Document support for booting from RAID 1C on sparc64

The bootloader (ofwboot) got support some time ago, but installboot(8) had
to be fixed as well for multi-chunk volumes (1C requires at least two).

As of today, the latest sparc64 install72.img can perform a default install
onto a passphrase-protected 1C volume across four chunk disks, resulting in
a bootable system without requiring manual invervention, just like amd64.

1 files changed, 5 insertions, 4 deletions

diff --git a/share/man/man4/softraid.4 b/share/man/man4/softraid.4
index 99c435f6ef5..c36263ae02c 100644
--- a/share/man/man4/softraid.4
+++ b/share/man/man4/softraid.4
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: softraid.4,v 1.49 2022/09/04 08:06:40 kn Exp $
+.\"	$OpenBSD: softraid.4,v 1.50 2022/09/06 22:13:31 kn 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: September 4 2022 $
+.Dd $Mdocdate: September 6 2022 $
 .Dt SOFTRAID 4
 .Os
 .Sh NAME
@@ -120,7 +120,7 @@ in the boot storage area of the
 volume.
 Boot support is currently limited to the CRYPTO and RAID 1 disciplines
 on the amd64, arm64, i386, and sparc64 platforms.
-amd64 also has boot support for the RAID 1C discipline.
+amd64 and sparc64 also have boot support for the RAID 1C discipline.
 On sparc64, bootable chunks must be RAID partitions using the letter
 .Sq a .
 At the
@@ -128,7 +128,8 @@ At the
 prompt, softraid volumes have names beginning with
 .Sq sr
 and can be booted from like a normal disk device.
-CRYPTO volumes will require a decryption passphrase or keydisk at boot time.
+CRYPTO and 1C volumes will require a decryption passphrase or keydisk
+at boot time.
 .Pp
 The status of
 .Nm