PLS help, ZFS pool status “DEGRADED”

[cemo4ez]

Hello community,

I hope my message finds everyone well. I have a question about my TrueNAS build. I am new to the whole topic of TrueNAS and ZFS. I might have shot myself in the foot with the build I put together, maybe, possibly?!

My ZFS pool status shows as “DEGRADED”.

Two out of five drives show a high checksum, and 1 error while scrubbing the pool.

The MOB I used has only 4 SATA connections. I bought a SATA PCIe Adapter 6 Ports SATA III to PCI Express 3.0 X1 Expansion Card. From what I understood, the throughput of PCI Express 3.0 X1 (0.985 GB/s) should be enough for a few HDD’s. Yet two of my freshly purchased NAS HDD’s show checksum errors (all of my NAS HDD’s are new).

Can it be due the cheaper Expansion Card I use?
Is it the small amount of RAM?
Is it even possible that two new drives have faults?


Here is some more info on my TrueNAS build:

TrueNAS version 12.0-U7
AMD Ryzen 3 3200G

8GB RAM
5 x 4TB NAS HDD’s - RAIDZ1
1 x 1TB SSD cache
1 x 120GB SSD TrueNAS install

Jails running: Adguard, Heimdall, Plex, Resilio


Thank you in advance for any input

 

[jgreco]

I bought a SATA PCIe Adapter 6 Ports SATA III to PCI Express 3.0 X1 Expansion Card

Good lord,why?

From what I understood, the throughput of PCI Express 3.0 X1 (0.985 GB/s) should be enough for a few HDD’s.

Yes. but so what?

Can it be due the cheaper Expansion Card I use?

Highly likely.

See

Multiply your problems with SATA Port Multipliers and cheap SATA controllers

In the last year or two, we've had a resurgence of users asking about SATA Port Multipliers and cheap SATA controllers. Please, do NOT use port multipliers, and use cheap SATA controllers only after extensive research. SATA controllers and SATA...

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