Our solution (until the patch release goes GA) was to go with mtime over ctime (as recommended by NetApp). ndmpd ignore_ctime seems to correct this problem and we have seen our differential backups fall from 80GB per night to under 10GB per night.

-Robert

-----Original Message----- From: neil lehrer [mailto:nlehrer@ibb.gov] Sent: Monday, March 04, 2002 6:34 PM To: Adrian Phillips Cc: 'Wiebke, Robert (Robert)'; Toaster List Subject: Re: Reset of Archive bit causing very large backups

are these backups ndmp?

Adrian Phillips wrote:

Hi Robert;

We were having the same issue with our backups (Also using Veritas, though

it was/is Backup Exec 8.5). The solution is to upgrade to 6.1R1P1D9 (or later). Bug # is 49892.

The other suggestion / solution is through the Veritas s/w, with the

suggestion of changing the job from incremental/differential to Daily or Working Set, which would back up files changed in the last x days.

Cheers, -Adrian

ps - our filer is an F760...

-----Original Message----- From: Wiebke, Robert (Robert) [mailto:wiebke@lucent.com] Sent: Tuesday, February 19, 2002 9:08 AM To: Toaster List Subject: Reset of Archive bit causing very large backups

Hello Toasters,

We are running 5.3.6r1 on our main Filer 740 and we have noticed very

large

differential backups lately. A full backup will take up approx. 340GB of tape, however our differential backups are taking up on average 80GB.

Last

week we saw two consecutive differential backups of 240GB and 340GB.

I've spoken to Veritas (Using Datacenter 3.4 with a W2K master server) and they tell me the backups themselves are accurate. While investigating

this

we noticed that files not accessed in a long time (6+ months) were still showing their archive bits set. As these files have not been changed in sometime the archive bit would be expected to not be set. Sure enough, on all files we looked at, the archive bit was set on all.

Is this a bug? Is this documented and is a fix available? I've opened a case with the NOW site, and as of yet I have not heard from them. Would

you

expect an 80GB differental backup on a 340GB filer? Even on weekends when less data was being accessed?

Any comments appreciated. Thanks!