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Question: High Sierra has bricked 2 HDDs, now what?

I was using a USB3 HDD to act as my local files space for my cloud backup. Upgrading to High Sierra went smoothly until the HDD stopped being recognised. This varied from the finder telling 'disk type not recognised, please initialise' to Disk Utility not seeing the drive at all (the drive clicks and whirs so gets power).


I though OK, let's cut my losses so bought the exact same drive (Seagate Expansion Portable Drive 1TB). Arrived loaded with the default software. Did what I always do i.e. erase with Disk Utility. Did that, at which point the disk unmounted and is as dead and invisible to Disk Utility as the first one. ***?


Any suggestions?


Thanks

MacBook Pro with Retina display, macOS High Sierra (10.13.1), i5 - 16/1024

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Nov 17, 2017 4:46 AM in response to Moscool In response to Moscool

High Sierras Disk Utility has one new 'feature', by default the sidebar in Disk Utility will only show Volumes and not Disks. To see the Disk click View in Disk Utilities menubar and then select Show All Devices, you should now see the Disk and the Volume(s) indented in the sidebar. To format the disk select the Disk not the Volume and select Erase and set the GUID Partition Map and Mac OS Extended (Journaled, same as you had done prior to High Sierra.


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Nov 17, 2017 10:02 AM in response to Moscool In response to Moscool

I think you did everything right, everything I would have done anyway. I bought a Seagate drive yesterday (not that exact model though) and had no trouble formatting it for use as a Time Machine backup.


Did what I always do i.e. erase with Disk Utility.


Do you recall the format you used? I used GUID Partition Map and Mac OS Extended (Journaled, Encrypted) as in Eau Rouge's instructions.


Whether the problem is due to Seagate's firmware or Disk Utility cannot be determined. In any event I'd try a different manufacturer until they sort out whatever's wrong.

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Question marked as Helpful

Nov 17, 2017 4:46 AM in response to Moscool In response to Moscool

High Sierras Disk Utility has one new 'feature', by default the sidebar in Disk Utility will only show Volumes and not Disks. To see the Disk click View in Disk Utilities menubar and then select Show All Devices, you should now see the Disk and the Volume(s) indented in the sidebar. To format the disk select the Disk not the Volume and select Erase and set the GUID Partition Map and Mac OS Extended (Journaled, same as you had done prior to High Sierra.


User uploaded file

Nov 17, 2017 4:46 AM

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Nov 17, 2017 8:22 AM in response to Moscool In response to Moscool

UPDATE: This is getting weirder


After about 20 minutes being connected, the HD miraculously reappeared on in Disk Utility (as a Device). At this point I reformatted it using the defaults values and GUID. After a few moments I got an error message and the disk disappeared again! I has now been connected for another 30 minute and reappeared... I've relaunched the operation and it seems to get stuck at the unmounting disk stage. During that time it appears in the Terminal list (see screenshot)


User uploaded fileUser uploaded file


What do I make of this?!


(BTW, still stuck at the same stage 10 minutes later)

Nov 17, 2017 8:22 AM

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Nov 17, 2017 10:02 AM in response to Moscool In response to Moscool

I think you did everything right, everything I would have done anyway. I bought a Seagate drive yesterday (not that exact model though) and had no trouble formatting it for use as a Time Machine backup.


Did what I always do i.e. erase with Disk Utility.


Do you recall the format you used? I used GUID Partition Map and Mac OS Extended (Journaled, Encrypted) as in Eau Rouge's instructions.


Whether the problem is due to Seagate's firmware or Disk Utility cannot be determined. In any event I'd try a different manufacturer until they sort out whatever's wrong.

Nov 17, 2017 10:02 AM

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Nov 17, 2017 10:46 AM in response to Moscool In response to Moscool

I agree; I won't miss them one bit. Seagate isn't any better or worse than any other manufacturer. They're pretty much all cheap disposable junk. The only exception to that might have been Hitachi / HGST, whose drives were statistically more reliable than others, but they recently sold their drive division to Western Digital.


For what it's worth I generally purchase only bare drives and put them in enclosures myself, because most enclosures don't meet my requirements.

Edit to add: come to think of it the problems you describe might be due to the enclosure. I can't imagine the drive itself could cause those problems. That doesn't mean you shouldn't return it and try another manufacturer though.

Nov 17, 2017 10:46 AM

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Nov 21, 2017 1:49 AM in response to Moscool In response to Moscool

Final update:


One disk came back the other went back...


The first one didn't respond at all and was definitely bricked... as if I had disconnected it while its head was writing - except I haven't! The other was resuscitated using the 'Device' view. Thanks to all for your help.


Francois

Nov 21, 2017 1:49 AM

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Question: High Sierra has bricked 2 HDDs, now what?