To me, it is much, much faster (and simpler) that trying to do that from a Time Machine backup. Finally, one can do 1) a complete Erase, Format, and if necessary, Partition the internal drive from the clone, and then either 2) do a restore of the clone to the internal drive, or 2) install a fresh version of the OS, and 3) use Migration Assistant to "migrate"/copy all the non-Apple stuff to the internal drive. Again, having them on a clone accomplishes that.Ĥ. If one has any of those more robust programs, for them to be effective on one's internal drive, they need to be booted externally. While one can boot to the Recovery Partition (assuming it got created) to access Disk Utility, it is much faster to boot to the clone, and run Disk Utility from there.ģ. Since some (most?) folks do not have a robust disk maintenance/repair program like Disk Warrior or Tech Tool Pro, they need to rely on Disk Utility for trying to do repairs. One can boot from the clone, and be back in business right away.Ģ. The main advantages of a backup/clone made with either SuperDuper! or Carbon Copy Cloner are:ġ. Standard troubleshooting techniques may localize problems to any of the items discussed here, as is the case with the enclosure in this thread. Physically, connection issues can be anywhere in the entire chain from computer (buses, ports, controlling hardware etc.) via connecting cables to peripheral hardware (enclosure, sATA device and associated controller boards). Connections/ports (USB, FW, Thunderbolt, cables etc.) matter because they are independent and independently fallible, in addition to having different specs and foibles. As any hardware item, enclosures may harbor problems separate from the items they enclose. You might also use an enclosure to house an internal drive you replaced with a larger one. Usually you purchase enclosure plus enclosed mechanism together as a single unit. An enclosure is a box housing (currently mostly) sATA-interfaced devices like HDs, optical drives etc., fitted with a power supply and an interface board for ports like USB, FW, Thunderbolt etc. For obvious reasons, having such clones located on separate hardware increases their usefulness. Clones are an option to preserve important data and (when bootable) to limit downtime to that of a restart. (Bootable) clones are independent and complete backups identical to the original that can be used when the regular boot drive malfunctions. I find this discussion ever so intriguing but utterly incomprehensible. Update: I just checked "Startup Disk" in system preferences and it offers either the main drive or the SD clone. Note: I have two Mercury enclosures (SD and Time Machine) but the TM enclosure is older (bought 2012). ![]() This then gave me four startup disk icons: I then shutdown and rebooted with the Option key. It offered either my main drive or the Super Duper clone. This opened with a dialogue box offering four choices:Īmong the items on the menu bar was "Startup Disk". ![]() Instead of seeing my main drive icon and the SD clone icon, I had the main drive icon with another drive icon called 10.8.5 Recovery. I shutdown and rebooted holding down the Option key. Things did not go as I would have expected. Your post got me to check how my Super Duper clone is working (SD 2.8 (v96)). I am an earlier OS (10.8.5), but my Super Duper backup is also on a Hitachi drive in an OWC Mercury enclosure (320GB HGST Travelstar Z7K320 2.5-inch 7mm SATA), although I am connected by Firewire 800. Is there any way to test the enclosure?ĪDDENDUM: When attempting to boot fro the clone, the progress bar goes about half way, stops, and the computer spontaneously shuts down. I feel that the hard drive is unlikely as the source of the issue because it is checked daily by Check Mate, with no problems found (file structure test, SMART, surface scan). I tried reconnecting via USB 3 but that was unsuccessful.Īt this point, I think that the problem may lie with either the enclosure or the hard drive. I have the enclosure connected via Thunderbolt. ![]() Disk Warrior reports minor issues (incorrect root correction date and repair of a custom flag for ScamZapper) but I have not run DW on the clone after re-doing the clone. ![]() The clone did boot, once, after running Repair Disk via Disk Utility but I think that that was coincidence. Erase the clone and re-clone from scratch. He had me try the following (all unsuccessful):ġ. I contacted Dave Nanian at Shirt Pocket (the developer of SuperDuper) and he has not seen this issue with El Capitan. After upgrading from Yosemite to El Capitan, the clone will not boot (although this may be coincidental). The clone is located in a Mercury enclosure on a Hitachi DeskStar 2 TB drive. I use the latest version of SuperDuper to make a clone.
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