This diff clarifies when a virtual "a" partition may be
used with udfclient images.
Thanks to Jens A. Griepen for bringing the matter to my
attention.
diff --git a/sysutils/udfclient/Makefile b/sysutils/udfclient/Makefile
index 7dc63d78d72..7c2c926fa9f 100644
--- a/sysutils/udfclient/Makefile
+++ b/sysutils/udfclient/Makefile
@@ -2,7 +2,7 @@
COMMENT = userland implementation of the UDF filesystem
-V = 0.8.11
+V = 0.8.11p0
DISTNAME = UDFclient.${V}
PKGNAME = udfclient-${V}
CATEGORIES = sysutils
diff --git a/sysutils/udfclient/pkg/README b/sysutils/udfclient/pkg/README
index caa00e7de1e..410d4606cc6 100644
--- a/sysutils/udfclient/pkg/README
+++ b/sysutils/udfclient/pkg/README
@@ -31,12 +31,15 @@ Special files and links
UDF on disk drives
------------------
-Disklabels are not used, except for virtual partition "a" with
-2048-byte blocksize devices. MBRs are not used, the filesystem
-begins at LBA 0. Partition "c" should be used if writing directly
-to a drive instead of an image file. If the drive contains prior
-data, zero the leading sectors before use as shown in the first
-command below.
+OpenBSD disklabels are not used on storage media. OpenBSD will create
+an in-memory virtual "a" partition when natively mounting UDF filesystems
+read-only on 2048-byte block devices or images; see Interoperability with
+mount_udf(8) below.
+
+MBRs are not used, the filesystem begins at LBA 0. Raw partition "c"
+should be used if writing directly to a drive instead of an image file.
+If the drive contains prior data, zero the leading sectors before use as
+shown in the first command below.
# dd if=/dev/zero of=/dev/rsd9c count=63
# newfs_udf -L shared.drive /dev/rsd9c
