All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com

Thank you for buying via links and ads on this site,
which earn me advertising fees or commissions.
As an Amazon Associate I earn from qualifying purchases.

Other World Computing...
B&H Photo...
Amazon
As an Amazon Associate I earn from qualifying purchases.
Upgrade the memory of your 2018 Mac mini up to 64GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$3498 $3498
SAVE $click

$3699 $1299
SAVE $2400

$1000 $700
SAVE $300

$3899 $1499
SAVE $2400

$748 $648
SAVE $100

$2999 $1999
SAVE $1000

$1699 $899
SAVE $800

$1698 $1398
SAVE $300

$4499 $3499
SAVE $1000

$1399 $1049
SAVE $350

$1149 $799
SAVE $350

$1399 $1049
SAVE $350

$1498 $1198
SAVE $300

$2797 $2597
SAVE $200

$280 $250
SAVE $30

$700 $500
SAVE $200

$1699 $1299
SAVE $400

$8399 $7599
SAVE $800

$899 $799
SAVE $100

$1699 $1299
SAVE $400

Apple Core Rot Strikes Again: Time Machine Wipes Out Other Backups and Fails to Restore Properly

Recently I wiped out most applications in my applications folder due to a nasty habit of the command line 'rm' to follow symlinks. Ignore that if you don’t know what it means, the key point is that I lost all my applications on the boot drive except for Apple standard ones, and I wanted them back.

I keep more than one clone backup around, including clones of the boot drive. I should have just used those but for whatever reason I tried using Time Machine to restore apps. Big mistake.

In directing Time Machine to restore an application in the applications folder to my boot drive, I found the following behavior. I was very confused until I figured out what was actually happening.

  • When I directed Time Machine to restore an application (e.g., Microsoft Office), it would falsely claim that it already existed (see dialog below), then restore to the wrong volume, overwriting one of my clone backups. The false claim that the folder already exists occurs because that TM was attempting to restore to the wrong volume (one of my backup clone volumes).
  • With two clone backup drives attached, Time Machine seemingly picks one at random to restore to, which means DATA DESTRUCTION, , overwriting that volume even while it fails to restore to the correct location. If that volume is dismounted, it picks another other one to destroy stuff on and so on. Hence it is wise to unmount all other backup volumes.
  • If and only if the backup volumes are dismounted does it restore to the boot volume that I requested in the first place.

I could reproduce this bug over and over, watching while Time Machine would wipe out things on my other backup drives, while failing to restore to the boot drive. I don’t know all the ramifications, but MPG recommends that users exercise extreme caution when restoring with Time Machine if there are other mounted backup volumes present (dismount and disconnect all other volumes as a precaution).

Apple’s Time Machine has had many serious bugs over the years, and here in 2017 it is worse than ever. This is Apple Core Rot at its very worst.

Attempting to restore a missing application,
Time Machine is about to overwrite the wrong volume
Time Machine busily wiping out a backup drive by restoring to the wrong volume

Spoon with macOS High Sierra we are supposed to trust the new APFS new file system? From a company that cannot even restore a backup properly? MPG strongly recommends against using APFS (macOS High Sierra) until it is out for a goodly amount of time. Apple cannot be trusted to test its software; don’t be a guinea pig.

Peter F writes:

Something a bit similar happens on a Mac Mini I have when doing system updates. The Mac Mini (2012) boots off an external SSD usb drive. I usually have a firewire external hard drive attached on which is a clone backup. If the external clone drive is disconnected before the update begins all goes well. If I forget and leave the clone drive connected the update fails and it appears both boot drive and clone drive are badly affected and become unusable. To restore things to the prior state I have been able to use a second firewire clone drive (kept physically separate) to repair the boot drive and then update again with only the usb boot drive attached. The Mac Mini runs on Sierra. Not sure when this problem started but only noticed it with Sierra. It has happened a few times - each time I have forgotten to disconnect the clone drive.

MPG: Time Machine is broken and destroys data by whacking the wrong volume.

OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
OWC Envoy Express

World’s first Thunderbolt 3 M.2 NVME SSD enclosure.

Super fast, bus-powered, 3.3 oz, DIY easy, rugged and compact!


See also OWC Express 4M2
√ No more slow and noisy hard drives!

MacPerformanceGuide.com
View all handpicked deals...

Canon EOS 5DS DSLR Camera (Body Only)
$3699 $1299
SAVE $2400

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__