Allow data-offset to be specified per-device for create

 mdadm --create /dev/md0 .... /dev/sda1:1024 /dev/sdb1:2048 ...

The size is in K unless a suffix: K M G is given.
The suffix 's' means sectors.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/mdadm.c b/mdadm.c
index 5f395714..42544f1a 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -465,7 +465,11 @@ int main(int argc, char *argv[])
 					"Second value is %s.\n", optarg);
 				exit(2);
 			}
-			data_offset = parse_size(optarg);
+			if (mode == CREATE &&
+			    strcmp(optarg, "variable") == 0)
+				data_offset = VARIABLE_OFFSET;
+			else
+				data_offset = parse_size(optarg);
 			if (data_offset == INVALID_SECTORS) {
 				fprintf(stderr, Name ": invalid data-offset: %s\n",
 					optarg);