Hello, I was going through the code of Device Mapper and I found that it doesnt allow readahead option but read and write. Then I tried to use readahead in lvcreate but it gives error. If someone can explain this scenario and answer to my following queries i will be greatfull. 1) Can we use readahead option of lvcreate? 2) If yes, will it effect readahed of scsi? 3) If no, then why they have provided this option in lvcreate? Thanks and Regards, Shahid Shaikh. Software Engineer. Patni Computer Systems Ltd. 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. _____________________________________________________________________