SSD Tweaks

There were a couple of tweaks I'd use on my Asus EeePC to tweak the SSD speed and extend it's life. Will these same tweaks work on the Raspberry Pi?

fstab: "/ ext4 discard,noatime,nodirtime"

... there's no hard disk controller so should I use 'discard'

IO Scheduler: "cat /sys/block/sdX/queue/scheduler"

... couldn't find which scheduler is being used ... is it even necessary?

Thanks for any suggestions

discard - no idea if it will help
noatime - sure
nodiratime - viewtopic.php?p=132419#p132419 says it's not needed

Regarding the scheduler - again I have no idea if it'll make any difference, but on the RPi you can see the current setting with

Code: Select all

cat /sys/block/mmcblk0/queue/scheduler

Much more info in this thread viewtopic.php?f=29&t=11767 (and the other threads it links to).

A quick google'ing about discard yields: https://patrick-nagel.net/blog/archives/337

with “discard” on, deleting a big bunch of small files is 64 times slower on my SSD. For those ~40 seconds any I/O is really slow

I would leave it off. Besides, I'm not sure if a SD-card qualifies as a full-blown SSD with Trim support.

Cool! Thanks for the feedback. Leaving /etc/fstab in its original form. I just got my Pi yesterday and had a whole 30 minutes to play with it before running off to work. Tinkering/surfing/posting with the little beast now.

IO Scheduler:

cat /sys/block/mmcblk0/queue/scheduler = deadline ... changed it to noop via echo noop > /sys/block/mmcblk0/queue/scheduler ... will see how things go.