Thanks to you I had extra motives to get the switch up and running. I read through Brocade's pinout and made an attempt to map out the RJ45 and DB9 which indeed worked, so now I have everything up and running. But yes, the fan is still sounding though.
>show chassis
The stack unit 1 chassis info:
Power supply 1 (NA - AC - Regular) present, status ok
Power supply 2 not present
Fan ok, speed (auto): [[1]]<->2
Fan speed switching temperature thresholds:
1 -> 2 @ 69 deg-C
1 <- 2 @ 64 deg-C
Sensor B Temperature Readings:
Current temperature : 40.5 deg-C
Sensor A Temperature Readings:
Current temperature : 50.0 deg-C
Warning level.......: 66.0 deg-C
Shutdown level......: 76.0 deg-C
>show chassis
The stack unit 1 chassis info:
Power supply 1 (NA - AC - Regular) present, status ok
Power supply 2 not present
Fan ok, speed (auto): [[1]]<->2
Fan speed switching temperature thresholds:
1 -> 2 @ 69 deg-C
1 <- 2 @ 64 deg-C
Sensor B Temperature Readings:
Current temperature : 40.5 deg-C
Sensor A Temperature Readings:
Current temperature : 50.0 deg-C
Warning level.......: 66.0 deg-C
Shutdown level......: 76.0 deg-C