosemite and Ubuntu. I would like more space on my Ubuntu partition and need to therefore reduce the size of the Mac partition. I assume this will cause some damage ...
4
votes
2answers
6k views

Finder Reports Disk is Full, Other Tools Don't Account for it

I looked at some of the other Q&A here and didn't see a duplicate of this one (e.g., How can I figure out what's slowly eating my HD space? and other linked and related questions). Finder reports ...
1
vote
1answer
151 views

FFFFFFFF problem with hybrid partitioned drive, not able to fix with the guide in other topics

Like many other uses who reported the same problem, I tried to install and delete Ubuntu in my 13' mid-2014 MBP, messed up and got FFFFFFFF-FFFF-FFFF-FFFFFFFF partition, tried to follow the solutions ...
1
vote
3answers
2k views

After update, now I'm getting “Disk not ejected properly” every time my Mac sleeps

Been running El Capitan since it was officially released. Updated to 10.11.4 a few days ago. I have a WD Elements USB 3.0 drive connected to my Mac mini (directly to the rear ports, not via a hub). ...
0
votes
1answer
107 views

How to test hard drive - diskutility reports defective drive as perfectly fine

long story I have an USB drive to copy data between Mac, Windows (personally I don't own any) and PS4 - it is exfat formatted. Recently I noticed my Mac would freeze when I plug in this disc - also ...
53
votes
9answers
57k views

Time Machine ridiculously slow after El Capitan upgrade

I recently updated to El Capitan, and told Time Machine to backup. It got stuck on Preparing Backup for hours, so I stopped it, deleted the InProgress file, rebooted and tried again. After ~30 mins, ...
24
votes
7answers
92k views

What is the best way to clone a disk between two Macs?

What is the best way to clone a disk between two Macs? I ask this every couple years or so and every time I get the same answer. "Use Carbon Copy Cloner", they say. But the unfortunate fact is that ...
12
votes
2answers
29k views

How can I get Automator to mount a network volume?

I am writing an Automator "script" that rsyncs media on my 10.6.3 MacBook Pro to my Ubuntu 10.10 HTPC. I can make Automator run my shell script for rsync commands, but I can't make Automator mount the ...
21
votes
9answers
221k views

Unable to format / erase hard drive

I have an external HD that died on me a while ago and I'm trying to see if I can format / erase it to start using it again. The disk does not show up in Finder but I can see it in Disk Utility. When ...
8
votes
7answers
45k views

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 ...
13
votes
9answers
376k views

How do I get an operating system onto a new hard drive?

I will be installing a new 500GB hard drive in my macbook. It is a late 2008, aluminum, 13-inch screen. Once I install it, how do I get an operating system that's 10.7 or newer (downloaded from the ...
11
votes
2answers
13k views

Is File Vault 2 whole disk encryption or whole partition encryption?

Can I use File Vault to encrypt only some of the partitions on my disk (so that I can still have unencrypted and Windows partitions on the same disk), or does File Vault encrypt the whole disk so that ...
18
votes
3answers
37k views

Why is a secure erase 'not necessary' for SSD's?

I'm about to trade in a 2010 MacBook Pro with an SSD. However, I'm unable to do a Secure Erase from the recovery disk (as I used to do with mechanical hard drives before selling or giving away a ...
11
votes
4answers
103k views

What is the best free hard drive diagnostics app for Mac OS X?

My MacBook Pro (described below) fell 5 feet while it was powered on. Would the sudden motion sensor be able to turn off the hard drives in time? Also, can anyone recommend the best (free) hard drive ...
3
votes
2answers
6k views

MacBook SSD replacement — sudden motion shock sensor in optical bay?

When looking to upgrade a MacBook Pro with a solid state drive (SSD), one option is to: First, install the SSD instead of the spinning hard disk drive (HDD). Then, install the HDD instead of the ...
2
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4answers
8k views

Trouble with SSD/HDD in Macbook Pro Mid 2009

When my original HDD crashed I wanted to change it and choose a Samsung HDD (I don't not the exact model anymore). The problem with this one was that the system often hanged for several seconds until ...
5
votes
2answers
4k views

Issues with installing SSD instead of DVD drive?

It is common to replace a MacBook Pro's hard disk drive (HDD) with an solid state drive (SSD), however, that may pose a threat to the HDD if installed in the optical bay instead of the SuperDrive.* ...
12
votes
2answers
5k views

How do I not accidentally eject external drives?

I have a Mac Mini with a few external drives connected that I use as a home server. Normally the Eject buttons next to the drive icon are really handy as they let me eject an external drive very ...
9
votes
2answers
798 views

How can I move my data to the new harddrive?

So I am planning to upgrade my Macbook pro's harddrive to a SSD. I don't know much Mac OS X tools, so I was wondering if anyone could let me know how I can copy my entire harddrive (including OS) to ...
14
votes
3answers
9k views

How can I disable the 2nd hard drive in my 27" iMac?

I have an 2010 27" iMac with an SSD and a regular hard drive. Now that I've been using the machine for some time and have not come close to filling the SSD, I'd like to disable the spinning hard drive ...
4
votes
1answer
5k views

Resizing Mac OS partition - macOS High Sierra

Hi I am having issues trying to resize my Mac OS partition, I previously had a very large recovery partition almost 100gb as a result of removing my linux installation, I since resized this to 650mb. ...