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Strange problem with PSU and Hot Swap Bay


p1lot

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Hello,

 

I have 3 Nocro SS-500 in my case (well, the xcase.co.uk-version), the first one on top of the case holds 5 disks and works perfectly.

 

Now I started to fill my second one with a single disk and it didnt work, so I assumed the HDD is broken (sometimes not recognized by the Supermicro card, sometimes detected but precleared stopped at 3% etc.)

Then I tried 2 other disks and it happened the same.

 

My assumption is now, that this is a PSU problem. I own the Cooler Master Silent Pro M500.

 

Does anybody know what is going on here? As the PSU is modular, I only used a SINGLE cable with 3 Molex connection to connect all 3 Norcos.

 

I also tried connecting both molex connection on the Norco, same result. This is really desperate as I tried a million scenarios to fix this, and the outcome is always the same.

 

 

Thanks in advance,

p1lot

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Hello,

 

I have 3 Nocro SS-500 in my case (well, the xcase.co.uk-version), the first one on top of the case holds 5 disks and works perfectly.

 

Now I started to fill my second one with a single disk and it didnt work, so I assumed the HDD is broken (sometimes not recognized by the Supermicro card, sometimes detected but precleared stopped at 3% etc.)

Then I tried 2 other disks and it happened the same.

 

My assumption is now, that this is a PSU problem. I own the Cooler Master Silent Pro M500.

 

Does anybody know what is going on here? As the PSU is modular, I only used a SINGLE cable with 3 Molex connection to connect all 3 Norcos.

 

I also tried connecting both molex connection on the Norco, same result. This is really desperate as I tried a million scenarios to fix this, and the outcome is always the same.

 

 

Thanks in advance,

p1lot

 

It could be a bad backplane on the norco/xcase 5-in-3 module.  That would be where I would start actually.

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The drives work if plugged in on my workstation in an eSATA-case. But what about the PSU? The Coolermaster has very thin cables, unlike the Corsair that is recommended. Could it be that the voltage drop is too high?

 

Also, the first 2 slots work, so I think the Norco is fine, I just think that there are too many HDDs connected to the PSU. Possible?

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The drives work if plugged in on my workstation in an eSATA-case. But what about the PSU? The Coolermaster has very thin cables, unlike the Corsair that is recommended. Could it be that the voltage drop is too high?

It might be but I doubt it.

 

Also, the first 2 slots work, so I think the Norco is fine, I just think that there are too many HDDs connected to the PSU. Possible?

No, that makes me think the norco is the problem.  Some work and some don't.  Each slot in the norco is independent.  Some can work and others might now.  You Coolermaster is single rail and has 34A available.  You should be fine to run 15 green drives on that without to much trouble.

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OK, played around with the server some more.

 

The Norcos are all fine (I tested all slots), but if I have more than 7 HDDs in the server, I experience problems.

That means if I add the 8th drive on the Supermicro card, it has sometimes problems detecting it on boot. If it does, it hangs during the preclear very early. -> This is definitely caused by voltage drop right?

 

Same happens on the onboard SATA ports, it takes forever for the Mainboard to detect the 8th drive. Most of the time, the HDD gets detected as "Tape drive". -> Voltage drop?

 

How can I make the PSU not suck?

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