Hi Stephen, No direct experience but you are obviously not alone:
Googling problems with External Drives and El Capitan shows up LOTS of hits some seem to confirm a compatibility problem between El Capitan and some external drives including Iomega. I haven¹t delved too deep into these posts but typically when googling these problems you find: * Some which are irrelevant (different problem) * Some which may be relevant but aren¹t too useful. * Some which seem to describe the same problem but are still unsolved. * Some which seem to describe the same problem and describe solutions which have worked for some people. Occasionally, in the last category, I find solutions that work for me ;o) One post which was raised about a Iomega Helium 1Tb disk and which seems relevant is here: <https://discussions.apple.com/thread/7258451?start=0&tstart=0> One guy (not the original poster) reports: My Iomega drive is also not recognized under El Capitan. Works fine on Yosemite. I took it into the Apple Store and they confirmed it doesn't work on any of their El Capitan machines either. Looks like it is a compatibility issue. Haven't found a work around yet. Have you checked to see if the disk(s) are still recognised/mountable on a Yosemite machine? If so, it might avoid the sledge-hammer if you can wipe the disk under Yosemite and find a good home with a Yosemite (or earlier) machine. Actually, the same guy then reports a solution: > I Spoke to the Iomega guys last night. The only thing they could think of was > that Apple may (for some unknown reason) have reduced the USB port voltage > with El Capitan. They suggested attaching a USB power supply to the drive's > secondary port on the Y cable and seeing if that fixes the problem. I'm > traveling right now so won't be able to test until tomorrow. and then: > I tested it and it worked. I used a Lithium Ion USB battery (the kind you use > to recharge your phone on the go) and connected it to the spare pigtail on the > Y cable. The drive was immediately recognized in El Capitan. Looks like it > is definitely a current/voltage problem on the USB port on the Mac - looks > like the OS changed something. Of course, this may not be YOUR problem but worth a try? On another forum <http://forums.macrumors.com/threads/external-hard-drives-dont-show-up-in-el -capitan-unresolved.1891746/page-2> One guy says: > I had this problem as well - my late 2013 iMac did not recognize external USB > drive after I upgraded to OS X 10.11 El Capitan. After restarting several > times with no success, I moved the external drive to my Airport Extreme base > station, which has a USB port of its own, and I was able to access it via WiFi > in Finder. > Subsequent to that, I moved the external drive back to the USB port on my > iMac, and voila, it finally appeared on my desktop and in Finder, like normal. > Not sure if moving it to the Airport Extreme to access it wirelessly had > anything to do with it, but I thought I'd post this, in case it helps someone > else. Do know, at least, that you can access your external hard drive data via > WiFi if you really need to get to it. This could also indicate for the USB problem (above) - since the Airport Extreme would still be outputting the original USB voltage. Somebody else had this to say: > It seems that the os is trying to repair the external disk (see the fsck_??? > process in the activity monitor - with 99%) from the moment it is connected in > the usb. I killed the process and the disk were mounted but in read only mode. > After that I reconnect the drive and waited for the process to end, and after > some minutes (~10) it appeared mounted on the desktop. > > After the long wait, I never encountered the same problem with the external > disk again. This post runs to 4 pages and many different types of disk and many other ³solutions² - I will not bore by listing them all here but you may find it worth reading through and trying some of them...? HTH Cheers Neil -- Neil R. Houghton Albany, Western Australia Tel: +61 8 9841 6063 Email: n...@possumology.com on 7/5/16 10:03, Stephen Chape at chap...@bigpond.com wrote: > Hi Ronni, > We are certain that this is not the case because both are failing to mount. > And neither were encrypting at the time of the Dubai El Capitan update. > In fact one was in my safe in Perth. > Any combination of either HD > Circumstances point to an issue with these Iomega drives resulting from the El > Capitan update. > They are both the same brand & type. > > The only place we can see the drive is in Disk Utility but every option in DU > fails. > > We are close to exhausting our options so the sledge hammer may be our last. > > > >> On 6 May 2016, at 4:51 PM, Ronda Brown <ro...@mac.com> wrote: >> >> Hi Stephen, >> >> Just a thought... " >> "The disk you inserted was not readable by this computer." >> I read somewhere about this happening to a guy and he finally worked out >> while it happened and was able to correct it. I kept a note about it... >> The solution to this person's encrypted drive not readable in El Capitan was: >> >> /Begin Quote: >> "I just figured my issue out, my 5TB drive was in process of being encrypted >> when I updated to El Capitan, and that was the reason why I couldn't use it. >> I plugged it into my mac running older version of OS and allowed it to finish >> the encryption. Once that was done I was able to use the drive on El Capitan" >> /End Quote: >> >> Cheers, >> Ronni >> Sent from Ronni's iPad4 >> >> >> On 6 May 2016, at 3:52 PM, Stephen Chape <chap...@bigpond.com> wrote: >> >>> Hi Peter and thank you. >>> He needs to encrypt the HD¹s because he is an Emirates Captain and sometimes >>> carries one of them with him to different countries around the world. The HD >>> also carries some data that may be privy only to Senior Emirates Staff. That >>> is apparently the reason for the encryption. >>> >>> With regard to the issue at hand. >>> We both thought that Drive #1 (the one he brought over from Dubai) had died. >>> Because when he brought it to Perth and I plugged it into my iMac we got the >>> same result as on his iMac. >>> So we have the same issue on the same drive but on 2 different iMacs. >>> >>> Then he took Drive #2 back to Dubai and when he plugged it into his iMac got >>> the same result. >>> So now we have 2 different drives with the same issue on the same iMac (his >>> iMac). >>> >>> My iMac has had El Capitan installed since a few days after that OSX >>> release. >>> But this is the first time I have plugged one of these drives into it since >>> then. >>> >>> His iMac had El Capitan installed last week and this is the first time he >>> has plugged in both drives since the OSX update. >>> So now the common factor seems to be El Capitan. >>> >>> >>> >>> >>>> On 6 May 2016, at 7:45 AM, Peter Hinchliffe <hinch...@multiline.com.au> >>>> wrote: >>>> >>>> >>>>> On 5 May 2016, at 10:37 AM, Stephen Chape <chap...@bigpond.com> wrote: >>>>> >>>>> Hi folks, >>>>> >>>>> My step son lives in Dubai and each time he visits he brings his HD for me >>>>> to swap with the one in my safe. >>>>> It contains an encrypted SuperDuper backup. >>>>> He has two of these and swaps them over on each visit. >>>>> >>>>> A few days ago he brought it over as usual, but told me it seemed to have >>>>> died because was giving this message: >>>>> >>>>> The disk you inserted was not readable by this computer >>>>> Options given were: Initialise, Ignore or Eject. >>>>> >>>>> When I plugged into my iMac the same message appeared, so we thought this >>>>> was confirmation of death. >>>>> >>>>> However he has just returned to Dubai and got the same message with the >>>>> alternate HD he took back with him. >>>>> He tells me he has spoken to Iomega support but they were unable to help >>>>> in any way. >>>>> Interestingly he upgraded his iMac to El Capitan last week and I also run >>>>> El Capitan on my iMac. >>>>> >>>>> Any suggestions would be of great assistance please ? >>>>> >>>>> PS: Lucky I did not take the hammer to the HD he left with me as he had >>>>> suggested ! >>>>> >>>>> Regards, >>>>> Stephen Chape >>>>> >>>> >>>> You probably won¹t sort this out unless you invest in some serious HD >>>> utility software. Drive Genius, Techtool Pro or Data Rescue (to recover the >>>> data, not to repair the drive) come to mind immediately, but even then >>>> there¹s no guarantee that they can fix whatever the problem is. The fact >>>> that the backup is encrypted is a real worry, and one that no HD Utility >>>> will overcome if the encryption key has become corrupted. >>>> >>>> The problem could also lie with the decryption software on your computer. >>>> If you cant recover that key you might as well just reformat the disks. >>>> Just establish that his computer can read the disks or not before tsking >>>> that drastic step. If it can, then problem is definitely with your >>>> computer. He¹ll have find a way of making a copy of the disks. Just make >>>> sure the copies are not encrypted. Unless he¹s protecting Fort Knox I can¹t >>>> see a convincing reason for encrypting a back up drive, especially if he's >>>> going between computers. It certainly doesn¹t protect the data itself: it >>>> just hides it from potential prying eyes. >>>> >>>> Peter Hinchliffe Apwin Computer Services >>>> FileMaker Pro Solutions Developer >>>> Perth, Western Australia >>>> Phone (618) 9332 6482 Mob 0403 046 948 >>>> -------------------------------------------------------------------- >>>> Mac because I prefer it -- Windows because I have to. >> -- The WA Macintosh User Group Mailing List -- >> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >> Settings & Unsubscribe - >> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> > > > Regards, > Stephen Chape
-- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
