Hello Chris, I have written a sample psuedo driver which is basically consolidating multiple paths to LUNs. So I need prevent SCSI devices from scanning. I gone thro' lvm.conf and found out that md is doing the similar thing by setting following value in lvm.conf md_component_detection = 1 this parameter, if set, prevents scanning of all the SCSI devices contributed in the creation of md. So is there any parameter in LVM2 or device mapper, setting or clearing which can prevent scanning of SCSI devices used for my psuedo driver. Obviously other than filtering it out. Thanks and Regards, Shahid Shaikh. Software Engineer. http://www.patni.com World-Wide Partnerships. World-Class Solutions. _____________________________________________________________________ This e-mail message may contain proprietary, confidential or legally privileged information for the sole use of the person or entity to whom this message was originally addressed. Any review, e-transmission dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this e-mail in error kindly delete this e-mail from your records. If it appears that this mail has been forwarded to you without proper authority, please notify us immediately at netadmin@xxxxxxxxx and delete this mail. _____________________________________________________________________