Hi all I notice in sd.c, we call sd_revalidate_disk twice in function sd_probe_async? Are there some special reasons? I track the git history, and found the second one is add by From 3821d768912a47ddbd6cab52943a8284df88003c Mon Sep 17 00:00:00 2001 From: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Date: Sat, 23 May 2009 11:43:38 -0400 Subject: [PATCH] sd: Detect non-rotational devices Detect non-rotational devices and set the queue flag accordingly. Could anyone tell me why? Thanks Jack -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html