On Sunday, 23 March 2025 12:01:55 Greenwich Mean Time Peter Humphrey wrote: > On Wednesday, 5 March 2025 19:54:19 Greenwich Mean Time Frank Steinmetzger > > wrote: > > Am Wed, Mar 05, 2025 at 03:53:51PM +0000 schrieb Peter Humphrey: > > > Greetings, > > > > > > After reading the recent conversation on m.2 SSDs in a USB-3 enclosure, > > > I > > > decided to give it a try. I bought a 4TB Samsung 990 PRO NVMe M.2 SSD > > > and > > > a > > > Ugreen NVMe USB-3 enclosure. I'm pleased with the performance, but when > > > I > > > tried running fstrim on it I got a "not supported" error. > > > > To get confirmation, try to find out what controller chip is used in the > > enclosure. I looked at a product search for “Ugreen M.2 USB” and just on > > the first page found three different models with three different > > controller chips, from Asmedia, JMicron and Realtek. Then you can check > > the data sheet whether it supports the necessary functions. > > Thank you Frank. > > I revisited this today and found that the enclosure I bought does not > support TRIM, but another one, barely distinguishable, does. I'll return > the one I have and replace it with the other.
Hah! Not only does the new one still not support discard, but it can't handle 4TB drives. Back to the drawing board... -- Regards, Peter.
