Re: Does mfi write-back cache work for anyone?

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Tue, Jan 08, 2013 at 09:51:08AM +0100, Manuel Bouyer wrote:
> On Mon, Jan 07, 2013 at 11:06:21PM -0500, Thor Lancelot Simon wrote:
> > 
> > Does anyone actually have a PERC (or any controller using the mfi driver)
> > card with BBU that is actually successfully using the write-back cache
> > under NetBSD?
> 
> I also have:
> mfi0 at pci8 dev 14 function 0: Dell PERC 5/i integrated
> mfi0: interrupting at ioapic1 pin 14
> mfi0: PERC 5/i Integrated version 5.0.1-0030
> mfi0: logical drives 2, 256MB RAM, BBU type BBU, status bad
> scsibus0 at mfi0: 64 targets, 8 luns per target
> 
> this one reports 'status bad' at boot time but switches to good later:
> swing:/home/bouyer>envstat -d mfi0
>              Current  CritMax  CritMin  CritCap     Unit
> mfi0 BBU:         ON
>   mfi0:0:     online
>   mfi0:1:     online

I think something still *must* be wrong with the driver -- here is what
I see, including output from the Linux MegaCLI utility, which is pretty
sure the battery is just fine:

mfi0 at pci8 dev 14 function 0: Dell PERC 5/i integrated
mfi0: interrupting at ioapic1 pin 14
mfi0: PERC 5/i Integrated version 5.2.2-0072
mfi0: logical drives 1, 256MB RAM, BBU type BBU, status bad
scsibus0 at mfi0: 64 targets, 8 luns per target

            Current  CritMax  WarnMax  WarnMin  CritMin  Unit
mfi0 BBU:     FALSE
  mfi0:0:    online

# ./MegaCli64 -AdpBbuCmd -GetBbuStatus -a0
                                     
OSSpecificInitialize: Failed to load libsysfs.so.2.0.2 Please ensure that
libsfs is present in the system.
The dependent library libsysfs.so.2.0.1 not available. Please contact LSI for
distribution of the package
BBU status for Adapter: 0

BatteryType: BBU
Voltage: 4084 mV
Current: 46 mA
Temperature: 24 C
Battery State     : Operational

BBU Firmware Status:

  Charging Status              : Charging
  Voltage                                 : OK
  Temperature                             : OK
  Learn Cycle Requested                   : No
  Learn Cycle Active                      : No
  Learn Cycle Status                      : OK
  Learn Cycle Timeout                     : No
  I2c Errors Detected                     : No
  Battery Pack Missing                    : No
  Battery Replacement required            : No
  Remaining Capacity Low                  : No
  Periodic Learn Required                 : No
  Transparent Learn                       : No
  No space to cache offload               : No
  Pack is about to fail & should be replaced : No
  Cache Offload premium feature required  : No
  Module microcode update required        : No


GasGuageStatus:
  Fully Discharged        : No
  Fully Charged           : Yes
  Discharging             : No
  Initialized             : Yes
  Remaining Time Alarm    : No
  Discharge Terminated    : No
  Over Temperature        : No
  Charging Terminated     : No
  Over Charged            : No
Relative State of Charge: 100 %
Charger Status: In Progress
Remaining Capacity: 323 mAh
Full Charge Capacity: 323 mAh
isSOHGood: No

Exit Code: 0x00