[delamon]

QLC retention reported to be around 1 year in unpowered state. I would assume, that drive does background refresh, though. No idea what effect it has on total drive lifetime. It is still mean that if you use it for cold storage it has to be powered.

[wtallis]

A drive's write endurance rating is derived at least in part from the JEDEC standard data retention requirements: 1 year at 30C for consumer drives, 3 months at 40C for enterprise drives, IIRC. Thus, a drive that has reached the end of its rated write endurance can be expected to have those retention characteristics. A drive that hasn't been subjected to that much wear will have significantly longer retention.

[cm2187]

Why is it mean? Why would you want to use a technology that is unsuitable for cold storage for cold storage? You won't even get the power / IOPS benefit if all it does is an infrequent replication of data and is then switched off.

[delamon]

What kind of usage do you envision for 245TB drive with read speed of 3GB/sec?

[cm2187]

I believe it has read speeds of 13GB/s, not 3 (unless you are referring to an equivalent array of 10 HDD). It will almost certainly be used to store training datasets and model weights. Which I assume are good use cases for fast sequential reads.

[delamon]

Right, I misread the spec.