Search notes:

/mnt/wslg/distro/

The same file system (for example /dev/sdc) that is mounted to / is also mounted (read-only) to /mnt/wslg/distro. 
$ sudo mount | grep '/mnt/wslg/distro'
/dev/sdc on /mnt/wslg/distro type ext4 (ro,relatime,discard,errors=remount-ro,data=ordered

See also

/mnt/wslg

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1759390958, '216.73.216.42', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/mnt/wslg/distro(40): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78