+<li><b>ReiserFS</b>—This driver originated with rEFIt. It can be used
+ in the same way as the ext2fs and ext4fs drivers. <b>Caution:</b> If you
+ use this driver, you should use the <tt>notail</tt> option in Linux's
+ <tt>/etc/fstab</tt> file for the partition(s) you want the EFI to read.
+ This is because the driver doesn't properly handle ReiserFS's
+ "tail-packing" feature, so files can seem to be corrupted in EFI if you
+ use this feature, which is disabled by <tt>notail</tt>. In my tests,
+ this is the fastest of rEFInd's EFI filesystem drivers, so if you find
+ your kernel load times are slow, you might consider moving your kernel
+ to a ReiserFS <tt>/boot</tt> partition. (Such problems affect a small
+ subset of EFI-based computers.)</li>
+
+<li><b>Btrfs</b>—</b>Samuel Liao contributed this driver, which is
+ based on the rEFIt/rEFInd driver framework and algorithms from the GRUB
+ 2.0 Btrfs driver. I've tested this driver with simple one-partition
+ filesystems on several installations, and with a filesystem that spans
+ two physical devices on one (although I've made no attempt to ensure
+ that the driver can actually read files that span both devices). Samuel
+ Liao has used the driver with a compressed Btrfs volume. The driver will
+ handle subvolumes, but you may need to add kernel options if you're
+ booting a Linux kernel directly from a filesystem that uses subvolumes.
+ For instance, when booting Ubuntu from Btrfs, <tt>also_scan_dirs +
+ @/boot</tt> must be set in <tt>refind.conf</tt> and
+ <tt>rootflags=subvol=@</tt> must be added to the kernel options in
+ <tt>refind_linux.conf</tt>. Without the first of these options, rEFInd
+ can not locate the kernel; and without the second, the boot fails with a
+ message to the effect that the initial RAM disk could not find
+ <tt>/sbin/init</tt>. rEFInd 0.10.0 adds <tt>@/boot</tt> as a standard
+ option to <tt>also_scan_dirs</tt>, and its <tt>refind-install</tt> and
+ <tt>mkrlconf</tt> scripts should pick up the root flags, assuming the
+ system is booted into the regular installation. These additions make it
+ easier to set up rEFInd to work with Btrfs.</li>
+
+<p class="sidebar"><b>Tip:</b> If you partition a USB flash drive and use <tt>dd</tt> to copy Linux <tt>.iso</tt> images to the drive's individual partitions, the rEFInd ISO-9660 driver enables rEFInd to boot multiple Linux distributions' installers from the USB flash drive. I can't promise this feature will work with all distributions, but it does work with some.</p>
+