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

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19
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3answers
46k 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 (...
13
votes
4answers
6k 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 ...
12
votes
3answers
21k 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 ...
9
votes
4answers
12k 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 ...
9
votes
3answers
9k 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?
9
votes
1answer
3k 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
votes
3answers
16k 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 ...
6
votes
1answer
295 views

What is the max number of hard links in OS X (10.11)?

I have a file that I keep linking to. It's up to 45 links now. Does anyone know how I can find out what the maximum number of hard links is in OS X 10.11 (El Capitan)?
6
votes
1answer
5k 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 /...
4
votes
2answers
453 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
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 ...
4
votes
1answer
629 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 infinitum....
4
votes
2answers
2k views

How do I recover a HFS+ journaled drive?

EDIT: I found a quasi-solution that sort of kind of works: mount -o loop,offset=209739776,rw -t hfsplus /dev/sdc /mnt/mountpoint/ It appears (via "find /mnt/mountpoint/") that all my data is there, ...
3
votes
3answers
12k 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
119 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
235 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
1answer
8k 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 "...
3
votes
1answer
691 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
1answer
90 views

Can I remove BootCamp HFS+ driver

So, I have an iMac 27" Late 2012, and I have just installed Windows 10 Home 64Bit through BootCamp. BootCamp comes along with several "support software", useful drivers made for Windows and Apple ...
3
votes
2answers
8k 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 ...
3
votes
1answer
251 views

How to force a readonly volume to remount as read-write?

I have an external Firewire volume with some filesystem problems. One problem is that Disk Warrior can't fix these errors because there is not enough space left on this volume (in fact, it is ...
3
votes
0answers
528 views

Is it safe to convert Core Storage partition to HFS+?

I just got my new Macbook Pro, I tried to make two new partitions using Disk Utility but I could only create one. After googling I found out that I can't create more than one additional partition in ...
2
votes
3answers
7k 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
1answer
121 views

Not able to open a Mac OS Extended (Journaled) SSD disk in Boot Camp

I have installed the full version of Paragon's HFS+. I am fully able to read/write files from the partition that boots OS X, but not an external SSD with the same format. I get the "pling" sound when ...
2
votes
2answers
338 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
2answers
3k 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, ...
2
votes
2answers
4k 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 ...
2
votes
1answer
3k views

Read-only HFS+ on Windows 10 with boot camp driver question

I've been searching around on the internet for a while trying to answer this question, but I can't get a clear answer for it. Background info: I'm running El Capitan with a Windows 10 partition on my ...
2
votes
0answers
494 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 ...
2
votes
0answers
345 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
269 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
447 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
877 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
3answers
2k 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 ...
1
vote
1answer
458 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
223 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
2answers
852 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
24 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
1answer
81 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
8k 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
2answers
54 views

How Do I Create a Named Fork and Store Data In It?

It says here... https://en.wikipedia.org/wiki/Fork_(file_system)#Apple ...that the HFS+ file system in OSX supports "multiple named forks". How do I create a named fork at command line, and then how ...
1
vote
2answers
641 views

Rebuild partition table on external HDD - not writable

I have an external hard drive formatted with 3 HFS+ partitions. To cut a long story short I had it connected to a Windows PC and accidentally started formatting the drive to NTFS. As soon as I ...
1
vote
1answer
135 views

Can files be exchanged between FAT32 and HFS+ partitioned drive?

I just got a LaCie 1TB external hard drive and I have a MacBook Air with OS X 10.8. I often exchange movie and music files with friends that have PCs. If I were to partition my drive to have 250 ...
1
vote
1answer
6k 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 86A26AC7-...
1
vote
1answer
316 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
271 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
306 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
3k 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
1answer
32 views

HDD corruption after power cutoff

Yesterday a breaker tripped in the same room as my Mac Pro 1,1 running Yosemite (Hacked boot.efi.) All other machines powered up but this one. Attempting to mount via Target Disk Mode timed out, so I ...