Internal disk needs repair

I think I am in the same boat as Internal disk needs repair - Apple Community.


I saw LaPastenague's response. Unless there is any additional guidance, I will pull the drive out and check.

Posted on May 8, 2020 10:49 AM

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Posted on May 8, 2020 2:58 PM

For the moment.. you can pull the bad drive from the Gen5 TC.

If you don't replace it you will get a bad drive error but it will continue to work as an Extreme.


You can bridge the Gen4 TC, plug it into the Gen5 and run it just for backups. They are just as fast as the Gen5 but of course only have N wireless which you can turn off.


As a matter of interest I have used WD purple drives (designed for surveillance work) and they are a good choice in TC. I have not heard they went SMR and as long as it has the same model number as older ones they are fine. As are the older WD Reds.. just buy ones that have model number ending FRX not FAX ?? I think those are the numbers.

BTW HGST is owned by WD now.. just in case your issue is with WD itself.

32 replies

May 12, 2020 12:26 PM in response to Bob Timmons

I currently have


  • A 2010 Mini Server - USB2, No Thunderbolt, Firewire800
  • A 2012 Mini Server - USB3, Thunderbolt 1 (10Gbps)
  • A 2018 Mini - USBc/TB3


I can use any of the Minis as servers with attached storage and use these as Time Machine servers. My thought process is to leave the TC as is, and instead, invest in DAS and build my own TM farm. I have a paid-for server license.


May 12, 2020 4:54 PM in response to LaPastenague

It is good for me to have this conversation with you and Bob, which helps me get ideas on replacing aging equipment.


After Sierra (10.12.x), Apple chose to decimate the Server product, which has been lamented by many. I have the 'full' Sierra server.


I have been using the Server Time Machine since Mountain Lion (10.8.5) on a 2012 Mini, and had planned to replace Time Capsules with it, once the TCs started running into issues. My plan was to upgrade this Mini to Sierra, get a Thunderbolt (1/2) disk array as well as use the 2018 Mini (with the free TM server) and start migrating away from the 11ac TCs. If the disks in TCs become problematic, I had much rather continue using them as Extremes, till they completely fail.


Right now I have


  • 2 x 1.5Tb Iomega disks
  • 2 x 5Tb Seagate Backup products (Not very fond of these though)


May 23, 2020 3:31 PM in response to LaPastenague

I have come this far - https://imgur.com/a/vQ1uaZk. The two connectors shown (2 and 3) in https://www.ifixit.com/Guide/Airport+Time+Capsule+A1470+Hard+Drive+Replacement/61924 make me very nervous. They look very fragile.


The design would have been lot better if these two were routed along the periphery of the TC, instead of over the disk. I will provide updates as I progress.

May 24, 2020 5:24 PM in response to Loner T

I am looking at Red-10TB-Internal-Hard-Drive which states that it is a CMR drive, but seems to be an FAX rather than a FRX drive.


SMR in the FAX series covers 1TB-6TB

The 8TB and larger are still CMR drives. (From info I read)


Drive costs are sky high.. no doubt about it. Supply and demand.

If you can get away with smaller drive and even buying second hand do it. Drive prices will come down once the world starts working again.


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Internal disk needs repair

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