Thread re-opened to add a new learning - - Time Machine only does “verification” of data on a network drive (such as Time Capsule). I assume this means sparse bundle backups.
TM backups on local drives (internal or external) have the manual "verify now” option greyed out. I assume this is the backups.backupdb file format. Alan > On 2 May 2018, at 10:32 am, Alan Smith <[email protected]> wrote: > > To close off this thread and create a log as a memory tickler for next time - > -. > > TM Sparse bundle version: After failed verification all history is lost and > a new backup created. If the history is valuable then editing of the sparse > bundle may be warranted. I understand it is possible but it is not simple. I > didn’t save the corrupted file. > > TM Backups.backupdb version: Data looks as if it could be easily edited to > remove single or multiple days. I did not investigate the process for doing > this. > > Alan > > >> On 29 Apr 2018, at 11:12 pm, Alan Smith <[email protected]> wrote: >> >> I run duplicate Time Machine backups, one to a local drive and the other >> (sparse bundle format) to the Time capsule network drive. I got a screen >> notification to the effect that verification had failed and TM needed to >> create a new backup. I clicked on the “tell me again tomorrow” button. It >> seems that verification happens when the daily, weekly and monthly >> consolidation is done. >> >> Do I lose the complete backup history by accepting the notification >> tomorrow? Can I manually delete the backup data between 26-29 April (or the >> combined weekly or monthly file) and retain earlier history? While TM was >> “off” for most of those days, some backups were created during my repair and >> restoration (ongoing!) work in readiness for installing High Sierra. If all >> data is lost then it would be more convenient to manually delete the sparse >> bundle and create a brand new backup when I have time. It’s not worth the >> effort to try repairing the sparse bundle. >> >> I haven’t tempted fate by running a manual verification on the second TM >> backup which creates backups.backupdb files. >> >> Cheers >> Alan >> iMac late 2009, OSX 10.9.5 Mavericks. >> -- The WA Macintosh User Group Mailing List -- >> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >> Settings & Unsubscribe - >> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
