From: NeilBrown People try to use raid auto-detect with version-1 superblocks (which is not supported) and get confused when they are told they have an invalid superblock. So be more explicit, and say it it is not a valid v0.90 superblock. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton --- drivers/md/md.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff -puN drivers/md/md.c~md-improve-message-about-invalid-superblock-during-autodetect drivers/md/md.c --- a/drivers/md/md.c~md-improve-message-about-invalid-superblock-during-autodetect +++ a/drivers/md/md.c @@ -2073,9 +2073,11 @@ static mdk_rdev_t *md_import_device(dev_ err = super_types[super_format]. load_super(rdev, NULL, super_minor); if (err == -EINVAL) { - printk(KERN_WARNING - "md: %s has invalid sb, not importing!\n", - bdevname(rdev->bdev,b)); + printk(KERN_WARNING + "md: %s does not have a valid v%d.%d " + "superblock, not importing!\n", + bdevname(rdev->bdev,b), + super_format, super_minor); goto abort_free; } if (err < 0) { @@ -5772,7 +5774,7 @@ static void autostart_arrays(int part) for (i = 0; i < dev_cnt; i++) { dev_t dev = detected_devices[i]; - rdev = md_import_device(dev,0, 0); + rdev = md_import_device(dev,0, 90); if (IS_ERR(rdev)) continue; _