[arch-releng] [RFC] [PATCH] [archiso] README: add: Transfer ISO file to target medium

[Gerardo Exequiel Pozzi]

Please review, since my english is not the best. Thanks.
(Otherwise I will merge in about one week)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386 at yahoo.com.ar>
---
 README |  115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)

diff --git a/README b/README
index 5df3128..f5577bb 100644
--- a/README
+++ b/README
@@ -10,6 +10,7 @@ INDEX
   * hooks/archiso_loop_mnt
 * Boot parameters (only for configs/releng)
   * etc/rc.conf
+* Transfer ISO file to target medium (configs/releng)
 * Build requirements
 * Image types generated by mkarchiso.
 * File format for aitab.
@@ -147,6 +148,120 @@ if nothing is specified on command line.
 
 
 
+*** Transfer ISO image to target medium (configs/releng)
+
+ISO images names consist of: archlinux-<YYYY>.<MM>.<DD>-<TYPE>-<ARCH>.iso
+
+Where:
+    <YYYY> Year
+    <MM> Month
+    <DD> Day
+    <TYPE> netinstall | core
+    <ARCH> i686 | x86_64 | dual(*)
+
+(*) "dual" includes both i686 and x86_64 architectures.
+
+
+** To -> CD / DVD / BD
+Note: All ISO images are booteable on a PC-BIOS via "El Torito" in no-emulation mode,
+      All x86_64 ISO images are booteable on a PC-EFI via "El Torito" in no-emulation mode.
+
+Nomeclature:
+    <B> scsibus number
+    <T> target number
+    <L> lun number
+    (Note: see cdrecord -scanbus, for these numbers)
+
+
+1) Write it directly using your favorite recording program.
+# cdrecord dev=<B>,<T>,<L> -dao archlinux-<YYYY>.<MM>.<DD>-<TYPE>-<ARCH>.iso
+
+
+** To -> USB Flash Drive (USB-key) / Memory card (SD) /
+         Hard-Disk Drive (HDD) / Solid-State Drive (SSD)
+
+Note: These steps are the general workflow, you can skip some of them,
+      using another filesystem if your bootloader supports it,
+      or installing to another directory than "arch/".
+      Just ensure that main boot params options (archisolabel= and
+      archisobasedir=) are set correctly according to your setup.
+
+Nomeclature:
+<DEV-TARGET>:   Device node of the drive where ISO contents should be copied
+                (example: /dev/sdx)
+<DEV-TARGET-N>: Device node of the partition on <DEV-TARGET>
+                (example: /dev/sdx1)
+<MNT-TARGET-N>: Mount point path where <DEV-TARGET-N> is mounted
+                (example: /mnt/sdx/1)
+<ISO-SOURCE>:   Path to the ISO file archlinux-<YYYY>.<MM>.<DD>-<TYPE>-<ARCH>.iso
+                (example: ~/archlinux-2012.04.16-netinstall-x86_64.iso)
+<FS-LABEL>:     Represents the filesystem label of the <ISO-SOURCE>
+                (example: ARCH_201204 [for all ~/archlinux-2012.04.*.iso])
+
+
+* PC-BIOS (MBR):
+
+1) Create one partition entry in MBR (of type "b" for FAT32 or "83" for EXTFS)
+   and mark it as "active" (booteable).
+# fdisk <DEV-TARGET>
+
+2) Create a FAT32 or EXTFS filesystem on such partition and setup a label.
+# mkfs.vfat -F 32 -n <FS-LABEL> <DEV-TARGET-N>
+# mkfs.ext2 -L <FS-LABEL> <DEV-TARGET-N>
+
+3) Mount target filesystem.
+# mount <DEV-TARGET-N> <MNT-TARGET-N>
+
+4) Extract ISO image on target filesystem.
+# bsdtar -x --exclude=isolinux/ --exclude=EFI/ -f <ISO-SOURCE> -C <MNT-TARGET-N>
+
+5) Install syslinux bootloader on target filesystem.
+# extlinux -i <MNT-TARGET-N>/arch/boot/syslinux
+
+6) Unmount target filesystem.
+# umount <MNT-TARGET-N>
+
+7) Install syslinux MBR boot code on target drive.
+# dd bs=440 count=1 conv=notrunc if=/usr/lib/syslinux/mbr.bin of=<DEV-TARGET>
+
+
+* PC-BIOS (ISOHYBRID-MBR):
+
+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.
+
+1) Dump ISO file to target medium.
+# dd if=<ISO-SOURCE> of=<DEV-TARGET>
+
+
+* PC-EFI (GPT) [x86_64 only]
+
+Note: Using here a GPT partition mode, but MBR should also work.
+      Optionally you can use your favorite EFI boot manager instead of an efi-shell+startup.nsh.
+
+1) Create one partition entry in GPT (of type "ef00")
+# gdisk <DEV-TARGET>
+
+2) Create a FAT32 filesystem on such partition and setup a label.
+# mkfs.vfat -F 32 -n <FS-LABEL> <DEV-TARGET-N>
+
+3) Mount target filesystem.
+# mount <DEV-TARGET-N> <MNT-TARGET-N>
+
+4) Extract ISO image on target filesystem.
+# bsdtar -x --exclude=isolinux/ --exclude=arch/boot/syslinux/ -f <ISO-SOURCE> -C <MNT-TARGET-N>
+
+5) Extract efiboot.img on EFI/ on target filesystem.
+# mcopy -s -i <MNT-TARGET-N>/EFI/archiso/efiboot.img ::/EFI <MNT-TARGET-N>/
+
+6) Remove uneeded efiboot.img
+# rm <MNT-TARGET-N>/EFI/archiso/efiboot.img
+
+7) Unmount target filesystem.
+# umount <MNT-TARGET-N>
+
+
+
 *** Build requirements
 
 ** For mkarchiso script needs these packages (build host):
-- 
1.7.9.6