build_library: Create MiniOS disk layout with two partitions.
Add two miniOS partitions. One in the beginning and one at the end
after stateful partition. The partition in the beginning has priority.
Add a new feature `back_partition` to the cgpt script to be able to
to place MiniOS -B behind the expanded stateful partition at the
end of the disk.
start size part contents
0 1 PMBR (Boot GUID:)
1 1 Pri GPT header
2 32 Pri GPT table
5349376 8401041 1 Label: "STATE"
Type: Linux data
UUID: 31694155-F9E7-404C-8179-C5BEA9C8BC83
131141 65536 2 Label: "KERN-A"
Type: ChromeOS kernel
UUID: 5AE5238C-2648-FD47-AF92-6D566F3320E5
Attr: priority=15 tries=15 successful=0
434176 4915200 3 Label: "ROOT-A"
Type: ChromeOS rootfs
UUID: 411C7DB2-DC13-464A-99B0-000DBB004AE0
...
64 131072 13 Label: "MiniOS-A"
Type: ChromeOS kernel
UUID: D3C1DE80-998A-054C-97F7-6A43727C90F2
Attr: priority=15 tries=5 successful=0
13750417 131072 14 Label: "MiniOS-B"
Type: ChromeOS kernel
UUID: C24FF886-BAB9-7342-9C8A-F42CDB4591F7
Attr: priority=0 tries=0 successful=0
BUG=b:174913800
TEST=flash and chromeos-install on hatch
Change-Id: I2d45248b7cf88c5f20d31f33d0fe8df30197b5a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2565271
Tested-by: Vyshu Khota <vyshu@google.com>
Commit-Queue: Vyshu Khota <vyshu@google.com>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
3 files changed
