Hi Manu, On Wed June 1 2005 3:28 am, Manu Tayal wrote: > The version of Linux I am using is 2.4.26 and the version of device-mapper > is 1.00.18. > > I found the logs as: > > Device-mapper: device /dev/hda1 too small for target > Device-mapper: dm-linear: Device lookup failed > Device-mapper: error adding target to table > > Device-mapper: device /dev/hda5 too small for target > Device-mapper: dm-linear: Device lookup failed > Device-mapper: error adding target to table > > So there seems to be some size problem. > > blockdev --getsize /dev/hda1 = 2041137 > blockdev --getsize /dev/hda5 = 1043217 > > Is there a limitation on the size of the device or is this a bug? On 2.4 kernels, block device sizes are normally calculated in kilobytes, dispite the output you get from "blockdev --getsize". Thus you should always take the size in sectors and round down to the nearest even number so that it translates to a whole number of kilobytes. You can do this by simply masking off the lowest bit. So the command to create your DM device would look like this: echo 0 $(($(blockdev --getsize /dev/hda1) & ~1)) linear /dev/hda1 0 | \ dmsetup create hda1 On 2.6 kernels, block device sizes are recorded in sectors, and you would not experience this problem. -- Kevin Corry kevcorry@xxxxxxxxxx http://www.ibm.com/linux/ http://evms.sourceforge.net/
