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

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708 views

Disable USB Write Caching by default

Is it possible to change OS X's USB filesystem mount behaviour to use the noasync flag to disable write caching? The aim here is to allow USB devices to be safely removed without eject or hdiutil ...
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25 views

2 Disks with the same name, how do I delete one?

I initially boot-camped a disk into a windows partition, and wanted to delete it. Initially I thought formatting it to free space would work, but it didn't. I tried again and accidentally formatted it ...
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267 views

Unable to install OS X Lion on Macbook Pro's new internal HDD

The model I'm working with is a Macbook Pro A1278, Early 2011 design. This belongs to a friend, whose current drive, a 500GB SATA III which came with the laptop, was shown to be in poor health, having ...
3
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0answers
55 views

Are repeated FileVault-related harddrive problems a signal that I have greater hard drive problems?

I found a great answer in the forums for an incorrect block count/invalid free block count problem that Disk Utility diagnosed when logged in but couldn't see in Recovery HD mode. Turning off ...
3
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0answers
293 views

Mac Mini 2013 wakes immediately after sleep when USB drive plugged in

I have a 2013 mac mini running osx 10.9.3. I used to be able to send the machine to sleep by going to the apple in the menubar and choosing sleep. After a recent update, when I do this the displays ...
3
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861 views

Time Machine and case-sensitive HFS

Time Machine defaults to formatting a new drive to Journaled HFS+ (case-sensitive), if you set up the drive from within Time Machine itself. However, my main drive (the one Time Machine will be ...
3
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6k views

Macintosh HD missing after failed catalog btree rebuilding

There is an I/O error in the hard disk in my MacBook Pro running Mountain Lion and as I start it up, a progress bar fills up and then it shuts down on its own. I attempted to recover the files in ...
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1k views

Can I enable AHCI mode of the SATA controller when booting to Windows on a MacBook with Nvidia chipset?

Is there a way to enable AHCI mode under Windows on a Macbook5,2 (white) on N-Force 730i chipset? If you want to just say 'no', please put it in the comments instead. Thanks. Advanced Host Controller ...
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99 views

Hidden files taking up hard disc space?

I’ve used DaisyDisk to analyse my file usage on my MacBook Pro (mid–2012), but the numbers aren’t adding up. Of 500GB, it shows ~425GB used, but the breakdown only adds up to 280GB. The diagram itself ...
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24 views

CMD+R wil not start Recovery HD - Fusion Drive

I have recently my Macbook Late 2009 with a SSD crucial 500Mo (Data doubler). I made a Fusion Drive with no problems, then I re-installed el Capitan again with no issue (except I tried to re-install ...
2
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87 views

Why my Mac is showing only 250 GB out of 500 GB?

I have MacBook Pro (13-inch, Mid 2012) It comes with a 500 GB hard but today when I checked it it's only showing 250 GB. Please tell me why is that? Macintosh HD: Available: 81.57 GB ...
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258 views

Fixing damaged hard drive after OSX update

I recently tried updating my Macbook Pro Retina to OSX El Capitan, however believing this to be a simple routine update, I did not backup my computer. Of course, the update was unsuccessful, somehow ...
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76 views

Hard disk corrupt twice in 24 hours

My Macbook Pro 13" (2011) had a Seagate 1TB hybrid drive installed as a secondary drive some 4 months ago. Yesterday the volume somehow became corrupt and unable to mount. I managed to format it using ...
2
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0answers
62 views

Move single user Time Machine backup drive to OS X Server

I have an external hard drive which is currently used as a Time Machine backup drive for a single machine. I'd like to move the drive to my Server machine and use it for network backups for all my ...
2
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0answers
82 views

Lost partition on WD 1.5 TB external drive

My 1.5 TB WD drive failed out of nowhere and now it shows up saying "The disk you inserted was not readable by this computer" This is how it shows up on Disk Utility This is what sudo gpt show ...
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0answers
166 views

Limit hard drive i/o usage by one process (Dropbox)

I'm using only 5% of 1TB given by Dropbox and it regularly chokes my Mac Mini's HDD by "Downloading file list" too often. I think it's just a poor performance (it started since the last Dropbox ...
2
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0answers
170 views

Can I keep my Boot Camp partition when moving to a larger hard drive?

I just bought a 512 GB hard drive to replace my 250 GB hard drive, which currently has a Boot Camp partition (pretty vanilla, just running a standard Windows 7 install). I was planning to just clone ...
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3k views

Disk Utility: Invalid Disk Label @ cksum mismatch

I have a WD external hard drive. I've been running the routine tests to make sure all my stuff is safe lately. In Disk Utility, I did Verify Disk on both the disk itself as well as the main partition, ...
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241 views

Does iCloud keychain stores FileVault passwords?

My MacBook Air drowned today and it was connected to an external hard drive encrypted with FileVault. I can't remember password for it. Will new Mac sync that password from iCloud or is the encrypted ...
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54 views

How to use Time Machine to back up a partitioned drive?

My MBP was originally a single SSD partition, which I backed up with Time Machine to an external USB HD. I created a new partition on the SSD for Yosemite, and am running the MBP on 10.10, although ...
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0answers
115 views

Is it possible to rename a logical volume group that's currently in use with bootable partitions that contain data?

I need to know if it's possible to accomplish this: http://apple.stackexchange.com/a/90821 but without having to wipe the drive. I added a new partition and installed another instance of OS X but ...
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0answers
367 views

Slow disk access time in fresh OS X installation

My apple-shipped disk on my frankenstein early 2011 MacBook Pro (with upgraded motherboard to 512MB GPU Memory) just gone bad and I have to replace it. I had replaced DVD drive with SSD with the old ...
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392 views

Why is cloning my MacBook Pro slower since I upgraded it to SSD?

Last week I replaced the 512GB 7200rpm HDD in my Mid-2010 MacBook Pro with a 512GB SSD (Crucial 550). The performance improvement in most areas is welcome, but one thing is now considerably slower: my ...
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35 views

Debugging Hard Drive Issues

My SSD system disk is apparently unmounting about an hour after booting, causing "drive is not configured" errors when trying to read any files, and the Spinning Beach Ball of Death. Disk Utility and ...
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0answers
74 views

how do I transfer my iOS developer profile to another computer because of hardware failure?

Is it possible to transfer my iOS developer profile to another computer if my hardware failed but the hard disk is ok?
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0answers
194 views

Broken FileVault Drive

I'm coming to you having a few issues with my old hard drive. Basically, my MacBook crashed a few days ago. It seems like my disk has some bad sectors and has started a kind of autodestruction ...
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853 views

Something appears to be corrupting my kernel.log file, causing 5-10 second lock ups. What gives?

The Problem: Lately, every 10 minutes or so, my MacbookPro8,2 has been freezing up for 5-10 seconds. During those 5-10 seconds, video/audio content stops playing, all applications lock up, and hitting ...
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0answers
812 views

How do I write-protect a partition of a USB drive on OSX that can work cross-platform?

I bought a bunch of USB sticks that I want to give as a gift to friends and clients, with some files on them. I'd like to have the files non-erasable (though I realise they can format the drive, I ...
2
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0answers
688 views

How to prevent “Incorrect block count for file” file system errors from occurring?

On our 10.7 Lion installation, 3 out of 9 drives are repeatedly suffering from Incorrect block count for file errors when running a diskutil repairVolume command. The drives are having ...
2
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0answers
296 views

OS X breaks if I apply HFS compression to the whole volume. What do I need to exclude?

OS X breaks if I apply HFS compression to the whole volume. (It won't boot.) What do I need to exclude? I've been able to compress large parts of it, but then I had to restore after I compressed ...
2
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0answers
1k views

Fusion Drive Setup: Possible to force the HDD to spin down as long as your reading from/writing to the SSD?

I'm considering to replace my optical drive in my MacBook Pro with an SSD. When using it as separate Volume, the advantage is that you can spin down the HDD, thus reduce noise and first and foremost, ...
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0answers
871 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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0answers
47 views

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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0answers
203 views

MacBook Pro disk failure

Just a few months ago, I bought the latest 2011 MacBook Pro. Now, a few months later, I have a problem. It seems like my notebook is rejecting my hard drive (which is an SSD). How it all began: ...
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21 views

El Captan disk utility did not see erased partition after fail bootcamp install

I try to get my full drive after fail a bootcamp install of Win. Now I have removed extra partition from my fusion drive, but can’t see empty space using the el captan disk utility. Using shell, ...
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35 views

My partition is using negative space. Should I worry?

As you can see, according to Disk Utility, I'm using negative space in /dev/disk0s7. This is obviously incorrect, however, I am slightly worried as to what this may mean for the partition's effects ...
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81 views

How can I repair hdd using Disk Utility if First Aid options (Repair, Verify) are all greyed out?

Would really appreciate any help in fixing an external drive so can use with my Mac again. I had a power loss & when computer rebooted it was unable to see the attached Freecom 320Gig Hdd (FAT32 ...
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16 views

MacBook Pro running slowly: do occasional input/output errors on a ditto transfer suggest it is the hard drive?

I was pulling files off of my Daughter's Macbook Pro using Target Disk mode and saw ditto reported input/output errors occasionally. I'm talking just about 40 errors total in all of the 250 GB of ...
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20 views

iMac partition grid screwed. Please help?

So yeah i guess i screwed up my iMac 5k retina's (late 2014) partition grid big time and i need your help. It all started yesterday when i tried to format my computer. I'm selling it tomorrow, that's ...
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27 views

Large Library/Containers directory

The directory ~/Library/Containers has size 39GB on my system. This is huge. I guess that the directory contains some files created by running various apps. So the more applications I use, the more is ...
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0answers
73 views

Fusion drive suddenly not bootable: “Too few free segments”, made read-only

I've dealt with a lot of disk issues over the years admining lots of different OSs, but this one is new to me... help/ideas appreciated before I give up and restore! Woke up this morning to my iMac ...
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0answers
36 views

Cannot Repair Macintosh HD, after loading into OSX, it become a [X]

When i restart the computer and loading with the apple logo, wait for few second, and the apple icon become [x] My Mac is OSX EL Capitan (v10.11.3) I used Disk Utility "First Aid" and found that ...
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23 views

How to purge all Xcode temporary data?

Is there a tool or method to purge all unnecessary Xcode temporary data? Xcode seems to be creating files each time you build an app or run it with the simulator. I'm not sure what I can delete ...
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0answers
33 views

Rsync for backups

I have gotten into the habit of using rsync to do my own backups of an encrypted volume containing my personal info onto an external hard drive. I did not use Time Machine, because I do not own the ...
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0answers
25 views

Finder copying dialog freezing from time to time during transfer

I'm trying to backup 2tb drive I have connected to my mac to another drive using this enclosure via firewire 800: http://eshop.macsales.com/item/OWC/M3QX2KIT0GB/ The problem is that from time to time ...
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43 views

Time Machine Partition gone from external hard drive, can't repartition

I've got a 1TB external drive which used to have two partitions: One formatted in NTFS to share files between Mac and Windows, and one for Time Machine Backups. I haven't used it in quite some time. ...
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127 views

Error installing OSX El Capitan

I am trying to install OSX El Capitan in a Mac Mini but I get the error: OS X could not be installed on your computer! A disk with a mount point is required Quit the installer to ...
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52 views

diagnose possible issue with MBpro 2012 running very slow

tl;dr Can a MacBook Pro become unbearably slow because of hardware issues, e.g a hard-drive failure? How can I best diagnose this? I own a MacBook Pro from 2012, which recently has become unbearably ...
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55 views

HD fine, SATA cable fine, but MBP internal won’t mount/boot

I’m looking for some advice regarding a specific problem with a MacBook Pro mid-2009 running the latest version of El Capitan. The basics follow, but I have shared details of the troubleshooting ...
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37 views

Is it possible to use diskutil to manipulate the read/write buffer of the SSD portion of the fusion drive?

Has anyone been able to use diskutil to manipulate the Core Storage LVM into increasing the size of the read/write buffer of the SSD? Currently the Fusion Drive keeps 4 GB free for new reads/writes. ...