"NVRAM config last updated" unchanged after save

[sasha]

Hello. I have an odd situation on my Cat6500 with 12.2(33)SXI IOS. Time after "NVRAM config last updated" does not change when I issue "copy run start":

! Last configuration change at 12:21:09 CEST Thu Oct 8 2015 by admin
! NVRAM config last updated at 10:22:05 CEST Wed Jun 3 2015 by admin

The same is displayed in both running and startup config. Configuration is actually saved - "more nvram:startup-config" and "more slavenvram:startup-config" both display correct configuration. Clock is OK. The time after "NVRAM config last updated" is NOT the time of last reload, it's about 10 days after the last reload. Any ideas? Thanks.

[Vinit Jain]

one possible reason i could think of is your nvram battery on the Supervisor card on the 6500 is low. Did you get any log message of low battery. Could you please confirm this from your syslogs.

[sasha]

Thanks, but there's no mention of battery in syslogs. Also, there's nothing unusual in nvram log. There is one unusual thing regarding that specific save on June 3rd 10:22 - looks like we issued "copy run start" twice within 30 seconds. But I can't figure out why that would be a problem.

Jun  3 10:21:48 x.y.z.1 4179: Jun  3 10:21:32.663 CEST: %SYS-5-CONFIG_I: Configured from console by admin on vty1 (x.y.z.130)
Jun  3 10:22:06 x.y.z.1 4181: Jun  3 10:21:49.003 CEST: %PFINIT-SP-5-CONFIG_SYNC: Sync'ing the startup configuration to the standby Router.
Jun  3 10:22:40 x.y.z.1 4184: Jun  3 10:22:22.951 CEST: %PFINIT-SP-5-CONFIG_SYNC: Sync'ing the startup configuration to the standby Router. 

Any other ideas? Best regards.