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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Mindsurfer wrote to Mindsurfer <=-

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 recently rebuilt my server using two Pi4s (1 active, 1 cold stand by) and USB-SATA adaptors.

This one: https://www.amazon.com/gp/product/B07S9CKV7X/ref=ppx_yo_dt_b_asin_title_o02_s00 ?
ie=UTF8&psc=1

worked fine for me.

I actually have 4 hard drives connected to a USB3 hub for this setup. https://photos.app.goo.gl/AzKWFQv3xTCrPVbC9

Note that I used a "RAID -1" (i.e. two of the drives are active, the other 2 are rsync backups of the active drives).


... Last night sex was so good the neighbors lit cigarettes.
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I recently rebuilt my server using two Pi4s (1 active, 1 cold stand
by) and USB-SATA adaptors. https://www.amazon.com/gp/product/B07S9CKV7X/ref=ppx_yo_dt_b_asin_t itle_o02_s00 ?
worked fine for me.

It seems there are some working USB3 to Sata Adapters with a chipset that
works well everywhere. Unfortunatly i wanted to do it with a Msata ssd.
So i needed one of those msata to usb3 enclosures. I mean, even without
UAS activated, it is still fast enough. But i would apreciate the extra
speed of usb3 with uas you know.

I actually have 4 hard drives connected to a USB3 hub for this
setup. https://photos.app.goo.gl/AzKWFQv3xTCrPVbC9
Note that I used a "RAID -1" (i.e. two of the drives are active,
the other 2 are rsync backups of the active drives).

Wow, what a beauty :) nice one! i have another hdd connected to do some automated rsync backup of my msata ssd. But i dont have 4 drives in a
case like you =) well done!

Mindsurfer

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