undefined | Better HN

0 pointssm_10241y ago0 comments

They do make 10 TB+ SSDs:

https://www.allhdd.com/kioxia-kcmyxrug15t3-15.36tb-ssd

Infact, Kioxia's enterprise line goes up to 30 TB/drive.

0 comments

4 comments · 1 top-level

tw041y ago· 3 in thread

You linked a 15.3TB drive which doesn't dispute his point. 10TB has never been a manufactured SSD size that I'm aware of. In the enterprise we've got approximately 960GB, 1.92TB, 3.84TB, 7.6TB, 15.3TB, 32TB.

10 is skipped entirely, unless you can provide an example of any reputable manufacturer producing one.

Consumer drives don't follow that exactly, but consumer SSDs also don't hit 10TB+.

wtallis1y ago

Exactly. I didn't say 10TB was too big, I said it was an odd size. There's no easy way to get close to 10TB when using components that are sized by powers of two, plus or minus varying amounts of overprovisioning depending on market segment, and GB vs GiB differences. ~8TB SSDs are common in consumer and enterprise markets. 16TB drives that expose 15.36TB usable space are common in enterprise, and 12.8TB usable space from ~16TB raw flash isn't unheard of. 10TB usable space isn't theoretically impossible, but it simply wouldn't make sense.

simoncion1y ago

> There's no easy way to get close to 10TB when using components that are sized by powers of two...

I expect you can get any usable capacity you like by reserving some subset of the flash for onboard spare/scratch space. I think I remember long ago Anandtech doing some benchmarking the changing performance of some drives as they adjusted the size of this "housekeeping" section of the drive. No clue if it's adjustable on every drive, but it sure was on the ones they were testing.

1 more reply

userbinator1y ago

There's no easy way to get close to 10TB when using components that are sized by powers of two

5 x 2TB? 16Tbit (2TB) NAND flash is available these days.

This old Intel SSD is 10 x 16GB: https://www.storagereview.com/wp-content/uploads/2010/04/int...

SSDs aren't sized in powers of 2 anymore. Even the flash itself isn't due to things like spare area (and TLC flash is internally actually a multiple of 3 times a power of 2 size.)

j / k navigate · click thread line to collapse