A filesystem developed by Apple Inc. to extend HFS. Also known as "Mac OS Extended" "HFS Extended."

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3answers
22k views

What are the advantages of formatting an external disk as journaled HFS+?

The application Disk Utility /Library/Utilites/Disk Utility.app which is part of the applications that ship with the Mac OS allows to reformat an external disk. Options include: Mac OS Extended ...
11
votes
4answers
4k views

Creating an automated HFS+ compressed folder

I would like to set up an automated way for archiving files in OS X Lion. By archiving I mean using HFS+ compression feature on a specific folder, and make every file that I move into this folder ...
9
votes
1answer
1k views

What file systems does Apple use in iPhones? [duplicate]

HFS WWDC 2012 Session 709, What’s New in the File System, presented by Deric Horn included the following observation: Journaled HFS+ everywhere. In the iOS Developer Library, NSDictionary Class ...
7
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3answers
5k views

What filesystem does iOS use?

I can't find this information documented anywhere. What filesystem do iOS devices use? Did Apple stick with HFS+? Is it different between devices and iOS versions?
7
votes
1answer
13k views

Change “ignore ownership on this volume” from the command line for Mac OS X volume

(This question is a spin-off of another question I asked on this site.) New images always ignore owner/group When creating a new disk image from Disk Utility it is automatically mounted. If you then ...
6
votes
4answers
6k 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
1answer
3k views

Cannot change owner and group of file mounted disk image

I have an external disk which (for other reasons) is formatted using FAT32. On that disk I have created a sparse bundle image formatted using HFS extended (journaled). This image is then mounted on ...
5
votes
3answers
11k views

fsck and Disk Utility won't repair Volume: invalid b-tree node size

I accidentally wrote some .iso data to a disk through dd by mistake. I cancelled the command after just 2 seconds but that was enough to wipe the first EFI partition (200MB) and a bit of the second ...
4
votes
2answers
136 views

How should I reconcile dot-underscore files after a manual backup?

I recently had to (hurriedly) back up data on an older Macbook before migrating it to a new one. Since all I had at my disposal was a large FAT32 formatted drive, I used that and a manual copy. I've ...
4
votes
1answer
409 views

OS X: fsck_hfs unable to fix volume directory count

I'm running fsck_hfs on a very large volume. Unfortunately, there's an issue it appears to be unable to fix -- it reports it, loops back to start with Rechecking..., and reports it again, ad ...
3
votes
3answers
9k views

Which NAS for Mac users?

i work for a company with a 'Mac' department (they are creative/graphics). At the moment they are using an old server mac with a shared Hard drive formatted in HFS+; i would like to buy a NAS with ...
3
votes
1answer
111 views

Does using “rm” command cause journaling corruption?

Some time ago I had some problems with my Mac drive, so I went to the recovery partition and used Disk Utility to check for problems. It reported a huge discrepancy between the journaled free blocks ...
3
votes
1answer
148 views

How do I cat a deleted file which is still open by its inode?

I have deleted a file I still have open. I want to save that file. I know its inode number. I think that sleuthtools icat would work for me except for the following. $ sudo icat -f hfs /dev/disk0s2 ...
3
votes
2answers
2k views

Can I use an HFS+ usb disk with encryption enabled with a Time Capsule (2TB is mine)

I have a 2TB Time Capsule (version 7.6.1) and I want to connect a USB disk formatted as HFS+ with encryption enabled (on MAC OS X Mountain Lion). When I connect it directly to my iMac, it asks for a ...
3
votes
1answer
562 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
2answers
1k views

How do I recover a HFS+ journaled drive?

I had an external 2 or 3 TB (I'm not sure which) USB drive connected to my Mac (running OS X Snow Leopard) with an HFS+ journaled filesystem on it. The drive was working fine, but was a bit slow ...
2
votes
3answers
5k views

How to fix “512 bytes per sector” to “4096 bytes per sector” for an “Advanced Format” 4K sector USB hard drive?

Mac OS X 10.7.4 has a Sharkoon Quickdeck Pro USB enclosure attached. That USB enclosure contains a 4TB Advanced Format hard drive which has 4096 bytes (4K) sector size. The drive is GPT/GUID ...
2
votes
2answers
145 views

How to restore a deleted HFS+ partition table?

I have an external 2TB hard drive with one HFS+ partition, and accidentally dd'ed over the first ~500 MB of it. I have carelessly placed some new partitions in an attempt to repair it, because I had ...
2
votes
1answer
4k views

How to recover a deleted/replaced HFS+ partition from external drive?

How do I recover a HFS Plus partition that somehow I've managed to delete or replace with a Linux command? I didn't do anything else, I mean, I didn't put any files or folders on the drive, so it is ...
2
votes
0answers
218 views

In the disk of an iPhone, are both HFSX slices journaled?

The question Is journaling enabled for the system partition? Background Answers to three questions show that both HFS slices of the disk are HFSX: What is the file system on iPhone? (2011-10-12) ...
2
votes
0answers
190 views

What documentation exists to explain TheVolumeSettingsFolder on OS X?

Searching Google for the following I only found uninformed crap. What is this? looris@Palace-of-the-Nine-Moons:/tmp $ tree /TheVolumeSettingsFolder/ /TheVolumeSettingsFolder/ └── HFSExtentTables ...
2
votes
0answers
371 views

Mac OS X Server: automount encrypted drive before login

I have a 4TB Mac OS Extended (Journaled, Encrypted) hard drive hanging off a Mac OS X Lion (soon to be Mountain Lion) Server that is dedicated to networked Time Machine backups. I'd like to be able ...
2
votes
0answers
684 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 ...
1
vote
1answer
296 views

Recoverability with HFS Plus following removal of a disk from RAID 0 hardware or software

A theoretical question (I do not have spare hardware to test for this). Scenarios If RAID 0 is used (no redundancy of data) with HFS Plus, and if a disk within the array is disconnected for a while ...
1
vote
1answer
173 views

sleepimage file size

I'm planning a clean install of my MacBook Pro with OS X 10.6 and I want to make a partition (among others) only for the sleepimage file. Here's the problem: the partition's size. I know that this ...
1
vote
1answer
447 views

What is the Apple / OS X name for “Alternate Data Streams”?

On old Macs before OS X files already could have two "forks" - a data fork and a resource fork. According to Wikipedia, at some point the HFS+ filesystem of OS X gained the ability to have an ...
1
vote
1answer
19 views

Do files lose their UTI when copied to another file system?

From what I understand, if you create a file on OS X it will have a Uniform Type Identifier. I'm not sure if it's part of the file system or the file itself. If you copy the file to another file ...
1
vote
2answers
1k views

Why TimeMachine defaults to case sensitive?

I've just had some problems with a disk that was formatted with HFS+ case sensitive while every else by Apple was non case sensitive. After a long time moving things away from my biggest disk, ...
1
vote
1answer
69 views

Any risks in creating custom OS X extended attributes?

Is there any risk associated in creating your own custom extended file attributes? For instance: should I be worried about naming collisions? is there any file instability or increased risk of ...
1
vote
2answers
5k views

Fixing up a HFS+ filesystem enough to rescue some files

I have a HFS+ formatted drive that just died on me. I have a back up but it's a about a week old. Unfortunately, I have a few files that I've changed and added since then that I would like to rescue ...
1
vote
1answer
123 views

Verify disk reports error, recovery os repair + fsck says disk is fine

After my time machine backups got stuck to finish at some point, I decided to do a disk check using disk util. I'm getting the following output while running "verify disk": The volume ...
1
vote
1answer
73 views

Will HFS+ extended attributes be lost on FreeNAS?

I have FreeNAS server partially set up on an HP Microserver, but just realized that I may lose all my extended attribute metadata on the files that come from my Macs (which is what most of my ...
1
vote
1answer
144 views

Hot File Clustering with multiple partitions

I'm planning a performance-oriented clean install of OS X 10.6 and I was wondering if the hot file clustering feature will exists only on the boot partition or if there will be one for each partition ...
1
vote
1answer
6k views

How to repair external hard drive that fails diskutil with 'Disk Full Error'

If I run fsck_hfs -y -d /dev/rdisk2s10 it putters along, rebuilds the catalog B-tree then fails when writing the new catalog to disk. bash-3.2# fsck_hfs -d -y /dev/rdisk2s10 ** /dev/rdisk2s10 Using ...
1
vote
2answers
3k views

What is a good HFS+ NAS or network HDD

I am wondering what would be a good, if any, NAS i can find with HFS+. My reason for wanting this is that I need the metainformation in the files to stay intact as I am dealing with a lot of OpenMeta ...
1
vote
1answer
243 views

What is the real world minimum HFS+ journal size for a 4TB hard drive?

Experimenting with Lion, newfs_hfs and smaller journal sizes it appears that 512k is too small for its journal size because kernel hangs occur. Google results show kernel panics for journal sizes of ...
1
vote
1answer
2k 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
90 views

Question Regarding Bootcamp and Windows 7

I am possible going to install windows 7 on my iMac using the standard bootcamp setup and have a question about this setup. I will store all of my large movies on the mac and will need good access to ...
1
vote
0answers
28 views

What file systems can work with OS X File Tags? (HFS+, ExFAT, NTFS, etc.)

What file systems can work with OS X File Tags? (HFS+, ExFAT, NTFS, etc.) I have an NTFS data drive in a Windows machine that I might move to an external hard drive enclosure, if I can use Tags with ...
1
vote
1answer
44 views

Failed to mount partition of Mac OS Extended (HFS+)

As a matter of fact, my 1 TB External hard disk has three partition: "MAC OS", "NTFS" and "FAT32". All of the partitions worked very well in the past. However, I just discovered that my Mac OS ...
1
vote
1answer
110 views

Dropbox Install in Data Partition between OS X and Windows 7 Boot Camp

I have a Data partition between OS X Mavericks and Windows 7 Boot Camp. I have my Dropbox folder in the partition. I have tried using it in the past formatted as exFAT. This was unsatisfactory in that ...
1
vote
0answers
27 views

Optimize filesystem for speed over integrity

On Linux, I use the noatime,nodiratime,nobarrier,data=writeback mount optioins in /etc/fstab to trade filesystem safety/consistency/integrity for speed which makes sense for local development. Is ...
1
vote
2answers
53 views

How to get file metadata?

How to get extensive filesystem information about a file? I have a file that consistently causes errors in my backup utility (Unison). I'm trying to narrow down a bug and find out how it is different ...
1
vote
1answer
195 views

Why is a hard drive not readable anymore after removing it from the Mac?

I have a mid 2010 27" iMac. Until this evening it had an SSD (primary drive with OS X Mavericks installation on it) and a HDD as second drive. The HDD is a Western Digital I built into the iMac in ...
1
vote
2answers
440 views

need suggestion, Common file system between MAC OS Mavericks and Windows 7 [duplicate]

I have Mavericks on one HDD and Windows7 x64 on another HDD in same machine. Windows can't even see MAC partitions while MAC gains READ ONLY access to NTFS partition. I want a robust and common file ...
1
vote
0answers
244 views

How can I encrypt a large external drive?

I am using a LaCie 3 TB internal drive in a Sharkoon Quickport. The dock is USB 3 and I'm on a retina MacBook Pro with Mountain Lion. The drive is encrypted with TrueCrypt. OS X won't format the ...
1
vote
0answers
236 views

Can't write HFS+ in Mac OSX

I've an external HDD of 500GB and in HFS+ format. It works normally on my Mac running OS X 10.5.8. After I plugged it into a machine running Windows, I found a vacant partition of 128MB and formatted ...
0
votes
1answer
50 views

How can I put my image of a drive onto a new partition on a Mac? [closed]

My friend has a Mac which suffered some sort of hard drive failure. I'm not sure if it is a hardware failure, the filesystem is corrupted, or both. We tried 'repair' in Disk Utility and it said it ...
0
votes
3answers
101 views

Recover corrupted Mac HFS+ drive (image) under Linux

I'm trying to recover an apparently corrupted disk. It appears that through improper shutdown the drive has been somehow killed. It's the main partition of a Macbook Pro. I've used dd to copy the ...
0
votes
0answers
22 views

Sharing Dropbox folder between OSX and Ubuntu

I've got a MacBook Pro in dual boot MacOSX + Ubuntu. I'm sharing a home partition between the two, with HFS+ filesystem, and a Data partition, also in HFS+. In the Data partition I placed my Dropbox ...