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

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17
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3answers
14k 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 ...
15
votes
4answers
6k views

FAT or exFAT or NTFS

I recently brought Western Digital's Passport Essential, and will be using with my MacBook (running Snow Leopard), MacBook Air (running Lion) and Windows 7 Desktop. I should be able to read-write data ...
8
votes
2answers
8k views

How do I resize OS X main partition when I already have other BootCamp partitions?

Short story: partition resizing using Disk Utility fails because MediaKit reports no such partition when I try to shrink it. I also tried the same while booting from the DVD, same result. Details: ...
7
votes
6answers
24k views

How to eject my external drive when my Mac refuses because of Spotlight?

I have plugged an external disk to my Mac. Now, I want to eject it. But my Mac stubbornly refuses and says that an application may be using the disk. I have not launched any app neither opened any ...
6
votes
4answers
18k views

Is there a utility for mac that shows the information of an SSD like the health etc…?

I am wondering if there is a utility for the mac that allows you to see the details of an SSD like the health of the drive, TBW (total bites written), how many running hours etc... In researching for ...
6
votes
5answers
13k 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 ...
5
votes
2answers
2k views

Why is it important to keep lots of freespace on OSX? What is the impact?

I have a 500GB drive and have less than 50 GB free. Console is reporting several interesting errors saying I'm too low on space and it's cleaning up "stuff" 1/6/13 4:49:51.475 PM ...
9
votes
3answers
55k views

Disk Utility won't Unmount HD for formatting

I have two internal drives in my 27" iMac (10.8.5). An SSD system disk and a 1TB SATA drive. The HDD has been acting up recently, very slow performance, bad behavior etc. Tech Tool Pro and Disk ...
9
votes
4answers
2k views

Which process is periodically writing to the disk?

Even when I am not doing anything on my Mac, I see a lot of Disk IO: "Data Written per Sec" in Activity Monitor showns continuous writes: Is this normal? Why would some process continuously write? ...
7
votes
4answers
8k views

What are the sector sizes on Mac OS X?

I read on the HFS Plus Wikipedia page that the default sector size on a Mac is 512 b. However, I also read that Macs support 4kb sectors. How can I determine which I have, 512 b or 4 kb sectors? I ...
6
votes
3answers
32k views

How can I delete a partition (coreStorage logical volume?) from the Terminal?

I finally understood why Disk Utility will not change the partitions on my HDD, even though I added the most recent one myself (maybe significant: to test Yosemite DP) with it. Now I see it says it ...
5
votes
4answers
206 views

How do I determine the speed of a disk drive?

I'm looking for a way to determine the read/write speed of a disk drive, either by looking up some system information or running a simple benchmark test utility.
4
votes
3answers
3k views

Tracking down frequent (every 20 seconds) SCSI hard disk drive access in 10.7

In a Lion Server (10.7.3 and 10.7.4 tried) system with multiple drives attached to an HPT SATA controller, there is some process that keeps accessing the hard disk drives exactly every 20 seconds. As ...
4
votes
2answers
508 views

What process is accessing the hard drive?

I can hear the hard drive chugging away when it should be idle. Some process is writing/reading from it in semi-random bursts, let's say once every second. Very annoying and wasteful. I tried ...
3
votes
4answers
25k views

What is filling up my hard drive so fast?

Last night (Because my hard drive was almost full) I freed about 4GB. Then I came back to my Macbook about 3hrs later (I left it idle) and Its was full again. Is something is eating my mac? If I go ...
3
votes
3answers
3k views

Why does my 3TB Seagate HD keep formatting as a Logical Volume Group

This is really annoying. I have a brand new Seagate 3TB 7200 RPM hard drive that I am trying to format/partition in Disk Utility. Every time I change any settings or erase the drive, it changes it to ...
3
votes
1answer
2k views

Is it a good idea to seal off the optical drive bay after installing a second HDD?

When installing a HDD instead of the SuperDrive: Does the bracket, which holds the HDD, seal off the optical drive slot in the unibody? If not, it seems that debris and dust could get in. (I guess ...
2
votes
5answers
25k views

How do I fix my SSD after installing Yosemite and Enabling TRIM? No boot & can't erase

I recently upgraded to Yosemite, enabled FileVault and foolishly enabled TRIM (had no idea it wasn't supported). Upon restart, my machine gets the grey screen with the crossed-out circle of death. ...
2
votes
3answers
25k views

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 ...
2
votes
4answers
9k views

What can I do to check the integrity of the hard drive and all its files, to see if they are corrupt or not?

Recently there has been some files disappearing (in iTunes), and I'm not so sure of the extent of this problem yet. Perhaps it may have been an iTunes upgrade bug, but I'm not so sure. What can I do ...
2
votes
3answers
8k views

How can I tell if my iMac's hard drive is dying?

A couple of days ago, my three-year-old iMac locked up. When I rebooted it, it only displayed a folder icon with a flashing question mark. After a couple more reboot attempts, it booted. I ran Disk ...
0
votes
4answers
9k views

Need to replace a hard drive in a macbook

I have been asked to "replace a hard drive in a macbook". I'm able to physically swap out the drive, but I have no idea how mac software works. I have some questions: If I put in a new hard drive, ...
0
votes
2answers
8k views

OS X Snow Leopard - Can't boot from HD, Target Mode or CD

Today my computer started getting really slow and freezing alot, so i rebooted. HOwever it won't boot up again, keeps getting stuck on the grey screen. Here's what i've tried: Startup in safe mode ...
9
votes
3answers
1k 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 ...
6
votes
2answers
2k views

Encrypted external drive usually prompts for password, despite being in keychain

I have an external encrypted drive, and almost every time I plug it in, it'll ask me for the password, even though it's already in my keychain. If I type the password in, it'll mount as expected. ...
5
votes
3answers
297 views

Time Machine External Drive

What factors are important when selecting an external hard drive for time machine backups?
4
votes
1answer
2k views

How can I do a fresh install of OSX Mountain Lion onto my SSD for my Macbook?

So I just got a SSD for my MacBook Pro (early 2011). My macbook is sluggish and has so much stuff that I don't use anymore and just want to start over from scratch basically. I did a time machine ...
3
votes
1answer
424 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 ...
3
votes
1answer
4k views

backing up an OSX image to an NTFS drive?

I would like to make an image of my entire OSX install, so that I may restore to it if necessary. I'd LOVE to have incremental backups, so bonus points if anyone can figure out how I can do this! ...
3
votes
2answers
40k views

Cannot Unmount Mac OS X Base System Disk

My Mac running Lion was being slow, so I was decided to reinstall OS X. I don't have any Time Machine backups. Everything went file, but in the middle of the installation, it got stuck, and later the ...
2
votes
1answer
438 views

Erasing and Partitioning Hard Drive from Internet Recovery

My MacBook Pro (mid 2012) was encrypted and running Yosemite 10.10.3. (The last update with Photos ruined it.) Yesterday, all of a sudden, everything freezes. I forced Shut Down and since then, it´s ...
2
votes
1answer
10k views

Will 'Internet Recovery' necessarily erase my hard drive?

My Mac is booting to the 'question mark' folder. I option-booted to 'Internet Recovery'. Before I proceed, I would like to know: Will 'Internet Recovery' necessarily erase my hard drive? Can anyone ...
2
votes
1answer
7k 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. ...
2
votes
2answers
3k 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 ...
2
votes
2answers
4k views

How to back up Boot Camp before upgrading my hard drive to an SSD?

I have a Macbook Pro which has a 750GB HDD. I'm currently using Bootcamp to run Win 7. If I want to upgrade the HDD to a SSD but keep my stuff from both the OS X side and the Win 7 side what are the ...
1
vote
2answers
54 views

Logical Volume Group 17gb “Available Space”

Can anyone help explain why there is 17 GB worth of free space on my LVG I can't seem to do anything with this space. Is there anyway to fix this? I have already reformatted the disk then cloned the ...
1
vote
1answer
2k views

MacBook Pro upgrade to SSD migrating OSX and Bootcamp partitions

I wasn't able to find the info I needed here or on Apple's own forums or via Google, so here goes. I have a MacBook Pro 15" early 2011 model with a 500 GB internal hard disk drive (non-SSD). ...
1
vote
1answer
2k views

Running out of hard drive space, yet Disk Inventory shows only 190GB used vs. 480 GB used in HD Get Info? How is that possible?

I'm down to 20GB on a 500GB hard drive and would like to know what's eating up the disk space, so I can clear out any large things I no longer need. 2 screen shots are showing me Disk Inventory ...
1
vote
1answer
395 views

Will internal HDD spin down when a Mac is booted from another internal SSD?

On my MacBook Pro, I am planning on removing the optical drive and adding an SSD to the mix. Since Apple doesn't support this configuration, I don't find any official documentation covering SSD in the ...
1
vote
2answers
8k views

How to upgrade HDD to SSD and replace the optical drive with HDD?

I am trying to understand the process of switching out my HDD for an SSD and then replacing my optical drive with the same HDD just removed in a late 2011 Macbook Pro 15.4". Is there any benefit to ...
1
vote
1answer
845 views

Compatible SSD for Macbook Pro (replace HDD)?

Any special compatibility concerns when replacing the HDD on a MBP with an SSD? I am running Parallels with XP Pro and Ubuntu and have been disk bound for some time. Not too concerned about size, ...
0
votes
1answer
107 views

Stop sign when booting from internal ssd, boot goes fine if the ssd is in external case

sorry for the long post and my english. I have an early 2011 Macbook Pro 13 which I purchased in july 2011 and it worked fine until one week ago. Since when I bought it i replaced the stock hdd with ...
0
votes
2answers
256 views

Hard Drive Issues with MacBook Pro 13-inch mid-2012

I'm trapped in a HDD nightmare with my MacBook Pro mid-2012. I updated to Yosemite 10.10.3. A couple of days after the update, I was watching a movie on my TV screen via HDMI. In the middle of the ...
0
votes
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.
13
votes
2answers
5k 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 ...
9
votes
9answers
12k views

What is the benefit of using flash memory in the Macbook Air?

I don't understand why Apple does not use SSD drives in the Macbook Air like some other manufacturers to (e.g. Asus, Samsung). The technical specifications of the Macbook Air on Apple's website never ...
9
votes
9answers
38k views

Macbook HD “Other” all the Sudden Almost Full

As you can see in the below image, my HD "Other" category is almost full. A couple of days ago, I randomly kept getting a popup saying that my disk was almost full. Then I went in and noticed the ...
6
votes
2answers
29k 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 ...
6
votes
4answers
778 views

Can I just swap the hard drives of two macbook pros (different years)?

I'd like to swap the hard drives of two Macbook Pros. One is a Core 2 duo model from 2010, the other a 2011 i5 model. Will this work? I just want to save time and not go through a lengthy data copying ...
6
votes
4answers
47k 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 ...