Assemble: add support for RAID0 layouts.

[thirdparty/mdadm.git] / Assemble.c

diff --git a/Assemble.c b/Assemble.c
index b2e69144f1a26dc4db168a48ed0d99cd9bb1d78f..6b5a7c8ef7806d4305eef2f986c6457ae8ab8ebf 100644 (file)
--- a/Assemble.c
+++ b/Assemble.c
@@ -1031,6 +1031,11 @@ static int start_array(int mdfd,
                                pr_err("failed to add %s to %s: %s\n",
                                       devices[j].devname, mddev,
                                       strerror(errno));
+                               if (errno == EINVAL && content->array.level == 0 &&
+                                   content->array.layout != 0) {
+                                       cont_err("Possibly your kernel doesn't support RAID0 layouts.\n");
+                                       cont_err("Please upgrade.\n");
+                               }
                                if (i < content->array.raid_disks * 2 ||
                                    i == bestcnt)
                                        okcnt--;
@@ -1220,6 +1225,9 @@ static int start_array(int mdfd,
                        return 0;
                }
                pr_err("failed to RUN_ARRAY %s: %s\n", mddev, strerror(errno));
+               if (errno == 524 /* ENOTSUP */ &&
+                   content->array.level == 0 && content->array.layout == 0)
+                       cont_err("Please use --update=layout-original or --update=layout-alternate\n");
 
                if (!enough(content->array.level, content->array.raid_disks,
                            content->array.layout, 1, avail))