Hi there, I've been building out a shallow 24 bay DAS for my rack.
It's based on a Supermicro BPN-SAS3-846EL1 from a CSE-846.
I have seen quite a few builds of others using non standard PSUs in a CSE-846, without issues (link) so I didn't really think anything of it when I removed the backplane, built out an enclosure and attempted to power it with standard PSUs.
I believe I am having an issue with 5v power delivery; but it could be 12v.
So far I have tried the following power supply combinations:
I currently have 20 drives in use, so it makes sense that the power draw is pretty high, but I have not found any info on the recommended psu specs for this backplane (Manual here: https://www.supermicro.com/manuals/other/BPN-SAS3-846EL1-N8.pdf)
The backplane seems to start fine in all 4 configurations, the leds light as expected/pass 5v and 12v power checks on start.
Can anyone with this backplane point me to the PSU they are using? How many drives they are running?
It's based on a Supermicro BPN-SAS3-846EL1 from a CSE-846.
I have seen quite a few builds of others using non standard PSUs in a CSE-846, without issues (link) so I didn't really think anything of it when I removed the backplane, built out an enclosure and attempted to power it with standard PSUs.
I believe I am having an issue with 5v power delivery; but it could be 12v.
So far I have tried the following power supply combinations:
PSU | wattage on 5v rail | Amps on 12v rail | Amps on 5v rail | Behavior |
2x Supermicro PWS-920P-SQ | 500w | ? | 100a | Works as expected/all drives behave |
FSP Hydro G PRO 850W | 120w | 72A | 20A | some drives are not recognized in unraid, read/write errors |
FSP Group FSP550-50SGGBA | 120w | 45A | 22A | * |
FSP Hydro G PRO 850W & FSP550-50SGGBA | 240w? | 107A? | 42A? | * |
---|
I currently have 20 drives in use, so it makes sense that the power draw is pretty high, but I have not found any info on the recommended psu specs for this backplane (Manual here: https://www.supermicro.com/manuals/other/BPN-SAS3-846EL1-N8.pdf)
The backplane seems to start fine in all 4 configurations, the leds light as expected/pass 5v and 12v power checks on start.
Can anyone with this backplane point me to the PSU they are using? How many drives they are running?