Unable To Boot FreeNAS -- IBM M1015 Controller Issue?

[melloa]

Can also be issues with how the power is distributed too

On a PSU perspective the cables should be in parallel or another methodology to ensure load balance. Long time since I looked at a PSU diagram, but the basics should be that.

 

[SweetAndLow]

My vote is on the psu.

Sent from my Nexus 5X using Tapatalk

 

[melloa]

My vote is on the psu.

That makes three of us.

 

[Stux]

On a PSU perspective the cables should be in parallel or another methodology to ensure load balance. Long time since I looked at a PSU diagram, but the basics should be that.

The load needs to be balanced amongst the 12V rails, the drives need to be balanced amongst the runs, and Sata power can power no more than 2 drives (iirc) per connector. (4.5A@12V)

Molex peripheral connectors support 11A@12V and can power up to 4-5 drives per connector.

Of course, this doesn't mean you can max each connector on each run.

Better to connect drives to connectors closer to the psu than farther.

 

[Ericloewe]

Sata power can power no more than 2 drives (iirc) per connector. (4.5A@12V)

Yeah, even that is pushing it with a nearly 3A draw per drive. Still doable, but definitely a hard maximum limit.

 

[Stux]

Yeah, even that is pushing it with a nearly 3A draw per drive. Still doable, but definitely a hard maximum limit.

It's really the 12V spinup current that is the limit, you also have an additional 4.5A of 5v on a Sata power connector, which is plenty

Most HDs are specced for 2-2.5a of 12V spinup current.

But yes, this is a serious limit to consider, it's not theoretical ;)

Yes, I know about @Bidule0hm's research ;)