diff options
-rw-r--r-- | blockdev.c | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -487,7 +487,11 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts, drv = bdrv_find_whitelisted_format(buf, ro); if (!drv) { - error_report("'%s' invalid format", buf); + if (!ro && bdrv_find_whitelisted_format(buf, !ro)) { + error_report("'%s' can be only used as read-only device.", buf); + } else { + error_report("'%s' invalid format", buf); + } return NULL; } } |