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

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Monitor disk activity per volume without third-party software

I have many disks/volumes connected to my OS X system. I want to monitor, in real-time, read/write speed for each volume. OS 10.9 activity monitor shows only the cumulative numbers for all volumes, ...
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118 views

Can i install OS X from FROM external hard drive to internal hard drive

My hard drive is failing so I put in a brand new 500gb hard drive in my macbook 2008 white 13". I have a retail disc of Snow Leopard but the install keeps failing over and over again. Ithangs at 29 ...
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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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51 views

External hard drive un-mounts and mounts itself

I have a Seagate external hard drive formatted to HFS+ that won't stay mounted for more than a couple of seconds however then mounts itself again only to unmount itself again and this keeps happening ...
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1answer
30 views

Can I move a volume from one computer to another in Time Machine?

I am slowly migrating from an older Mac Pro to a MacBook Air. Both machines are backed up to two different 2TB drives using Time Machine. Recently I decided that I wanted to make the extensive data I ...
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1answer
736 views

MacPro Hard Drive 3 TB or Larger formatted to Logical Volume Group by Disk Utility

I have an Intel MacPro in which I recently installed a new internal 3TB hard disk. I attempted to format it in Disk Utility using the standard GUID partition map and encountered a strange problem. ...
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65 views

Cannot boot Mac Mini with stripped RAID -fsck hangs

Today we coould not get one of our machines running. After several hours of doing the 'standard' tasks like fixing permissions etc. we hit a dead end. Here's what's going on: Machine starts, we can ...
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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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55 views

Cannot erase and reformat Mt Lion on Mac Book Pro

I am trying to erase and reformat my mac book pro. It has mt lion installed already. I have a usb w mt lion ready to go. When I go through the erase steps in the disk utility, the erase button ...
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1answer
66 views

MacBook will read USB drives with no problem, but will not see the USB drive as boot drive

I am trying to install OS X Lion on a Macbook 4,1 which I've upgraded to 4 GB of RAM. It should support this OS, however I cannot get my Mac to see the USB drive as a bootable option. It's a SANDISK ...
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2answers
203 views

There is about 60GB of space being used on my HD that I cannot find

Am I just bad at math? OmniDiskSweep isn't picking up what is using my space. I recently deleted a 60GB drive (not partition) that VMWare Fusion was using, and emptied the trash. Now it doesn't show ...
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2answers
52 views

Can Super Duper perform “smart update” from SSD to HDD?

My goal is to create a bootable backup of my SSD boot drive on an external HDD. I'm using a Mac Pro mid-2010, so I can swap out the boot drive should my SSD ever get corrupted. Is there any reason ...
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441 views

A flashing folder with question mark

I have a rather strange problem with my MacBook Pro (13-inch, Late 2011). Whenever I start my computer I see a flashing folder with a question mark. I know this is supposed to be a common problem ...
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2answers
92 views

How to find file system of external hard drive?

I have plugged external hard drive. It does not show in Normal Mode. I can see its Type Name and Identifier thru terminal. I want to find the file system of the external hard drive. I want to format ...
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177 views

2nd HDD in Early 2011 MacBook Pro ejects during large file transfers, but only in OSX

I recently installed a 1TB HDD in my early 2011 13" MacBook Pro using an MCE Optibay. The stock 120GB SSD houses an OSX Mavericks install and a Windows 7 install, done basically via Bootcamp. The 1TB ...
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3answers
83 views

Set a Volume's permissions to group write for all files and folders

To me this seems like it should be easy but I'm having a hard time finding a very good answer that seems definitive to me. I have a I have a hard drive mounted that my wife and I share (internal ...
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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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2answers
1k views

What would be a good SSD drive for a MacBook Pro mid 2010?

I'm thinking about updating a bit my Macbook Pro mid 2010 adding to it 8Gb of RAM and maybe a new hard drive, a solid one (SSD) of probably 240Gb. Which SSD would you recommend me? I'm looking for ...
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1answer
51 views

Setting Up Raid iMac

I have one lacie 2big thunderbolt 4th unit setup as raid 1. I want to add a lacie 2big thunderbolt 4th unit. How do I get it set up so the entire unit 1 is mirrored onto unit 2(Raid1)?
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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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2answers
255 views

Which format for external disk for performance?

I'm using OS X Mavericks and just got a new external hard disk. I don't need to share it with a PC (so no need for FAT) but I do want it to have better I/O performance. I'm a bit confused by the ...
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1answer
549 views

Recover Deleted Files on Mac OSX [External NTFS]

I have accidentally deleted some files on my Mac OS X Mavericks. Actually, I was trying to burn an .img file to my flash drive which was located at /dev/disk1 (at the same time I had connected a NTFS ...
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1answer
104 views

Rebuilding Fusion Drive

I have a Fusion Drive (10.9.1) with a 256GB SSD and a 1TB HDD. The 1TB HDD has started making noises and has reported SMART errors. It is apparent that it will fail any day. I have Time Machine ...
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2answers
509 views

macbook doesn't recognize internal HDD, only when connected via USB

yesterday something weird happened. After my 13' macbook pro ( early 2011 ) was running all night while playing music, in the morning I just closed it and went home from my friends house. When I got ...
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13 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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35 views

On external drives

When I shop for third-party external hard drives I'm struck by how much more expensive the drives that are advertised "for Mac" are, when compared to those without such qualification. My question is: ...
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79 views

SSD in mid 2011 mac mini

I was thinking about upgrading my mac mini mid 2011 with an ssd, following i-fixit guide. in the mid 2011 do I have enough space for an SSD + HDD configuration using the mounting kit provided by ...
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3answers
3k views

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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1answer
61 views

MacBook currently has quiet SSD, will adding extra HDD cause constant noise?

My MacBook Pro has an SSD drive that runs silent, which is really great. I am considering removing the SuperDrive, moving the SSD to the optical bay, and adding a 7200-RPM regular HDD in the main ...
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163 views

My external hard drive is full, now I can't mount (or see) it

First off, I'm using a 3TB western digital external hard drive with a mac-mini running Mavericks osx. I was backing up a lot of data to my external hard drive, and then I went away for a few hours. ...
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2answers
197 views

Time Machine - multiple backup destinations for a “separate weekly”

I have a client that I'm setting up Time Machine to backup his Macbook Pro. He's running OSX Mountain Lion, but soon to upgrade to Mavericks. It has been backing up using Time Machine and an ...
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1answer
1k views

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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1answer
32 views

Removing OSX without deleting media files

I have two drives on my Mac, Macintosh HDD (Mountain Lion) and Macintosh SSD (Mavericks). I recently installed Mavericks on Macintosh SSD. I still have Mountain Lion installed on Macintosh HDD along ...
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1answer
1k views

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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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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1answer
636 views

Partition corruption, still can see files in single user mode, would like to retrieve files

The problem started after forcing the mac to shutdown. Since then, when trying to boot, it stays stuck at the grey apple with spinning wheel. I've tried a few generic things to be able to access my ...
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2answers
35 views

Deleting files requires password and doesn't increase free space [duplicate]

I've been using my Mac for around 2 years, and 3 years overall with uni. I keep deleting files. When I do this, it comes up asking me to confirm my password that would normally come up after logging ...
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2answers
125 views

Discrepancy between availble space and capacity on external HD

Disk Utility report (Consistent with Finder) Mount Point : /Volumes/partition2 Format : Mac OS Extended (Journaled) Owners Enabled : No ** Number of Folders : 10 Capacity : 1.9 TB ...
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82 views

escape the target mode

I tried to install Windows on my Mac Pro but it failed because my disk needed to be repaired; it was suggested that I hold cmd + r during a restart. I tried that but when it restarted I was showed a ...
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1answer
56 views

Will heavy duty testing and development cause my MB Air's SSD to crash soon? How to prevent it?

I just recently bought a MacBook Air 2013 (i7 with 8GB RAM and 128GB SSD drive). I am a programmer, and my daily jobs would involve a lot of testing on that machine, including setting up databases, ...
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2answers
106 views

TimeMachine inconsistant with backed up data. How do I access earlier data from the backup - they ARE there, Time Machine just doesn't show them

This is a bit difficult,. I will try to explain in detail, please excuse if it get's a little long. Outlook 2011 crashed, and I was advised to reinstall. That was a mistake, all my local folders in ...
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98 views

Reduce impact of Disk IO on performance

I've never found that OS X has been exemplary at handling responsiveness under Disk IO, but Mavericks has made it so bad that I've been barely able to use my machine whenever a backup kicks in. ...
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2answers
187 views

Time Machine is Frozen

I am running Mac 10.8.5 on a 2008 MacBook Pro, I have my time machine save to an external hard drive. Recently I have been unable to back up my machine because it gets hung up on 'Preparing Back Up' I ...
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1answer
139 views

Resizing without DESTROYING the second partition of a disk

I have a disk that was partitioned in two. The first partition was 1.8TB and is called TIME MACHINE. The second one was 1.2 TB and I call it TOSHIBA 1.2TB. I would like to reduce the first partition ...
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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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1answer
99 views

Should I use raid 0 with my optibay drive?

I installed a 120gb SSD today. My optibay currently holds my MBP stock drive (5400 RPM HD 320GB). Since they have different memory sizes, should I put them in raid 0? The only reason why I want raid 0 ...
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1answer
389 views

Macintosh HD not showing up on disc utility

I am trying to do a clean install on my Macbook Pro 13" from 2011. Here is what I did so far: 1) Booted up on my USB Stick with Mountain Lion Installer mounted on it 2) Opened up Disc Utility and ...
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1answer
108 views

Could two WD Passport Ultra 1TB drives be used in the OWC Mercury Elite Pro Dual mini enclosure as RAID 1?

I'm thinking of buying one more WD Passport Ultra 1TB (I have one already) so that in the near future I could disassemble the two Passports and install the 1TB drives into the OWC Mercury Elite Pro ...
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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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1answer
297 views

Two systems and SSD lifetime increase

I bought a Late 2013 iMac with new generation PCIe Samsung XP941 M.2 based SSD 256Gb. Really powerful SSD. But of course, I was scared about SSD rewrite cycles and wanted to check it because I want to ...