You can of course use a SoftRAID-driven RAID with a Mac which runs from a Fusion Drive.Ĭurrent disk tuning, repair, and recovery tools – other than Disk Utility – all work at the HFS+ level, and thus function normally with Fusion Drives and other CoreStorage LVGs. However it specifically does not support the use of Fusion Drives, but does support SSDs. SoftRAID 5.1 is claimed to be “fully compatible” with El Capitan.
Shirt Pocket’s SuperDuper 2.8 is claimed to be “compatible with El Capitan.” Although no further details are given in the documentation or on the vendor’s website, details of the sorts of manoeuvres required to deal with LVGs are given by Peter Upfold, in the context of making an encrypted bootable backup using SuperDuper and lots of shell commands. For instance, this states that “CCC cannot create a Recovery HD volume on a Fusion or FileVault-protected volume, therefore CCC will never allow you to remove the Recovery HD volume that is associated with a Fusion or FileVault-protected volume.” Prosoft Engineeering’s Drive Genius 4 and Data Rescue 4.2 are claimed to be fully compatible with current Mac models running El Capitan: “Drive Genius 4 fully supports the latest Apple technologies, including Fusion and FileVault2 drives.” Prosoft also cautions that defragmentation is not available for SSDs, including those in Fusion Drives, and does not appear to provide any tools for addressing LVG issues.īombich Software’s Carbon Copy Cloner 4 is claimed to be fully compatible with Fusion Drives and CoreStorage LVGs, but these complicate matters, particularly with respect to the Recovery partition. TechTool Pro 8 does not appear to provide any tools for dealing with LVGs.
All tests and tools can be used safely with one important caveat.” That caveat is, of course, that it will not attempt to defragment the SSD in a Fusion Drive, nor indeed any SSD, as defragmenting solid-state drives is both pointless and shortens their working lives. Micromat claims that TechTool Pro 8 “officially supports Apple’s Fusion drive. Its documentation does not mention CoreStorage, LVGs, or Fusion Drives, though. Micromat’s TechTool Pro 8 is claimed to be compatible with El Capitan as well as Yosemite. No further information is provided about support for CoreStorage LVGs, and DiskWarrior appears to lack any features for addressing LVG issues. So which disk repair and other utilities are claimed to be compatible with a Mac which is running its boot drive as a CoreStorage LVG?Īlsoft’s DiskWarrior 5 is claimed to support “the latest Macs with Fusion drives”. But Disk Utility is not always successful, and has a limited range of tools compared to third-party utilities. Disk Utility version 15.0 which comes with El Capitan – and, perhaps more importantly, is available in its Recovery Drive – now has proper support for Fusion Drives and other CoreStorage Logical Volume Groups (LVGs).
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