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

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158 views

Extremely slow write speed to encrypted 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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139 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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29 views

Is there a way to change order of physical disks in Corestorage

I upgraded existing system to a "Fusion drive" - corestorage volume - consisting of existing 300GB HDD and new 120GB SSD. Instead of creating a new corestorage drive I went with the route of ...
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35 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? Thanks!
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127 views

How to comprehensively benchmark SSDs on OS X?

I want to benchmark my SSD under different circumstances. Connected through USB3, Thunderbolt and internally (S-ATA). Unfortunately I can only find benchmarks which concentrate on measuring read and ...
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82 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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296 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 ...
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211 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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343 views

CoreStorageFamily::unlockVEKs() failed to unwrap the vek, status = e00002bc

I have a filevault2 disk with two partition. One is the boot partition, the other contains data, both are encrypted. Today, after installing the latest 10.8 update (10.8.4 I guess), the computer ...
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265 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 ...
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169 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 ...
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142 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 ...
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225 views

Unable to create a DIY Fusion Drive using a 3 TB hard drive

I'm trying to make a Fusion Drive with a Samsung 830 256GB SSD and a 3 TB 3.5" HDD (connected via SATA to my late 2012 Mac mini). I'm able to create the Fusion Drive, but when I start to install ...
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494 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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42 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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722 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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35 views

Configuring SSD over-provisioning on Mac OSX

I'm in early investigation stages of adding a SSD drive to my MacPro. Fragmentation problems can lead to serious performance problems on an SSD. There are a couple answers to this problem: TRIM - ...
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12 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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17 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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22 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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17 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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23 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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160 views

My MacBook Pro mid-2010 won't recognize new hard drive

I was forced to change my HD since the old one gives me I/O error on boot. I bought a Western Digital Blue WD5000LPVX, connected by USB to another Mac and format it using Mac OS Extended (Journaled) ...
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40 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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42 views

How to get Mac App Store to stop thinking app is installed on external drive?

I ran into a problem where the Mac App Store said that a particular app (Numbers in this case) was up to date, but whenever I launched it I would get an older version. I finally did a search across ...
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24 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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26 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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31 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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52 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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14 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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23 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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72 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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1k 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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256 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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272 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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350 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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124 views

How do I temporarily relocate my Time Machine backup files

I have a 1TB WD My Passport external hard drive that I've been using for Time Machine backups. I recently had an issue with it where I can't save to it anymore because it was corrupted. The way to fix ...
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323 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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2k 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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233 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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151 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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420 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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667 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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213 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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1k 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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260 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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218 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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295 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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361 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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176 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: ...