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I am thinking about getting a 7b12 and h11ssl. But which 2U cooler should I get? This is for a Supermicro 826 chassis. I see tugm has Tr4 sp3 radiator cooling fan for AMD AMD epyc server Radiator, cooler, | eBay and AMD epyc 2U active SP3 TR4 4 heat pipe CPU radiator Ⅹ 399 H11DSi | eBay

LSI SAS1 has 2TB limitation for SATA drives, but works great with SAS drives.

I highly recommend ZFS over BTRFS, ZFS has momentum and community and has proven it works great for almost two decades. With special metadata devices you will also have the performance advantage.

Hard Drives do need extra care, but bad packaging doesn't mean they are all bad. I think I've bought around 250 hard drives from Ebay the last few years, and only around 25 has been bad.

I have bought lots of hard drives with no protection that has been shipped halfway around the globe without a single error. You worry too much. The worst lot I've bought, has been among the safest packaging. One seller sent me 18 bad useless hard drives of a lot of 20, god I was mad about that...

Happened to me too.

The biggest performance boost is adding special metadata vdevs, it makes a huge difference and is much much better than having l2arc.

dont use urandom directly when you want to test your ssd write a file to for example a ram drive(tmpfs) or nvme drive with urandom, and then write it to the ssd

I just bought myself a new office PC where I a stripe of 4 of these. Good enough performance for me and a few VM's :)

There is no better performance, data integrity with SAS. SATA and hard drive vendors has cached up with SCSI. Data integrity features can be enabled and tuned in firmware, hdparm for SATA, sdparm for SAS. NCQ queue depth is plenty when were talking about spinning drives. There is a reason...

Where/Which Dell System? Are they cheap?

There is only one difference between SATA and SAS today, and that is cable length and stability. I have had many shit SATA cables, but very few issues with SAS cables. With this is mind, because of signal requirements of SAS, they also use slightly more power. I would just go for whatever you...

No I am not familiar with it, it probably doesn't use ZFS snapshots which means you waste a shit ton of resources.

Dedup uses memory bandwidth and io. A lot of RAM and special metadata vdevs will help. Desktop class hardware has only 1/4 of the memory bandwidth that server class hardware has. If you dont use dedup, and a ryzen 5600x is to slow, then something else is bottlenecking hard.

Yeah, that setup is way overkill for a backup server. I backup like 100GB every day (most data come from VM's), and this is running on an old athlon x2 with 8GB ddr2 ECC memory. Just gigabit nic and no special vdev. I even have dedup enabled for the VM's. The reason I am still running this on...

My suggestion with that setup is to play around with Clickhouse. Fantastic OLAP database, excellent documentation and easy to get started with and is REALLY fast! With that setup, I expect you to crunch 50 billion records per second.

There are plenty more, SanDisk CloudSpeed Eco 1.92TB SATA 2.5" Solid State Drive | eBay

That cage is awful. After a while, the sleds will bend/get stuck and break. If you fill it up with 5 drives, you will after a year or two, struggle de-attaching your hard drives.

sudo badblocks -wsv -t random -b 4096 /dev/sda

I have Debian Bookworm and badblocks works fine here. Tested on 16TB hard drives.