I have seen this non-booting behavior with USB3 drives connected through a Thunderbolt connection to a Mac that does not support USB3 natively. They can be mounted through TB, but only after the machine has booted, making it impossible to boot off those drives.
I suspect that (making the huge assumption that it is not defective) the Iomega FW chip does not support booting. I just checked this device's customer reviews on Amazon: http://www.amazon.com/Iomega-Companion-External-35130-Silver/product-reviews /B00576T1GG I've never seen such hate for a single piece of equipment. You would probably be better off returning it if you can, or just throwing it away if you cannot. On 5/18/16, 7:29 PM, "Eric Volker" <[email protected]> wrote: > Well I got the enclosure, but things didn¹t go as planned. I got a deal on an > enclosure that had once been an Iomega Mac Companion. I installed the SSD, > hooked the enclosure up to my Firewire 800 port and it showed up on the > desktop. I installed El Capitan and rebooted, but when the Mac rebooted it > came up from the internal drive not the external one. Holding down Option > while booting showed only the internal drive. The Firewire drive is visible in > the Startup Disk preference panel, but selecting it accomplishes nothing. > Rebooting it just comes up on the internal drive. > > Now for the fun part. It *will* boot if I hook up the drive via USB 2.0. > However, that¹s pretty slow and I got this enclosure for the faster Firewire > 800 port. Another curiosity is that the disk shows up as ³External RAID Media² > in Disk Utility. It is assuredly not RAID, just a single 256GB SSD. Could this > be the problem? > > I¹m in the process of testing the SSD over USB, but results so far are mixed. > Any thoughts on getting Firewire working? -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/imaclist --- You received this message because you are subscribed to the Google Groups "iMac Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
