Running First Aid on External Time Machine Drive

simpsong00 wrote:

First Aid says:

Running First Aid on “TARDIS” (disk5s2)

Checking file system and repairing if necessary and if possible.

Volume was successfully unmounted.

Performing fsck_apfs -y -x /dev/rdisk5s2

Checking the container superblock.

Checking the checkpoint with transaction ID 2407143.

Checking the space manager.

warning: spaceman main free count 1023602502 does not match sum of free counts 1023606363

Checking the space manager free queue trees.

Checking the object map.

Checking volume /dev/rdisk5s2.

Checking the APFS volume superblock.

The volume TARDIS was formatted by diskmanagementd (2142.120.7) and last modified by apfs_kext (2235.80.4.0.1).

Checking the object map.

error: btn: oid (185678764), xid (2392679), type (0x40000003), subtype (0xb), flags (0x6) level (0)

error: btn: invalid key order: index 59 is greater than maxkey (should be less than)

index 58 key : 72 50 07 00 00 00 00 00 fc 37 0e 00 00 00 00 00

index 59 key : 72 50 07 00 00 00 00 00 95 46 0e 00 00 00 00 00

maxkey : b6 31 06 00 00 00 00 00 45 0e 0f 00 00 00 00 00

Object map is invalid.

The volume /dev/rdisk5s2 with UUID D2721CD7-6260-4850-81CB-9CB20C228187 was found to be corrupt and cannot be repaired.

Verifying allocated space.

error: cib: ci_free_count (4210) is not valid (349) (ci_addr 0xbf30000)

The volume /dev/rdisk5s2 with UUID D2721CD7-6260-4850-81CB-9CB20C228187 could not be verified completely.

File system check exit code is 8.

Restoring the original state found as mounted.

File system verify or repair failed. : (-69845)

Operation failed…

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So, do you think I can reformat this drive and use it again, or should it be disposed of?

I would think at this point it may be worth a shot since it is messed up anyway and can't backup. Though, depending on how old the drive is it may be time to get a new one.

To help get a better idea of where that error is coming from, get and run EtreCheckPro. https://etrecheck.com/en/index.html

Then post back here with your EtreCheckPro Report if you need help deciphering the Report.

https://discussions.apple.com/docs/DOC-250000211

simpsong00 wrote:

So, do you think I can reformat this drive and use it again, or should it be disposed of?

Sorry our post crossed and I'm a slow typer.

Yes you can Erase, Format and Start new backups. However, I suspect that there is something else going on there and I recommend that you generate and post an EtreCheckPro Report.

With the old TM drive connected, go up to the menu bar and click on the Time Machine icon.

1. Tell us the date of the Latest Backup to "Time Machine"
2. Tell us what happens when you click on Back Up Now.