February 13, 20251 yr Hello, I'm trying to set up an unraid system on a passive cooled device. I want to use a sata ssd as parity and a NVMe ssd as Disk1, both 2TB. Currently I use a crucial t700 as nvme. When I start the array and the read check is done, I have problems with overheating with the nvme and it is disabled. According to the manufacturer, it should slow the transfer rate when getting to hot. Have someone recommendations for nvmes in a passive cooled system, or how I can avoid the disabling when getting over a certain threshold? I would be glad for some help.
February 13, 20251 yr Not directly related to your heat problem, but SSDs in the parity array cannot be trimmed. Array is not required in Unraid v7, and since you only have the 2 SSDs probably makes more sense to do a ZFS mirror pool.
February 13, 20251 yr There are aftermarket M.2 NVME dissipators. But whether it's aftermarket or comes with a new part, it will require some airflow to be of some use, especially for a long and intense operation like parity build/check. There are also active cooling for SSD, but thats probably overkill.
February 15, 20251 yr I have had almost zero luck with passive cooled NVMEs. Even with fairly decent sized heatsinks if you have large data transfers it will eventually slow down. I gave up and only use active cooled heatsinks now. I no longer get slow down on large data transfers. Brand of NVME also matters some run hotter then others and will hit slow down faster. They all seem to regulate around 42c. Some just start closer to that 42c value from idle.
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