refers to formatting, or erasing a disk, deleting all data on the disk

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28
votes
3answers
11k views

What are the differences between journaling HFS+ and non-journaling HFS+?

I'm about to format an external hard disk drive (HDD). What are the key differences between journaling HFS+ and non-journaling HFS+? Apart from the fact that one has journaling and the other does ...
17
votes
5answers
14k views

Lost password on Mac OS Extended (Journaled, Encrypted) Drive. Want to reformat it

I am using a Seagate Free Agent Desk external drive as my Time Machine on a modern iMac running Lion. I made the mistake of encrypting the drive, and I do not remember the password. I dont mind losing ...
13
votes
4answers
5k views

HFS+ case-sensitive or case-insensitive — which type to use for the primary drive partition?

What reasons are there for choosing the case-insensitive version of HFS+ when formatting the primary drive partition? Would case-sensitive not always be the best choice?
11
votes
5answers
692 views

Should you format your Mac?

Back in my Windows days, I used to fully format my PC once a year or so, to start fresh and get rid of some of the slowdowns. It helped. Would you recommend the same for Macs? What's the recommended ...
10
votes
4answers
32k views

How do I make a bootable USB flash drive for a MacBook Air?

Does anyone have a Terminal command-line recipe for making a new bootable USB flash drive for one of the new MacBook Air's? Is there a way to dd copy the USB boot device that comes in the box and ...
7
votes
2answers
1k views

Time Machine backup format

Is the format of Time Machine's backups documented, or standard? Can I extract the files with a non-Mac system?
6
votes
1answer
6k views

How to format the OS X installer USB stick that comes with MacBook Air?

When you purchase a new MacBook Air they give you a mini-USB drive that is used to reinstall OS X and iLife '11. How can I format this USB stick and put whatever I want on it? The option to format ...
5
votes
1answer
13k views

How do I format a disk partition from the command line on OS X?

How do I format a disk partition from the command line on Mac OS X? In case someone wonders why: because for some people Disk Utility fails.
5
votes
8answers
6k 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 ...
5
votes
1answer
2k views

Why can't I write to the last block of my SDXC card on my MBP?

I have a 64GB SanDisk SDXC memory card which I would like to use with my MacBook Pro and its SD card slot. However, I am having some trouble formatting/partitioning my SD card and I can't figure out ...
5
votes
1answer
227 views

Unable to format pendrive, diskutil error

When I insert my USB Pendrive in my iMac i see this message: I tried to format it both with DiskUtility and with diskutil command in terminal but I get this error: iMac:~ User$ diskutil eraseVolume ...
4
votes
1answer
19k views

How to securely erase/format an iPhone for resale?

I've read a couple guides that talk about restoring the iPhone to it's base operating system, then syncing three different full playlists of music in order to overwrite any previous personal data that ...
4
votes
1answer
146 views

How do I boot from my Mac partition?

I tried to install Windows 7 on my Mac via Boot Camp, but the disk of Windows 7 doesn't work. When I tried to install the Windows 7 it shows a black screen. Now I want to boot back to OS X, but I ...
4
votes
3answers
8k views

Deleting a partition in Disk Utility fails. (Error: -69879)

This is the output in Disk Utility: Disk Utility cannot modify this disk because it contains CoreStorage physical volumes. Use command line distil instead. The selected partition won't be ...
4
votes
1answer
837 views

USB flash drive in ExFat doesn't unmount

I need to transfer large files (9 GB) from my Mac to a PC. I bought a 64 GB flash drive, and it wouldn't work because it was in FAT 32 format and I couldnt transfer such a large file. I reformatted ...
3
votes
2answers
2k views

How can I reformat my hard-drive?

I am in Disk Utility under the Erase Tab. The Format section is grayed out even though I have my main disk selected. The only buttons active are Erase Free Space, but I want to reformat the entire ...
3
votes
1answer
209 views

USB Drives always need to be formatted to delete items

I have a MacBook Air running Lion. Issue is I cannot delete things from USB sticks. The icons disappear but if I try to copy something on I get a not enough space error message. I can format the ...
3
votes
1answer
428 views

Format External Western Digital Drive to be used with only Mac

I recently ordered Western Digital My PassPort Essential. I will get it by tomorrow evening. It comes pre-formatted using NTFS file-type. I need to format it, to be used with My MacBook Pro (i.e., ...
3
votes
3answers
1k views

Secure erase drive in Single User Mode

My 2007 Macbook Pro has suffered from a failure of its GPU and will now only boot in Single User mode. I want to sell it on eBay for spares, but obviously I don't want a hard drive with live data ...
3
votes
3answers
3k views

Can I install OS X lion on a disk that is OS X Extended Journaled encrypted?

Just wondering if I can, using Disk Utility, format the hard drive such that it is OS X Extended (HFS+) Journaled encrypted. Will Lion be able to install on that disk?
3
votes
3answers
758 views

How to format external drive into ZFS?

I've installed MacZFS, I've read the FAQ and Getting Started section, but I've still troubles to understand how to simply format the external drive into ZFS on OSX. I'm confused with zpools, can ...
3
votes
1answer
211 views

Why are my DVD disks in the wrong format?

I'm trying to play DVDs on my MacBook Pro however the disk doesn't play it doesn't even mount. When I check Disk Utility it shows the format as Windows NTFS 3G. If I try the same disks on another ...
2
votes
3answers
6k views

How to nuke everything from imac and start it at the beginning from scratch like i first bought it

I have some problems that i cannot resolve on my iMac and now I would like to delete everything and start it from scratch like when i first bought it a few years ago. Please show me the steps. ...
2
votes
2answers
458 views

Mac OS-X disk file format

I need to format an external hard disk on a MacBook Pro (USB2 connection). In the disk utility, Erase tab, I can only choose between these formats: MacOS Extended (Journaled) MacOS Extended ...
2
votes
2answers
149 views

Does it make sense to buy a compatible Mac external disk?

What is the advantage of buying a compatible Mac external disk? Using Tuxera NTFS I can have an external disk for both, the windows partition (or any windows machine) as well as for the Mac one. Does ...
2
votes
1answer
904 views

Why is my iPod Shuffle an “Unknown Device”?

Help, I've tried everything. I have an iPod Shuffle 2nd generation and ever since I plugged it into an AC wall charger, my PC has stopped recognizing it. I tried multiple PCs, to ensure it's not my ...
2
votes
1answer
118 views

how to write to a windows formatted disk from OSx?

I have 4 external hard disk formatted on windows in NTFS, but they are lying unused since I bought mac, so I am looking forward somehow I should be able to write to those disc without having to format ...
2
votes
1answer
205 views

Why does OS X format MS-DOS filesystems so much faster than Windows does?

When I format a MS-DOS filesystem using Disk Utility in Mac OS X it takes only a few seconds, but when I format a FAT32 filesystem in Windows it takes several minutes. What is OS X doing differently? ...
1
vote
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 ...
1
vote
2answers
787 views

Lost Time Machine Password - Unable to Format Disk

I lost my password to my Time Machine backup. It's on a Seagate FreeAgent USB drive. I don't mind losing the data, I just can't figure out how to format the drive. I found this thread, however, the ...
1
vote
7answers
6k views

Partitioning secondary internal hard drive failure

Looks like my 2nd HDD became a brick. I tried to partition it via Disk Utilities/booted from recovery partition/diskutil to no luck! I got vague/strange errors such as: unable to unmount, or: ...
1
vote
1answer
1k views

Update OS X recovery USB stick with Mavericks

I've got a Snow Leopard 8GB USB stick that I got from my MacBook Air. Now that Mavericks is available, I'd like to update that USB stick with Mavericks. I can't seem to be able to format that disk: ...
1
vote
1answer
12k views

How to format a disk to NTFS using Mac OS X

I am looking for a simple GUI based way to format drives to NTFS (Windows) on Mac OS X Snow Leopard.
1
vote
1answer
489 views

Create partition on MacBook Air that isn't deleted during restore

I have a 20gb file that I need to back up and I don't have an external drive or access to any high-capacity cloud storage but I need to format/reinstall OSX Lion on my MacBook Air. On Windows and ...
1
vote
2answers
2k views

How to partition an SSD that fails with error 69888 - couldn't unmount disk?

I erased the SSD drive in my MacBook and was reinstalling Lion when it failed about 75% through the install. Now in Disk Utility, sometimes I see the SSD drive and sometimes I boot and it's not there ...
1
vote
2answers
5k views

Changing a Volume's “Device / Media Name”

I know a Mac volume can be renamed... obviously. But if you look at the output of diskutil you will see that a volume also has a "device name" that corresponds to the name it was given when it was ...
1
vote
1answer
149 views

Seagate 4TB, 3,5" / SATA III (ST4000DM000) and SK-3500 Super-S Combo

I bought a 4TB 3.5", SATA III Seagate Desktop HD and put it into a SK-3500 Super-S Combo. My iMac (late 2009) did, however, not detect the HD when I connect it. Since I cannot see it, I am unable to ...
1
vote
1answer
544 views

Can't do anything with external hard drive, “.Trashes” is probably the boogyman

I bought an external Samsung hard drive today. But I'm not able to do anything with it. Here are the problems I'm having: I can't put anything on the hard drive. Finder gets stuck at 'preparing ...
1
vote
1answer
330 views

Repartition my existing hard disk

First time Mac user here. I'm quite aware with all the posts here about repartitioning hard disk but I'm quite confused if repartitioning would erase all my data on my hard disk. I recently bought ...
1
vote
1answer
542 views

Grab list of Stats, Application Data, and Serials off OSX 10.6 to prepare for reformat and fresh install?

I need to reformat my 2007 OSX as it is now returning kernal errors. I want to install everything fresh but I have a lot of software and don't want to sit here making a list of everything installed as ...
1
vote
1answer
1k views

When is the GUID partition table (GPT) preferred over Apple partition map (APM) for external drives?

I have seagate external portable hard-drive 1 TB, and I will be using with following Mac's. 13" White MacBook (Intel Core 2 Duo) running Snow Leopard 13" MacBook Air (Intel Core i5) running Lion iMac ...
1
vote
1answer
1k views

How can I repair a hard drive that Disk Utility and Disk Warrior can't fix?

I have a Mac Pro running Mac OS X Lion, and one of my hard drives has acted weird since attempting to repair permissions. I used Disk Warrior, but it says the HD can't be rebuilt. When I try to format ...
1
vote
1answer
925 views

External HD Shows up in Disk Utility, but I can't access it

I have an External 1TB hard drive that has been corrupted, it was so corrupt that I had to abandon the files on it. So now I'm simply trying to erase it so I can begin using it again. But here's the ...
1
vote
1answer
205 views

JPEG XR support

What kind of support does OSX have for JPEG XR (also known as HD Photo)? I know that there is a Photoshop plugin for it, but are there any other forms of support such as an image preview or other ...
1
vote
2answers
2k views

Disk Utility won't allow to delete and resize partitions

I'm running OS X 10.9 and I had a linux partition when I updated from 10.8. Since I updated I can't boot on linux, which is no big deal for me. Though I would Like to delete the partition that is left ...
1
vote
0answers
145 views

Waiting for disks to reappear on SSD new install

I just installed a new Samsung SSD 840 PRO in an Early 2011 Macbook Pro, trying to format drive and it is stuck on: "Waiting for disks to reappear" What should I do now?
0
votes
1answer
2k views

External drive format to be writeable on both Mac and Windows

What file-format an external drive has to be for it to be writeable on both Macs and Windows machines? I have a 750GB external drive originally formatted in NTFS for Windows, but it's not writeable ...
0
votes
1answer
2k views

Error copying large file to usb 16GB Thumbdrive

Trying to copy a file (Win7_IE8.vhd) to a USB drive. The file is 9.07GB in size according to my Mac file info. The USB drive is 16GB. I bought it new 10 minutes ago. This is its first use. I get: ...
0
votes
1answer
99 views

Read-only on Mac and PC

I need to give out a USB pen drive with my music on it to a load of editors, but I want the drive to be read-only on both Mac and PC so that no one can inadvertently delete the originals. Is that ...
0
votes
2answers
14k views

How can I reformat my macbook pro?

I have an 8 months old macbook . It has gone little slow I believe because of me installing VMware . Which I have now removed but still performance is not as good I used to be. I would like to reset ...