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  1. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    Chenbro Rail part kit number is actually 84H024010-012. You can work with a Chenbro reseller and get them. I got a quote for $249.00.
  2. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    If anyone is still using this setup here are the part numbers for the: Drive Caddies: 84H343310-002 Rail Kit: 93786|CA-433RAIL --- RAIL KIT RM43348E3-R1100NR Best of luck.
  3. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    I think it was earlier in the thread, otherwise I just plugged it in and looked at what happened. It appears there is literally no use in plugging in the fans using the 5 pin cable. It seems to do absolutely nothing other than allow you to read the speed of the fan not set it. It does not give...
  4. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    So the fans in the midplane are completely powered off the SAS3 backplanes. The 5-pin "PWM-like" headers are just putting out a tach reading. only 1 of them is in the proper alignment to be read, the second signal should be off the 4 pin headers and not in contact with a male pin on the...
  5. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    Final Thoughts: Custom cables worked great, as did the Epyc motherboard in the chassis. Ended up needing to clip and modify some PWM fan extension cables in order to get the in-chassis fans all the way back to where the PWM headers were in the case. 2U cooler comes tomorrow, and should be a...
  6. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    Additional info for anyone building with this. The midplane fans respond only to HARD DRIVE temps, not to the motherboard. The proper alignment with the pins for the fan headers is to have the 2 blank pins aligned with the side of the PWM headers with the clip, and the final tach wire not in...
  7. M

    48 Drive 4U Chassis: IBM Slicestor 3448 aka Chenbro RM43348

    Update for whomever continues using these for builds in case you're bad at the wiring side like me courtesy of the post author. The front panel connector is labeled "MBI Side Band Signal Connector" on page 26 of the Chenbro 43348 User Manual, take that wiring out and replace it with custom...