Could this be it?
> http://yo61.com/dell-drac-bbu-auto-learn-tests-kill-disk-performance.html On Jul 29, 2010, at 9:42 AM, Nicolas Chipaux wrote: > Hello, > > We notice that the Perc card one of our filer has switched to WriteThrough > policy without any particular reason. We try to switch back to WriteBack to > use > the BBU, but the controler will not allow us to do that. We had to force the > config to CachedBadBBU to get the policy back to WriteBack but this situation > is highly unstable. In the BBU information available with MegaCLI nothing > seems > to indicate any problem on the battery. > > Any idea ? > > > So : > > Default Cache Policy: WriteBack, ReadAheadNone, Cached, No Write Cache if Bad > BBU > Current Cache Policy: WriteThrough, ReadAheadNone, Cached, No Write Cache if > Bad BBU > > => MegaCli -LDSetProp WB -LAll -a0 > Set Write Policy to WriteBack on Adapter 0, VD 0 (target id: 0) success > Exit Code: 0x00 > > no success. > > => MegaCli -LDSetProp CachedBadBBU -LAll -a0 > Then the policy is switch to WriteBack ignoring the BBU status > > In the BBU status from MegaCLI, where is the battery flagged as 'bad' ? > > If we start a short learn cycle on the battery unit, the current policy first > switches a few minutes to "WriteBack" (?!) but when the power level is going > under the default threshold, the policy switch back to WriteThrough which is a > normal behavior. But when the power level is back up wll above the threshold, > the policy is still WriteThrough > > > > About the battery unit : > > => MegaCli -AdpBbuCmd -a0 > BBU status for Adapter: 0 > > BatteryType: BBU > Voltage: 4040 mV > Current: 0 mA > Temperature: 32 C > Firmware Status: 00000000 > > Battery state: > > GasGuageStatus: > Fully Discharged : No > Fully Charged : Yes > Discharging : Yes > Initialized : Yes > Remaining Time Alarm : No > Remaining Capacity Alarm: No > Discharge Terminated : No > Over Temperature : No > Charging Terminated : Yes > Over Charged : No > > Relative State of Charge: 98 % > Charger Status: Complete > Remaining Capacity: 835 mAh > Full Charge Capacity: 854 mAh > isSOHGood: Yes > > BBU Capacity Info for Adapter: 0 > > Relative State of Charge: 98 % > Absolute State of charge: 49 % > Remaining Capacity: 835 mAh > Full Charge Capacity: 854 mAh > Run time to empty: 65535 Min > Average time to empty: 65535 Min > Average Time to full: 65535 Min > Cycle Count: 11 > Max Error: 0 % > Remaining Capacity Alarm: 170 mAh > Remaining Time Alarm: 10 Min > > > BBU Design Info for Adapter: 0 > > Date of Manufacture: 10/13, 2008 > Design Capacity: 1700 mAh > Design Voltage: 3700 mV > Specification Info: 33 > Serial Number: 368 > Pack Stat Configuration: 0x0008 > Manufacture Name: SANYO > Device Name: DLKR174 > Device Chemistry: LION > Battery FRU: N/A > > > BBU Properties for Adapter: 0 > > Auto Learn Period: 7776000 Sec > Next Learn time: 341873114 Sec > Learn Delay Interval:0 Hours > Auto-Learn Mode: Enabled > > > > Information about the Perc6 : > > Versions > ================ > Product Name : PERC 6/E Adapter > Serial No : 1122334455667788 > FW Package Build: 6.1.1-0047 > > Mfg. Data > ================ > Mfg. Date : 06/24/08 > Rework Date : 06/24/08 > Revision No : > Battery FRU : N/A > > Image Versions In Flash: > ================ > FW Version : 1.21.02-0528 > BIOS Version : 2.01.00 > WebBIOS Version : 1.1-46-e_15-Rel > Ctrl-R Version : 1.02-014B > Preboot CLI Version: 01.00-020:#%00004 > Boot Block Version : 1.00.00.01-0011 > > > Regards. > > -- > Nicolas Chipaux > GANDI - http://www.gandi.net > > _______________________________________________ > Linux-PowerEdge mailing list > [email protected] > https://lists.us.dell.com/mailman/listinfo/linux-poweredge > Please read the FAQ at http://lists.us.dell.com/faq _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
