> it works (as far as I got it during the time I had) only > basically if configured with dmsetup manually. I.e. it fails > over once if the primary path fails. How far did you get it working? Well here is what I have: 1 DL585 running SLES 9 with kernel 2.6.5-7.111.5. Two Qlogic HBAs using the 8.00.00 driver. Each HBA is connected to a Fibre Channel switch (Total of two switches). Each switch also has a port from the target I am using connected to it. I am using HP arrays, XP128 and the XP12000, two ports on each arrays. After installing the OS and kernel. I dowloaded and installed udev-046 and tested that it worked by creating random rules and that works fine. However udevd is not started by default at system boot time. I had to manually start it. I then installed hotplug-2004-09-23.tar.gz I installed device-mapper 1.00.19 I installed multipath-tools-0.3.9 I created the following /etc/multipath.conf file: defaults { multipath_tool "/sbin/multipath -v 0 -S" udev_dir /dev polling_interval 10 default_selector "round-robin 0" default_path_grouping_policy multibus # default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n" default_getuid_callout "/sbin/scsi_id -g -u -s" default_prio_callout "/bin/false" } devnode_blacklist { devnode cciss devnode fd devnode hd devnode md devnode dm devnode sr devnode scd devnode st devnode ram devnode raw devnode loop } # # name : multipaths # scope : multipath & multipathd # desc : list of multipaths finest-grained settings # multipaths { # # name : multipath # scope : multipath & multipathd # desc : container for settings that apply to one specific multipath # multipath { wwid 360060e800427f600000027f600000302 alias Lun0 path_grouping_policy multibus path_checker readsector0 path_selector "round-robin 0" } multipath { wwid 360060e800427f600000027f600000303 alias Lun1 path_grouping_policy multibus path_checker readsector0 path_selector "round-robin 0" } } # name : devices # scope : multipath & multipathd # desc : list of per storage controler settings # overrides default settings (device_maps block) # overriden by per multipath settings (multipaths block) # devices { # # name : device # scope : multipath & multipathd # desc : settings for this specific storage controler # device { # vendor "HP" product "OPEN-" path_grouping_policy multibus getuid_callout "/sbin/scsi_id -g -u -s /block/%n" prio_callout "/sbin/pp_balance_units %d" path_checker readsector0 path_selector "round-robin 0" } I started the udev daemon I started the Multipathd daemon And I get the following: Dec 13 21:10:08 netsrv83 multipathd: --------start up-------- Dec 13 21:10:08 netsrv83 multipathd: start DM events thread Dec 13 21:10:08 netsrv83 multipathd: initial reconfigure multipath maps Dec 13 21:10:08 netsrv83 multipathd: no devmap found Dec 13 21:10:08 netsrv83 multipathd: path checkers start up Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 65:160 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 65:176 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 65:192 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 65:208 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 65:224 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 65:240 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:0 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:16 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:32 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:48 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:64 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:80 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:96 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:112 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:128 Dec 13 21:10:08 netsrv83 multipathd: path checker startup : 66:144 ...................... (more the the rest of the Luns) Followed by the following after a little while: Dec 13 21:12:40 netsrv83 multipathd: 67:64 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:80 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:96 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:112 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:128 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:144 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:160 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:176 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:192 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 67:208 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:16 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:32 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:48 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:64 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:80 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:96 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:112 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:128 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:144 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:160 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:176 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:192 : readsector0 checker reports path is down Dec 13 21:12:40 netsrv83 multipathd: 8:208 : readsector0 checker reports path is down What I am trying to do is setup Multipathing just for Lun zero and Lun one on the second storage device. My storage devices as seen by the HBA are as follows: SCSI Device Information: scsi-qla0-adapter-node=200000e08b177dc5; scsi-qla0-adapter-port=210000e08b177dc5; scsi-qla0-target-0=50060e8003c3de14; <-- Target 1 scsi-qla0-target-1=50060e800427f611; <-- Target 2 Running the command multipath -v 2 doesn't yield any output and /dev had no dm device created. > I didn't have time to figure out yet how it does the mapping > setup via > /etc/udev.d/block/ as suggested by Christophe on 11/26. > It might depend on the SCSI-Devices you have, I get valid > WWIDs only with "/sbin/scsi_id -g -p 0x80 -s" but that > doesn't solve the problem > of autodetecting yet. > SuSE does not have /etc/udev.d it's /etc/udev instead but there is no block folder under that path and I am not sure what you mean by setting up the mapping via /etc/udev/block. I get valid wwid with the default scsi_id usage: /sbin/scsi_id -g -u -s > I got some beta packages from the upcomming SLES9-SP1 from > SuSE-Support (multipath-tools-0.3.6, device-mapper-1.00.19 + > appropriate kernel) but will/might have the opportunity to > test it not earlier than next week. > Novell/SuSE probably doesn't like publishing links of their > beta packages but I assume they like that their packages are > well tested- so you might call the helpful RSchmidt from SuSE > Support or refer to ftp.suse.com/pub/people/ - and give some > feedback. I'll look into this. Thanks. Aboubacar.