TRIM(Discard) Debian 10 system with RAID 1 SSD

[Radjin]

I built a system with two identical 1TB SSD’s in a raid 1 using ext4. Recently, reading articles I find that trim(discard) may not be activated. I tried the command “findmnt -O discard” and received nothing. Reading a number of articles, mostly older, I am having trouble understanding if TRIM is supported in Debian 10, RAID 1. If it is supported, I understand that running it intermittently is better than continuously, again most articles on the subject are old. Assuming it is supported, how do I activate it and run it intermittently?


Radjin~

[Head_on_a_Stick]

I understand that running it intermittently is better than continuously

Yes, enabling discard as an fstab option slows down your drive, makes undelete operations more difficult and has been known to cause data loss.

how do I activate it and run it intermittently?

Code: Select all

# apt install util-linux
# systemctl enable --now fstrim.timer

Check with

Code: Select all

systemctl list-timers

[Radjin]

Thanks for that. I had come across that command and found it was already installed, but was hesitant to use it as I could find no references to a RAID 1 setup; well no recent references. Any information on if it’s ok to run on a RAID 1?

[Head_on_a_Stick]

Any information on if it’s ok to run on a RAID 1?

I don't know, ask a search engine.