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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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.
still ssd freezes on bigger file reads

https://www.raspberrypi.org/forums/viewtopic.php?t=245931
well, it seems there are adapters out there that dont work well with USB3
UAS on Raspberry Pi4. what a pity! :( The link above has a fix. but the
fix will slow down the SSD. No UAS anymore.

I'm still checking if this was what caused the freezes, but i'm quite
sure it was.

This is the adapter (or the chip), in case you want to buy one for
yourself. Choose a different one for you Pi4 ;)

ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp.
JMS567 SATA 6Gb/s bridge

Someone in here has a tip wich msata usb3 adapter works well with a
Raspberry Pi4 and UAS enabled?

Mindsurfer



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