Hi everyone.
I've found a tool that can flash the PIC16 FCB :
Dell FCB Firmware, 1.02 | Dell US
I've somehow stumbled upon it by googling PEC6100FCB102.
Unfortunately it's an older version than the one I have (1.04) or better put, I've had - now on 1.02.
I've managed to brick the FCB (this thing is F...ing loud in "dead fcb" mode) writing the 1.20 pic18 firmware but, after some tinkering with the chassis (removing the sleds. ps, fans - most of the stuff you can easily get to) and some unsuccessful attempts to flash the fcb via ipmi (btw, the hex code in the readme points to a BMC109T1.ROM file), it worked somehow (from dos - sled #4).
I didn't manage to figure out if there are some cmd line options so if anyone gets to try it, please post results. The most useful thing right now would be a pic16 fw image.
Here's a image from ipmi:
ipmitool> sensor
FCB FAN1 | 4400.000 | RPM | ok | na | 1500.000 | na | 25500.000 | 25500.000 | 25500.000
FCB FAN2 | 4400.000 | RPM | ok | na | 1500.000 | na | 25500.000 | 25500.000 | 25500.000
FCB FAN3 | 4400.000 | RPM | ok | na | 1500.000 | na | 25500.000 | 25500.000 | 25500.000
FCB FAN4 | 4400.000 | RPM | ok | na | 1500.000 | na | 25500.000 | 25500.000 | 25500.000
PEF Action | 0x0 | discrete | 0x0080| na | na | na | na | na | na
WatchDog2 | 0x0 | discrete | 0x0080| na | na | na | na | na | na
AC Pwr On | 0x0 | discrete | 0x0080| na | na | na | na | na | na
ACPI Pwr State | 0x0 | discrete | 0x0088| na | na | na | na | na | na
FCB Ambient1 | 24.000 | degrees C | ok | na | na | na | na | 50.000 | 255.000
FCB Ambient2 | na | | na | na | na | na | na | 50.000 | 255.000
CPU1Status | 0x0 | discrete | 0x0080| na | na | na | na | na | na
CPU2Status | 0x0 | discrete | 0x0080| na | na | na | na | na | na
PS 12V | 12.090 | Volts | ok | 10.602 | 10.850 | 11.160 | 12.834 | 13.144 | 13.392
PS 5V | 5.044 | Volts | ok | 4.394 | 4.524 | 4.654 | 5.330 | 5.486 | 5.590
MLB TEMP 2 | 52.000 | degrees C | ok | na | na | na | 85.000 | 87.000 | 90.000
MLB TEMP 3 | 47.000 | degrees C | ok | na | na | na | 85.000 | 87.000 | 90.000
Processor 1 Temp | 58.000 | degrees C | ok | na | na | na | 81.000 | 85.000 | 90.000
MLB TEMP 1 | 52.000 | degrees C | ok | na | na | na | 85.000 | 87.000 | 90.000
Processor 2 Temp | 60.000 | degrees C | ok | na | na | na | 81.000 | 85.000 | 90.000
STBY 3.3V | 3.354 | Volts | ok | 2.907 | 2.976 | 3.079 | 3.526 | 3.629 | 3.681
PS Current | 44.000 | Amps | ok | na | na | na | 255.000 | 255.000 | 255.000
SEL Fullness | 0x0 | discrete | 0x0080| na | na | na | na | na | na
PCI BUS | 0x0 | discrete | 0x0080| na | na | na | na | na | na
Memory | 0x0 | discrete | 0x0080| na | na | na | na | na | na
VCORE 1 | 1.038 | Volts | ok | na | na | na | 2.117 | 2.117 | 2.117
VCORE 2 | 0.940 | Volts | ok | na | na | na | 2.958 | 2.958 | 2.958
NM Capability | 0x3 | discrete | 0x0000| na | na | na | na | na | na
Security | 0x0 | discrete | 0x0080| na | na | na | na | na | na
PSU 1 AC Status | na | discrete | na | na | na | na | na | na | na
PSU 2 AC Status | na | discrete | na | na | na | na | na | na | na
PSU 1 Present | na | discrete | na | na | na | na | na | na | na
PSU 2 Present | na | discrete | na | na | na | na | na | na | na
PSU 2 POUT | na | | na | na | na | na | na | na | na
PSU 1 POUT | na | | na | na | na | na | na | na | na
That's with 3 sleds on, idle.
Funny thing, with the v1.04 that I've had, the thing was silent with one sled on, 2 would go to 6000+ RPM.
Other good note, with one sled on, idle, the fans would go to 3600 rpm only.