Hello,

I bought 30TB HDD and got error

doas bioctl -c C -r auto -l 68879980648badec.i softraid0

softraid0: CRYPTO exceeds maximum size (58594426255 > 34359738368)

I am proposing these changes to man pages:

--- /home/navratil/OpenBSD/src/src/sbin/bioctl/bioctl.8	Thu Nov 14 19:57:41 2024
+++ bioctl.8	Fri Sep  5 19:08:09 2025
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: bioctl.8,v 1.116 2024/07/15 05:36:08 jmc Exp $
+.\"	$OpenBSD: bioctl.8,v 1.117 2024/09/05 19:03:35 jmc Exp $
 .\"
 .\" Copyright (c) 2004, 2005 Marco Peereboom
 .\"
@@ -23,7 +23,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: July 15 2024 $
+.Dd $Mdocdate: September 5 2025 $
 .Dt BIOCTL 8
 .Os
 .Sh NAME
@@ -360,6 +360,9 @@
 .Bd -literal -offset 3n
 # bioctl -v nvme0
 .Ed
+.Sh CAVEATS
+.Nm
+CRYPTO discipline is limited to approximately 16 TiB per volume.
 .Sh SEE ALSO
 .Xr bio 4 ,
 .Xr scsi 4 ,


--- /home/navratil/OpenBSD/src/src/share/man/man4/softraid.4	Fri Apr 18 08:28:49 2025
+++ softraid.4	Fri Sep  5 19:02:10 2025
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: softraid.4,v 1.56 2025/04/13 13:17:31 jmc Exp $
+.\"	$OpenBSD: softraid.4,v 1.57 2025/09/05 18:56:23 jmc Exp $
 .\"
 .\" Copyright (c) 2007 Todd T. Fries   <todd@OpenBSD.org>
 .\" Copyright (c) 2007 Marco Peereboom <marco@OpenBSD.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 13 2025 $
+.Dd $Mdocdate: September 5 2025 $
 .Dt SOFTRAID 4
 .Os
 .Sh NAME
@@ -271,3 +271,9 @@
 RAID is
 .Em not
 a substitute for good backup practices.
+.Pp
+CRYPTO volumes are limited to approximately 16 TiB (17.59 TB) due to
+32-bit sector addressing limitations. Attempting to create CRYPTO
+volumes on larger devices will fail with
+.Em "exceeds maximum size"
+error.

Best regards,
Jiří


-- 
Jiri Navratil, https://www.navratil.cz, +420 777 224 245