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43

It's not necessary. For more details than you could possibly want, read Fragmentation in HFS Plus Volumes by Amit Singh (author of Mac OS X Internals: A Systems Approach).


27

I don't have numbers to back up the statement, but using HFS+ non-journaled is a good idea in certain volumes that require absolute speed, without worrying (too much) about a possible "data loss" or "data corruption" in case of power failure or similar. When is using HFS+ Non-journaled a BAD idea? External (USB, FW, ESata) drives that are connected and ...


25

You can use the dd command to make a bit-perfect clone of a drive. It's a command line tool that ships with OS X. In order to make the clone perfect you'll need to ensure the source and the destination aren't actively in use. To prepare for the clone I recommend creating a secondary boot disk that you can boot from. Your source for the clone should be an ...


23

Your best bet is to not "defragment" SSD storage. The life span of the drive is a function of how the controller decides to write data and how much of the capacity is held in reserve to hide small errors over time. An SSD in general will wear out due to write exhaustion before a hard drive will as the magnetic media can withstand several orders of magnitude ...


22

HFS, the filesystem Mac OS X uses (technically HFS+) has a number of built-in measures that reduce fragmentation of the drive. First, it uses extent-based allocation, which is just a fancy way of saying that it writes multiple contiguous blocks of data a time (and therefore inherently has less fragmentation of data). Second, it uses delayed allocation, ...


20

Carbon Copy Cloner should do the job. CCC (Carbon Copy Cloner) creates a bootable backup, and preserves all your files, and in the right hierarchy. You can also have incremental backups (it only backs up items that have changed since the last backup). You can schedule CCC to backup regularly. CCC also has the ability to backup over a network. I also like the ...


18

Generally speaking, you do not need to defrag HFS+. While it is possible to fragment it, the implementation in the OS X kernel includes a number of features that tend to limit fragmentation, including deferred block allocation and hot banding. Unless you do something really odd (constantly keep the drive over 99% full while doing lots of reads and deletes) ...


17

FAT Fat is definitely off the table since it only supports files up to 4GB. So you won't be able to transfer files over 4GB like you stated in your question. exFAT exFAT won't have this limit since it's capable of supporting files up to 16 exabytes (16.000.000 terabytes). It's an excellent format for your flash drives and/or external (not internal!) hard ...


16

Most people will tell you Macs don't suffer from disk fragmentation, citing technical arguments most people don't understand. It's somewhat true: since there's nothing you can do about it without spending $20 on something that might not improve the performance of your computer at all, you could instead focus on other maintenance tasks and just buy a shiny ...


15

I disagree with Randolph's Answer. If anything, the article says exactly the opposite of the "good performance for a while" part. What we found was the exact opposite: an OS that doesn't appear to be affected by SSD performance degradation And I don't have Apple's SSD. I have an OWC on a Mac Pro and haven't had any performance degradation since I ...


15

Here you are some major points: Reinstall your Mountain Lion. Don’t run benchmarks on your new SSD Benchmarks usually write a lot of data to the disk (to test the write speed), wearing it out. So it is the best way how you can ruin your SSD even before you start using it. Don’t do it. Enable TRIM OS X supports TRIM only for Apple-supplied ...


14

No, it's only recommended when unplugging the cable. The reason why you eject is so that any processes reading and writing from the disk will cause OS X to notify you of the disk being in use and prevent data corruption that can occur by just unplugging the disk while it's in use. Additionally the OS might queue different write operations to a cache before ...


14

Most of the difference you're seeing is due to Time Machine's "Local Snapshots" feature. When Time Machine is turned on but the backup device isn't available, it backs up to the local volume. The space used for these local snapshots is counted as "in use" by Disk Utility and System Information, but not the Finder (see the Disk Space considerations section ...


13

MacBooks are fine to be transported when in sleep mode. When a MacBook goes into sleep, it takes 20-30 seconds to save the current state to the HDD, while this is happening you'll see the status light shine brightly. Once it goes into a slow pulse, the MacBook is asleep and the HDD is inactive so there is no risk to the HDD from normal movement in a bag ...


13

I can only give you an overview of my own personal experience with the process and hardware I used. Alot of this is copy pasted from my posts on the thread related to this on macrumors.com. Here goes: I bought the ebay optical bay caddy linked here. Works great. Depending on your model, I would recommend using the "Optical Drive Replacement" guide on ...


13

It is possible, although not from Apple themselves. A company called OWC seem to specialise in SSD upgrades for macbook's and have upgrades for your model available here These particular upgrades offer greater speed and capacity to some of the stock apple SSD's from 2011.


12

FAT32 (called MS-DOS (FAT) by Disk Utility; a filesystem originally released in 1977 and updated a few times since, lastly in 1996) really is the only cross platform filesystem that is going to work fully out of the box with Windows and Mac OS X. Be careful though, if you are using Disk Utility to format the drive, you should make sure to choose the Master ...


11

John Siracusa's detailed Lion review covers the new FileVault disk encryption feature in great detail: http://arstechnica.com/apple/reviews/2011/07/mac-os-x-10-7.ars/13#lion-file-system To summarise, the new system is "volume" based. This means that not all volumes can be or are encrypted. The Lion recovery partition for example is not encrypted. Non Mac ...


11

From the DropDMG manual: Sparse bundle disk images appear as a single file but are actually stored as a folder with many files inside. This makes it more efficient to back them up using Time Machine or other backup utilities, as only the changed parts need to be copied. Additionally, sparse bundle disk images work well with the Compact ...


11

In terminal, you can use diskutil to get information about the drive, including the device block size: $ diskutil info / | grep "Block Size" Device Block Size: 512 Bytes


10

While in the Finder, go to the "Finder" menu and select "Preferences". From the "General" tab, place a check next to "Hard disks" -- this will make your hard drive visible on the Desktop. From the "Sidebar" tab under "Devices" again place a check next to "Hard disks" -- this will put your hard drive in the sidebar of any finder window, and should also add ...


10

You can use terminal to read the File System Personality: diskutil list / Look for the fields named below: File System Personality: Journaled HFS+ Type (Bundle): hfs Name (User Visible): Mac OS Extended (Journaled) If the file system is case sensitive, you will see Case-sensitive Journaled HFS in the first pasted line and Mac ...


10

Yes. I swap out drives all the time... it's basically transparent on a Mac. I've even booted my MacBook Pro's drive on my wife's MacBook Pro and vice versa. It takes a minute longer to boot as it reconfigures itself but once it starts you can't even tell the difference.


10

Shirt Pocket's SuperDuper is a nice app, but it is pricey. $28, free trial available. One of its good features: It allows you to perform an incremental backup that only updates what's changed.


10

The HDD is formatted using FAT32 which has a known limitation of 4GB file size. You need to format it using exFAT which is supported by OS X and Windows.


10

I would try using rsync from the command line. rsync -av --ignore-errors /Volumes/failingDrive/ /Volumes/brandNewDrive should do the trick. Mind the trailing / at the end of the source. Rsync will not copy files it finds on the destination, so if you call it a second time it will continue where it left off.


9

You can press the option key to change the behaviour move instead of copy between different volumes copy instead of move on the same volume


9

FAT32 (called MS-DOS (FAT) in Disk Utility) is a cross compatible file format although you will be limited to 4GB maximum per single file. Plugins for the mac can also allow it to handle using NTFS volumes, which is a more desirable solution


9

Yes. FileVault2 is volume based so you can have an encrypted Mac OS volume and an unencrypted Windows bootcamp partition for instance. The Recovery partition is also not encrypted. FileVault2 requires Lion to decrypt/decode the drive. It doesn't work with Windows Linux, or previous versions of Mac OS X. I recommend John Siracusa's Lion review for more ...


9

If your goal is to completely wipe all data which is on your current boot disk, then follow the procedure below. Insert the Mac OS X CD. Restart the computer. Immediately after the startup sound, press and hold the "C" key to start up from CD. When the Installer screen appears, do not click Continue. Instead, choose Installer > Open Disk Utilities. ...



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