BPN-SAS-846TQ Backplane and PWDIS

cadamwil

Member
Jan 16, 2014
39
2
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40
Nashville, TN
Hello All,
I found a pretty good deal on a 14TB Ultrastar, but i has PWDIS built in. It looks like PWDIS resets the drive by providing 3.3v on Pin 3 of the SATA Power connector. In looking at the specs for the BPN-SAS-846TQ it's supplied power via the old school molex connector, so unless it has a buck converter to provide 3.3v, I should be good, correct? Has anyone tried these in a Supermicro SC846, or ideally one with the TQ backplane?

Adam
 

i386

Well-Known Member
Mar 18, 2016
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Germany
Yes, the backplane is supplied with power through molex connectors on the backside, but the drive receives power from the SFF-8482 connector on the front side of the backplane.
 

cadamwil

Member
Jan 16, 2014
39
2
8
40
Nashville, TN
Yes, the backplane is supplied with power through molex connectors on the backside, but the drive receives power from the SFF-8482 connector on the front side of the backplane.
Right, I am aware of that, otherwise the drive wouldn't power on. My question is, is the backplane making and providing 3.3V on pin 3. If not, I can use drives with PWDIS without issue.
 

itronin

Well-Known Member
Nov 24, 2018
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Denver, Colorado
Right, I am aware of that, otherwise the drive wouldn't power on. My question is, is the backplane making and providing 3.3V on pin 3. If not, I can use drives with PWDIS without issue.
Or you could just use some kapton tape on the the drive's 3.3v pin and use it...