Mount -t reiser4 -o txmod=hybrid,noatime,onerror=remount-ro /dev/sdaY reiser4 (the Reiser4 partition) The default is txmod=hybrid which heuristically alternates between the "wa" (write-anywhere) and "journal" models for optimized performance on rotating disks while trying to avoid excess fragmentation at the same time. Then, just copy everything over (as root) like so: cd /mntĭepending on what transaction model one wish to use which are optimized for different types of storage media, the mount option txmod=wa (for SSDs), txmod=journal (for HDDs) must be defined when mounting the partitions through the -o switch. You may either do this from Arch Linux, or to make it easier (so that you do not have to use makedev later), just boot up with the Gparted LiveCD and mount both your new Reiser4 partition and your current root partition. Once the partition is formatted, copy you current system to the new partition and create the system directories. Mkfs.reiser4 -d -o create=reg40,node=node41 /dev/nvme0n1pX Copy system Mkfs.reiser4 -o create=reg40,node=node41 /dev/sdX Mkfs.reiser4 -d -o create=ccreg40,compress=Zstd1 /dev/nvme0n1Xįor drives with controllers already having hardware compression (like SandForce ones), it may be better to to disable the compression plugin. The -d switch can be applied as shown below: Since Reiser4 also has options specifically for SSD users as well, it is recommended to discard the partition upon creation of the filesystem, Mkfs.reiser4 -o create=ccreg40 /dev/sda X It is recommended and also the default to use the Cryptcompress plugin by formatting with the following options: Mount -t reiser4 -o txmod=journal,noatime,onerror=remount-ro /dev/sdaX /mnt/reiser4 Note: With X being your partition number! mkfs.reiser4 /dev/sdaX Another workaround is to compile systemD by source without ACL support, but is not recommended. Access Control Lists is not implemented and as of linux-5.x.x requires that Systemd/Journal either logs to a seperate logging daemon or to Tmpfs.It is still not included in the official Linux kernel, but patches for Linux-5.x is already available.Even LILO as the only bootloader officially supporting Reiser4 seems to have issues with it when /boot is formatted as Reiser4.To avoid having issues on laptops using TLP for power saving, it is recommended to disable the options for SATA Link power saving in /etc/default/tlp (again, as with Btrfs). It consumes a little more CPU than other filesystems (just like Btrfs).