Backup Errors

[bcort]

What should I do about backup errors such as the following?

 

- can't read, error -1020 (sharing violation)

- didn't compare

- different modify date/time

 

Here is the execution log:

 

+ Normal backup using FullComputerA at 30/04/2010 4:00 AM

To Backup Set FullComputerA...

Can't use Open File Backup option for Local Disk (C:), error -1017 (insufficient permissions)

 

- 30/04/2010 4:00:16 AM: Copying Local Disk (C:)

File "C:\Documents and Settings\All Users\Application Data\Microsoft\Search\Data\Applications\Windows\MSS.log": can't read, error -1020 (sharing violation)

File "C:\Documents and Settings\All Users\Application Data\Microsoft\Search\Data\Applications\Windows\MSStmp.log": can't read, error -1020 (sharing violation)

File "C:\Documents and Settings\All Users\Application Data\Microsoft\Search\Data\Applications\Windows\tmp.edb": can't read, error -1020 (sharing violation)

File "C:\Documents and Settings\All Users\Application Data\Microsoft\Search\Data\Applications\Windows\Windows.edb": can't read, error -1020 (sharing violation)

File "C:\Documents and Settings\All Users\Application Data\Microsoft\Search\Data\Temp\usgthrsvc\Perflib_Perfdata_b74.dat": can't read, error -1020 (sharing violation)

File "C:\Documents and Settings\Bob\Application Data\Mozilla\Firefox\Profiles\mrwve7p6.default\parent.lock": can't read, error -1020 (sharing violation)

File "C:\Documents and Settings\Diane\Application Data\Mozilla\Firefox\Profiles\4gxqpu4w.default\parent.lock": can't read, error -1020 (sharing violation)

File "C:\WINDOWS\Temp\Perflib_Perfdata_370.dat": can't read, error -1020 (sharing violation)

File "C:\WINDOWS\Temp\Perflib_Perfdata_bd8.dat": can't read, error -1020 (sharing violation)

File "C:\WINDOWS\Temp\_avast4_\Webshlock.txt": can't read, error -1020 (sharing violation)

30/04/2010 4:08:22 AM: Snapshot stored, 96.9 MB

30/04/2010 4:08:26 AM: Comparing Local Disk (C:)

File "C:\Documents and Settings\Bob\Application Data\Mozilla\Firefox\Profiles\mrwve7p6.default\cookies.sqlite": didn't compare

File "C:\Documents and Settings\Bob\Application Data\Mozilla\Firefox\Profiles\mrwve7p6.default\cookies.sqlite-journal": didn't compare

File "C:\Documents and Settings\Bob\Application Data\Mozilla\Firefox\Profiles\mrwve7p6.default\places.sqlite-journal": different modify date/time (set: 30/04/2010 4:02:25 AM, vol: 30/04/2010 4:08:25 AM)

File "C:\Documents and Settings\Bob\Application Data\Mozilla\Firefox\Profiles\mrwve7p6.default\ybookmarks.sqlite": didn't compare

File "C:\Documents and Settings\Bob\Application Data\Mozilla\Firefox\Profiles\mrwve7p6.default\ybookmarks@yahoo.log": different modify date/time (set: 30/04/2010 4:01:43 AM, vol: 30/04/2010 4:08:42 AM)

File "C:\Documents and Settings\Diane\Application Data\Mozilla\Firefox\Profiles\4gxqpu4w.default\places.sqlite": different modify date/time (set: 30/04/2010 4:01:42 AM, vol: 30/04/2010 4:09:43 AM)

File "C:\Documents and Settings\Diane\Application Data\Mozilla\Firefox\Profiles\4gxqpu4w.default\places.sqlite-journal": different modify date/time (set: 30/04/2010 4:01:43 AM, vol: 30/04/2010 4:09:43 AM)

File "C:\Documents and Settings\Diane\Application Data\Mozilla\Firefox\Profiles\4gxqpu4w.default\prefs.js": different creation date/time (set: 30/04/2010 3:41:42 AM, vol: 30/04/2010 4:05:42 AM)

File "C:\Program Files\PostgreSQL\8.4\data\pg_stat_tmp\pgstat.stat": different creation date/time (set: 30/04/2010 4:03:19 AM, vol: 30/04/2010 4:10:19 AM)

File "C:\WINDOWS\Prefetch\RTHLPSVC.EXE-1FFC0813.pf": different modify date/time (set: 30/04/2010 4:00:18 AM, vol: 30/04/2010 4:05:20 AM)

File "C:\WINDOWS\system32\wbem\Logs\wbemcore.log": different modify date/time (set: 30/04/2010 4:05:09 AM, vol: 30/04/2010 4:11:37 AM)

30/04/2010 4:11:54 AM: 17 execution errors

Completed: 10187 files, 5.4 GB

Performance: 1680.7 MB/minute (1770.6 copy, 1599.5 compare)

Duration: 00:11:38 (00:05:04 idle/loading/preparing)

 

 

[rhwalker]

What should I do about backup errors such as the following?

 

- can't read, error -1020 (sharing violation)

- didn't compare

- different modify date/time

I can't answer the sharing violation question because that requires information not provided (privilege / ACL information for the files in question).

 

However, for the compare and modify date/time files, if you look at those files, you can see that they are log files and preference files, etc., that were changing between the time the backup was made and the verification pass.

 

If you want to "do something" about this, you have a few choices.

 

(1) take down the system (or the relevant services / programs) before doing the backup so that there is not any activity going on that would cause files to change; or

 

(2) have those programs make a "snapshot" (different from Retrospect's usage of the term) prior to your backup, and then back up the copy / snapshot - that's what we do with our mail server, which is always churning its database as it processes emails - we shut down the mail service for a moment (our secondary MX catches emails during that moment), we have the email server clone its database, we restart the mail service, and then Retrospect backs up the cloned mail database that was taken while the mail server was quiet; or

 

(3) don't do a verify pass, but instead use Retrospect's MD5 verification, which saves an MD5 polynomial calculation of the file it backed up, and then recomputes that MD5 calculation on the version it retrieves from the backup, and compares that rather than looking at the (possibly changed) file on disk at the time of the verification pass; or

 

(4) examine your error log each day and use judgment to decide whether the errors are significant;

 

etc.

 

Hope this helps.

 

Russ

[smartsolve]

The Knowledgebase article #5595 addresses the "permissions" (-1017) error:

"Windows XP, 2003 and Vista-

Retrospect uses the Microsoft Volume Shadow Copy Service (VSS) to backup open files. If your log reports an error "Can't Use Open File Backup for C: error -1017 Insufficient Permissions", then the VSS Service is failing to work correctly on your computer. Check the Windows Event Log on the source computer for VSS errors. You can then use the Windows Event ID to identify the cause of the VSS Failure and consult with Microsoft for a solution."

 

[smartsolve]

Additional information on the VSS - just located this KB article (#9631) - see http://kb.dantz.com/display/2/_index1.asp?tab=faq&c=12&cpc=5GSK8V331KGNkyd4x263e7QPl325RA1mX&cid=2&r=0.5777857 for the article. It is entitled "Can't use Open File Backup for Drive C, Error -1017 Insufficient Permissions" in case the link does not work. However, it indicates that the -1020 errors could well be resolved if the VSS problem is corrected such that the -1017 error is eliminated. Hope this helps you!

[bcort]

Thank you, there are indeed system errors with VSS that I am looking into.