[archiso] Update README.knownissues

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

docs/README.knownissues

@@ -8,3 +8,16 @@
     and device mapper devices made by archiso will be "free" on "shutdown tmpfs"
     (A.K.A deinitramfs), build at initramfs by [archiso_shutdown] initcpio hook.
     Proper shutdown is mostly important when persistent is used.
+
+** (2) ISOHYBRID-MBR does boot on some hardware:
+
+    Some firmwares (BIOS) gets confused about using this hack
+    (first partition start at offset 0 -> MBR "infinite recursion").
+    Solutions:
+        (a) Do not use this method, instead copy files manually and
+            setup the bootloader [PC-BIOS (MBR)] (See README.transfer).
+        (b) Change offset of the partition on the ISO or on the target medium
+            (if ISO is already dumped):
+            # isohybrid.pl -offset 1 <ISO-SOURCE>
+            OR
+            # isohybrid.pl -offset 1 <DEV-TARGET>

docs/README.transfer

@@ -98,6 +98,7 @@ Note: COW is not supported on NTFS.
 
 Note: This method is the most easily, quick and dirty, but is the most limited
       if you want to use your target medium for other purposes.
+      See README.knownissues (2) if using this method does not boot.
 
 1) Dump ISO file to target medium.
 # dd if=<ISO-SOURCE> of=<DEV-TARGET>