While rebuilding my TM NAS I installed UnRaid 7.0 on a USB device (32GB Sandisk). First time went ok, but now that its been running it sometimes pops up saying the flash is corrupt. And indeed from the shell i cannot get to the /boot directory

 

Quote

root@UNNAS:~# fsck /dev/sda1
fsck from util-linux 2.40.2
e2fsck 1.47.1 (20-May-2024)
/dev/sda1 is mounted.

WARNING!!!  The filesystem is mounted.   If you continue you ***WILL***
cause ***SEVERE*** filesystem damage.

Do you really want to continue<n>? yes
/sbin/e2fsck: No such file or directory while trying to open /dev/sda1
Possibly non-existent device?
root@UNNAS:~# 
root@UNNAS:~# mount | grep /boot
/dev/sda1 on /boot type vfat (rw,noatime,nodiratime,fmask=0177,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,flush,errors=remount-ro)
/boot/bzfirmware on /usr type squashfs (ro,relatime,errors=continue)
/boot/bzmodules on /lib type squashfs (ro,relatime,errors=continue)
root@UNNAS:~# cd /boot
root@UNNAS:/boot# ls
root@UNNAS:/boot# 

 

But if i take the USB out and look at the contents on my PC it just works. Put it back in and no problem... is this a USB problem here ? Sure looks like it. 

unnas-diagnostics-20250110-1744.zip

Try booting from a USB2 port, much more reliable.