Hi , i came across a problem with lvchange command. I have a VG with 3 pv and a lv created using command lvcreate -i3 -I32 -l98 -nmy_lv my_vg lvdisplay shows 1024 as the value for Read Ahead Sectors. When i use the command lvchange to change the value of read ahead sector with value more that or equal to 256 i get following error.. linux# lvchange -r 340 /dev/my_vg/my_lv lvchange -- ERROR "Invalid Argument" read ahead sector change linux# linux# After debugging i found that in drivers/block/blkpg.c file blk_ioctl( ) Case BLKRASET : if (arg > 0xff ) return -EINVAL; Effectively this does not allow value greater that 255 for read ahead. Is there a limitation that the read ahead sectors can't have value more than 255 ? If yes then why lvdisplay shows 1024 as the default value for read ahead sectors. Thanks -Sachin _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
