On 2004-11-25T08:55:09, Andreas Huck <dm-devel@xxxxxxx> wrote: > First, how to get a WWID? I have 4 devices with 2 paths each. > `scsidev -s` should provide it but doesn't: > > # scsidev -s > Serial number of /dev/scsi/sgh1-1c0i0l3: "0003cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh1-0c0i0l3: "0003cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh1-1c0i0l2: "0002cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh1-0c0i0l2: "0002cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh1-1c0i0l1: "0001cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh1-0c0i0l1: "0001cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh1-1c0i0l0: "0000cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh1-0c0i0l0: "0000cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh0-0c0i0l3: "0003cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh0-0c0i0l3: "0003cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh0-0c0i0l2: "0002cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh0-0c0i0l2: "0002cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh0-0c0i0l1: "0001cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh0-0c0i0l1: "0001cc7420000080e512cc740000000000000000" > HSV OS Id: 0 > Serial number of /dev/scsi/sgh0-0c0i0l0: "0000cc7420000080e512cc740000000000000000" > Serial number of /dev/scsi/sdh0-0c0i0l0: "0000cc7420000080e512cc740000000000000000" > HSV OS Id: 0 There are 4 distinct WWIDs in there; I fail to see your problem? This should work mostly out of the box. > I tried a direct approach by dmsetup, but didn't get a device: > > # echo "0 274968576 multipath 10 2 1 round-robin 1 0 \ > /dev/sdb 1 round-robin 1 0 /dev/sdf" | dmsetup create /dev/dm-0 > k_set_name: Device /dev/dm-0 not found > Command failed This is the wrong syntax for dmsetup; you need to give a table name. "dmsetup create whatever" would create the appropriate table. > # /sbin/devmap_name 8 16 > No devices found No wonder, there's no device map for 8:16, it's a SCSI device. > Do I overlook something important here? Yes. Try reading the documentation again ;-) Sincerely, Lars Marowsky-Brée <lmb@xxxxxxx> -- High Availability & Clustering SUSE Labs, Research and Development SUSE LINUX Products GmbH - A Novell Business