SOLVED Constant zpool degrading

[Z300M]

Not in the least. It means that one or a handful of test units that were evaluated squeaked over some arbitrary bar.

And it does not take into account the possibility that a less-than-reputable manufacturer will send a few samples for testing then manufacture products with that same model number but with inferior or omitted components.

 

[Green750one]

Sounds like Power issue.


Sata connectors should not be split more than once.

3 itty bitty pins for each voltage means a total of 4.5A for 12V. Normal drives needs about 2A for spinup. This means that two drives hanging off one connector will draw circa 4A. 3 would exceed the rating of the connector.

Then you need to worry about the current of the main wire loom, and what rail it's connected to.

I'd suggest doing yourself a favor and getting a good single rail modular psu.

EVGA, corsair RMx, Seasonic etc.

I'm pretty much convinced it's not the psu itself. It may not be a Seasonic but it is well made with quality components (having opened it up & investigated what's inside).
I took on board your advice and now have 6 power cables each with 2 drives. All seems ok at the moment and has survived both long smart tests and scrub.
If I get another drop out I'll get a Seasonic.

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[Ericloewe]

I'm pretty much convinced it's not the psu itself. It may not be a Seasonic but it is well made with quality components (having opened it up & investigated what's inside).
I took on board your advice and now have 6 power cables each with 2 drives. All seems ok at the moment and has survived both long smart tests and scrub.
If I get another drop out I'll get a Seasonic.

Sent from my D6503 using Tapatalk

All models have bad samples. Just the other day, I had a Seasonic G-550 wreak havoc on my carefully-planned server transition. Fortunately, everything else seems to have survived.

Never, ever assume the PSU is working, always test it in a different system or try a different PSU.

 

[Stux]

All models have bad samples.

...

Never, ever assume the PSU is working, always test it in a different system or try a different PSU.

Wish I had followed this advise a few times in the past :)

 

[Green750one]

Quick update. Since I changed the cable layout to my drives everything is looking good. I was lucky to get half a day before a drive dropped before.
Not counting chickens just yet, but properly balanced power distribution seems to be the solution.

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[CraigD]

I would avoid touching cables just in case

You must be relieved

 

[Green750one]

I would avoid touching cables just in case

You must be relieved

I'm not sure I completely trust it just yet so I'll see how it goes over the next few scrub cycles before I put the case screws back on!

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[Green750one]

7 1/2 days and all drives still connected! Problem solved - don't overload power cables!

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