--- /etc/disktab	Sun Oct  1 16:28:39 2000
+++ /etc/disktab	Sun Oct  1 16:27:59 2000
@@ -195,11 +195,11 @@ 
 	:pc#576600:oc#0:\
 	:pa#576600:oa#0:ta=4.2BSD:ba#8192:fa#1024:
 
-mta3230|mo230|IBM MTA-3230 230 Meg 3.5inch Magneto-Optical:\
-	:ty=removeable:dt=SCSI:rm#3600:\
-	:se#512:nt#64:ns#32:nc#216:sc#2048:su#444384:\
-	:pa#444384:oa#0:ba#4096:fa#0:ta=4.2BSD:\
-	:pc#444384:oc#0:
+#mta3230|mo230|IBM MTA-3230 230 Meg 3.5inch Magneto-Optical:\
+#	:ty=removeable:dt=SCSI:rm#3600:\
+#	:se#512:nt#64:ns#32:nc#216:sc#2048:su#444384:\
+#	:pa#444384:oa#0:ba#4096:fa#0:ta=4.2BSD:\
+#	:pc#444384:oc#0:
 
 minimum:ty=mfs:se#512:nt#1:rm#300:\
 	:ns#2880:nc#1:\
@@ -216,4 +216,42 @@ 
 	:pa#196608:oa#0:ba#4096:fa#512:\
 	:pb#196608:ob#0:bb#4096:fb#512:\
 	:pc#196608:oc#0:bc#4096:fc#512:
+
+
+# ---- 90 mm magneto optical disk formats (dedicated disk): ----
+# Prepare a disk as follows (e.g. using device da0):
+#	disklabel -B -w -r da0 mo230
+# or:
+#	disklabel -w -r da0 mo640
+# (the -B flag currrently doesn't work for 640 MB media).
+# and then:
+#	newfs -t 0 -u 0 -m 0 da0a
+# (t=0 and u=0 means the values from disklabel will be used for # tracks and
+# # sectors).
+
+
+mo230|Generic 3.5in 230MB MO disk:\
+	:ty=removeable:dt=SCSI:rm#3600:\
+	:se#512:nt#64:ns#32:nc#217:sc#2048:su#446325:\
+	:pa#446325:oa#0:ba#4096:fa#0:ta=4.2BSD:\
+	:pc#446325:oc#0:
+
+mo640|Generic 3.5in 640MB MO disk:\
+        :ty=removable:dt=SCSI:rm#3600:\
+	:se#2048:nt#64:ns#32:nc#151:sc#2048:su#310352:\
+        :pa#310352:oa#0:ba#8192:fa#2048:ta=4.2BSD:\
+        :pc#310352:oc#0:
+
+mo230_max|Generic 3.5in 230MB MO disk using max capcity for CHS based calculations:\
+        :ty=removeable:dt=SCSI:rm#3600:\
+        :se#512:nt#25:ns#33:nc#541:\
+        :pa#446325:oa#0:ba#4096:fa#0:ta=4.2BSD:\
+        :pc#446325:oc#0:
+
+mo640_max|Generic 3.5in 640MB MO disk using max capcity for CHS based calculations:\
+        :ty=removeable:dt=SCSI:rm#3600:\
+        :se#2048:nt#28:ns#17:nc#652:\
+        :pa#310352:oa#0:ba#8192:fa#2048:ta=4.2BSD:\
+        :pc#310352:oc#0:
+