Time Machine error code -36

On my Mac Pro 3,1 running OS X 10.6.8, I'm having a problem with Time Machine.


Some files were accidentally deleted from iTunes, I go into Time Machine and they're all there, but when I try to restore them it says that it can't be done because of error code -36.


It seems like it might be a permissions problem, and the internal 5Tb drive that I'm backing up to was not originally my own, but it is in my computer and is running under my own account, the administrator of the computer. The permissions of the folder in the drive where the Time Machine backup is located says that the admin can 'read only', but when I try to change that to 'read & write' it says, 'The operation can’t be completed. An unexpected error occurred (error code -8076).'


Any help most appreciated.

Posted on Jan 5, 2018 1:04 PM

Reply
7 replies

Jan 10, 2018 3:48 AM in response to Saltspring-Brian

Hello


I am no expert.


I have this problem too; I think it's a simple "catch 22" situation caused by having files that have been on a mac, copied to a Microsoft machine and back again. (It may not be all files but one in a batch that has had "background" files altered by this process is enough to halt a copy, move or recover command.) I suspect we will come to call this a "Catch 36" problem!


The "catch 22" is; There is a mildly corrupted file on your Mac, your Time Machine backs up (Time Machine files can't be altered by default so can't be cleaned by dot_clean in Terminal) Then the Mac refuses to restore/copy/move back from Time Machine as it reads the files as corrupted (they aren't corrupted they have just managed to acquire some residual information ("dot_") in some previous copying files process). This prevents restoring these files back to your Mac.


I suppose we should have both formatted our backup destination storage (Time Machine) to a Mac format at inception. Then kept away from Microsoft (as Apple seam to want us to do)


I have a MacBook Pro (running 10.9.5, 16GB RAM 1600mhz DDR3, Graphics
Intel Iris Pro 1536 MB.) but I partitioned and did a co-instal of High Sierra to see if this would be sophisticated enough to allow me to get around this but it isn't. I used to back up to a Lacie Thunderbolt 3TB, that is where all my back-up files reside.


Some files are able to copy back either individually or in small batches but if I inadvertently try with a file that is affected them my Mac just seizes!


I hope Apple can chip in here as it is a profound problem caused by us trusting our precious information to the Time Machine concept. If we had manually backed up to an external disk without Time Machine we could have run a simple command from "Terminal" to rectify this, Time Machine won't allow this.


Good luck


NH

Jan 13, 2018 3:03 PM in response to Saltspring-Brian

I think that Error Code 36 normally is a response by OSX when it tries to read files (or metadata accompanying a file) with ._ (or DOT_ which may be a normal code but only generated when copying/reading/editing ms-windows files) which it refuses to read - I make it sound like I know what I'm talking about but this is just what I've gleaned scouring this forum.


It doesn't seem to happen to everyone so it must be something related to particular circumstances.


Thanks

Jan 10, 2018 1:51 PM in response to Holmesway

Hello NH: My files were never on a Windows-formatted disk, or at least I don't think they were. The drive I'm using originally belonged to a friend who used it as his Time Machine backup disk - it's possible (but unlikely) that he just bought the drive (a 5Tb WD Black), it was already Windows formatted, and he dropped it into his MacPro and started using it. I was thinking that my problem might be something to do with a permissions problem because it was originally his drive - ALL of the files in the backup suffered the same problem, ALL seemed to be intact but could not be moved anywhere out of the backup, either manually or through Time Machine.


Since first posting I've found a solution to my immediate problem. I copied the entire backup to another disk, from where I could access the files without problems. I then reformatted the original backup drive, and created a new Time Machine backup on it. As of late last night, it completed the backup. As an experiment, I just tried restoring a file from the backup and I get the same message:

The Finder can’t complete the operation because some data in “received material” can’t be read or written.
(Error code -36)

The Catch 36 problem is Time Machine related, because I can copy files on and off the drive through the Finder without trouble.


It would be nice if Apple came up with some kind of an answer, but I'm not holding my breath.


Brian

Jan 13, 2018 12:08 PM in response to Saltspring-Brian

Yes, I understand the difference and maybe they are unrelated problems. Disk permissions and Time Machine's own encryption seem to be at the route of this for both of us. I haven't had time to contact Apple Support yet but I will and post their response too.


I did have a "mac formatted disk" not as I said earlier "microsoft formatted" so that rules out another possible cause.


Thanks

Jan 5, 2018 1:08 PM in response to Saltspring-Brian

I just check out the backup disk with Disk Utilities and it reports that it's okay.


Verifying volume “RD-**”

Performing live verification.

Checking Journaled HFS Plus volume.

Checking extents overflow file.

Checking catalog file.

Checking multi-linked files.

Checking catalog hierarchy.

Checking extended attributes file.

Checking multi-linked directories.

Checking volume bitmap.

Checking volume information.

The volume RD-** appears to be OK.

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Time Machine error code -36

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