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FSTrim/Discard Recommended?
Posted: Fri Jun 23, 2017 4:38 pm
by kbocek
I have a Raspian based distro (FreePBX) and am wondering if running fstrim and mounting the filesystem with discard is recommended? I see the SSD documentation:
https://wiki.debian.org/SSDOptimization
But I am unsure how this applies to Micro-SD cards.
Thanks.
Re: FSTrim/Discard Recommended?
Posted: Fri Jun 23, 2017 5:47 pm
by kbocek
A bit more research on SSDs. So basically you do *not* mount with discard and instead occasionally run fstrim via the timer:
Code: Select all
/usr/share/doc/util-linux/examples/fstrim.service
/usr/share/doc/util-linux/examples/fstrim.timer
Re: FSTrim/Discard Recommended?
Posted: Fri Jun 23, 2017 6:03 pm
by runboy93
There is no TRIM for SD cards.
Re: FSTrim/Discard Recommended?
Posted: Fri Jun 23, 2017 6:09 pm
by kbocek
A posting says the the lsblk -D command tells you if trim is supported:
Code: Select all
$ lsblk -D
NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
mmcblk0 0 4M 976M 1
|-mmcblk0p2 3145728 4M 976M 1
`-mmcblk0p1 3145728 4M 976M 1
This seems to say it *is* supported.