System Preferences > Time Machine > backup destination contextual menu > verify

[Mac2013orlater]

Time Machine backup destination on SMB network share (within a sparse bundle on that share).
Actually how is the Verify Backup operation (mac's System Preferences > Time Machine > backup destination contextual menu + option key depressed > Verify Backup) implemented ?

Is this something like this ?

sudo hdiutil attach ...

followed by

sudo fsck_hfs ....

followed by

sudo hdiutil detach ....

Any other fashion?

Maybe just and only:

hdiutil verify ....

Neee, last one can't actually be as images with write access do not seem to include checksums used by hdiutil verify .... - according to hdiutil man page.

We plan to implement a replica of Verify Backup in shell script however lack information how reproduce it in shell script language. Is it possible to use mac's console to see lower-level operations resulting from choosing Verify Backup option? What to search for there?

 

[KALLT]

What are you exactly trying to achieve? Remote Time Machine destinations are verified periodically automatically.

 

[Mac2013orlater]

The goal is to have got the process of Time Machine backup increment production automated as far as possible. Currently it is carried out manually in all its steps: connect to network share, verify backup, start backup increment production, wait up till complete, verify again.

Time Machine here is in off state long haul. Increments are always started manually.

 

[Mac2013orlater]

Following log output is produced in

/var/log/fsck_hfs.log

in the time of execution and completion of Verify Backup from System Preferences > Time Machine > back destination context menu + option key depressed > Verify Backup:

Unfortunately exact arguments passed to fsck_hfs unclear, one might be QUICKCHECK-ONLY or so.

Backup increment generation (System Preferences > Time Machine > back destination context menu > Backup to "xxxx" now) is accompanied by fsck_hfs run too:

How to figure out more details about background process of manually triggered backup verification?