USB Data pool problem

TrueNAS General
21

Hello everyone
Today I received the PCIe HBA IT mode card and a 200w micro power supply for the drives. I installed the card and plugged in the 2 disks. Truenas/ZFS recognized them perfectly. The data on the disks has been preserved. Everything seems to work as before. I have set the pool to “mirror” and I assume that the procedure has been launched.
The only problem (which may not be one) is that the procedure has been stuck on 27.17% status “SCANNING” for a long time, is this normal?
Thanks for your help.

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22

Now 27,19% :slightly_smiling_face:

23

Whats the exact type of drives that you are using ? Mirror resilvers should be way faster than what you are seeing…

24

It seems to be better.

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25

Thank you Farout

26

You did have a USB-box, didn’t you. which turned two drives into a raid1. So was there just one disk visible or two? If it was just one, then you created a single striple pool with that one visible disk (secretely beeing an raid1 created by the LC box)?

Now you plugged both disk separately, both a are visible and you turned them into a zfs mirror? Than maybe all the data of drive one is copied to drive two? Hopefully that does not break everything…

27

In USB with the lc-power box there was only one disk visible.
You are right, it copies data from one disk to another.

:disappointed_relieved: :disappointed_relieved:

Finished Resilver.

Everything seems to be working fine.
Thanks to everyone who helped me, I have made progress in understanding good practices.

1 Like
28

Hello everyone,
As recommended above, I installed an LSI 9211-8i 6 Gbps HBA IT mode card and connected my 2 drives in “mirror”.
Everything seems to be working fine.
However, the card’s chip heatsink is very hot.
Is there a way to monitor temperature and other data of the card?
Thank you for your support.

29

No, I don’t think there is.

Yes, that is not uncommon, expecially if there is no airflow over it at all.

You could add a small 40mm fan to the heatsink.

Some cards have a small frame holding down the heatsink, it is easy to cable tie a fan to it.

Another solution is something like this in an adhacent slot:

You could also get just the holder on amazon or aliexpress, and add a spare fan.

1 Like
30

Just to add, an LSI card is designed for a case with significant airflow keeping them cool. A card that overheats will cause data errors - so get some airflow on that quickly

31

The problem is that the LSI HBA card is near the power supply, no space for a fan.

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So I made a hole in the top cover and positioned a fan above the hole.

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Now when I touch the chip heatsink with my fingers it is much less hot, almost cold.
Yes it’s DIY, but for the moment I’m using a recycled DELL PC. I’m in the learning phase, later I will set up a more serious server.

Thanks for the feedback, I will try to improve the ventilation of the case.

1 Like
32

Maybe, you should check, whether your disks are CMR or SMR drives.
ZFS and SMR are not friends, so in future always avoid usig SMR drives in ZFS systems.

33

Yeah, that is pretty tight between the heatsink and the psu, which will probably generate some heat as well.

But well made, if you would drill four small holes for the screws, place the fan inside and the grill outside, it would look like it was designed to be that way all long.

It looks like you could somehow use the parts used to connect the heatsink to the card to attach a fan directly. Might come in handy in a different case situation.

Or, some people just use screws making their own thread, with the caveat that I would be confident with that if the heatsink is just glued to the controller.

34

Not with a SATA port multiplier, which is almost as bad an idea as a USB data connection.