The Apple Store has historically used LaCie Rugged Drives (you may have seen them behind the Genius Bar) but any drive will do. Sites like Newegg and Amazon are great places to start. The first step is to obtain an external drive. The benefits of a triage drive are that you can use it on any Mac to perform system diagnostics and troubleshooting in the event of a system or drive failure, have access to all your software installers in a single place, and it will be much faster to access than an optical disc. We’ll show you how to plan and build your very own.Ī triage drive is an external hard drive (usually a 2.5” hard drive for enhanced portability, although any form factor will work as long as the capacity is sufficient) that contains one or more emergency bootable partitions and a storage partition for software installation images. One could, of course, purchase an external SuperDrive from Apple for US$79 (or a third-party external optical drive), but there’s a more convenient and useful way, a method that Apple Store Genii have known and used for years: a triage drive. While Apple has attempted to alleviate some of this difficulty by implementing the Mac App Store for software installations and the Lion Recovery Partition for system maintenance and troubleshooting, there are still many tasks that are either easier or can’t be performed at all without an optical drive. DiskWarrior's Report on Repairing "Unknown Disk".With the increasing popularity of the MacBook Air, which lacks an optical drive, the introduction of an optical drive-less Mac Mini, and the likely impending death of the optical drive in other Macs, it is becoming more difficult for Mac users who have relied on optical storage to perform many tasks on their Macs. Instead of clicking Replace, we’ll go ahead and click Preview. Go ahead and click Rebuild then wait until DiskWarrior has finished and shows you the Rebuild Report. I would normally try doing a normal rebuild first and checking the preview, it’s really trial and error. Now, in my friends case, doing a “Scavenge” rebuild and repair in DiskWarrior would recover only a few files, but doing a normal rebuild would recover all the files. Getting Ready to Repair "Unknown Disk" in DiskWarrior. Once you’ve got DiskWarrior open, it’s time to repair the disk! The attached volume is very likely called “Unknown Disk”, just select the one that’s most likely to be your attached sparsebundle. fsck_hfs just doesn’t cut it, but DiskWarrior will often always work its beautiful magic and get drives mounting for me again. Okay, now that the sparsebundle has been attached to OS X, it’s time to open one of my favourite programs of all time: DiskWarrior. Here’s my final command to attach the sparsebundle to Mac OS X:Īttaching faulty.sparsebundle to OS X via Terminal. We’ll also add a few flags to tell hdiutil that we don’t want to verify or check the checksums of the image (which are probably causing it to fail mounting in the first place). Never fear, the command line is here! Using the hdiutil command in Terminal, we can attach the sparsebundle to the filesystem without actually mounting it. Here are the steps I followed to mount the “corrupt” sparsebundle and recover all the data in the process.įirst up, as you would have tried, mounting the sparsebundle through DiskImageMounter.app doesn’t work. My initial thoughts are “Shittt… all the data is gone”, but I know that just because I get a generic error message, doesn’t mean I can’t fiddle around and get it working again. Even cloning the sparsebundle and trying on another computer resulted in the same problem. Whenever they logged in and tried to mount their home-foldered sparsebundle, the error “No mountable file systems” would appear. Recently I had an issue where a friends Legacy FileVault sparsebundle became corrupt when they upgraded to OS X Mavericks. Unable to attach "faulty.sparsebundle" (No mountable file systems)
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