Hi vivek, Regarding your query >>When a user program issues a read command from a >>file residing on a logical volume, how does the call actually gets >>mapped onto the hard disk. We believe that the kernel passes the >>"generic" command to the device mapper which then makes the final >>translation on the basis of mapping tables stored with it. We just >>wanted to be sure that LVM2 code does figure in the translation of the >>read requests from the user applications to the disk. The lv on which filesystem is created,when the user use this lv in read/write,the lv is mapped to corresponding dm device.The dm device pass the read/write request to underlying hard disk/SCSI device as the dm device does not have its own proper request queue to fulfill read/write request. LVM is just a user interface in this case.Nothing to do with kernel.It interacts with kernel using dm module. Hope i answred your question.Let me know if it is not clear. Regards Sandhya _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
