Subj : USB3 SSD temp. Freeze
To   : All
From : Mindsurfer
Date : Wed Sep 02 2020 23:29:06

i have a raspberry pi4 /2gb and have added a msata to usb3 adapter
holding a 256gb ssd. it is connected via powered usb3 hub to the usb3
port of the raspberry pi4.

But every now and then during data transfers (reading bigger message
bases directories for example) the ssd freezes. the led on the usb3 hub
is blinking and it stays that way for lets say 30seconds.

Aynone had this experience before? Ideas what to check? ..what to fix?
The msata drive is brand new. the adapter too. ssd is formated as ext4
and the adapter supports UASP.

i checked smartmontools
i used fstrim
i have set dirty_bytes and dirty_background_bytes to higher values (made
it worse)

still ssd freezes on bigger file reads

Mindsurfer

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