On Wed, 2008-03-12 at 16:36 +0100, Jacek Lipkowski wrote: > Hello, > > I'm having a problem with getting dm-rdac to work. I do realize that this > is a development list, but it seems like the only place to ask for help, > and http://christophe.varoqui.free.fr is down. In the logs i get the > following errors, after starting multipathd: > > device-mapper: multipath rdac: using RDAC command with timeout 60000 > device-mapper: table: 253:0: multipath: Unknown error > device-mapper: ioctl: error adding target to table > > multipath -ll doesn't show anything. Can you send the o/p of "multipath -v4". Also, can you change the prio_callout from mpath_prio_rdac to mpath_prio_tpc. > > The system is the following: > - centos 5.1, with kernel changed to vanilla 2.6.24.3 > - tried both multipath-tools from centos (patched 0.4.7), and vanilla > 0.4.8 > - 2 qlogic QLA2340 hba's, connected to different fabrics > - 2 IBM DS4500 Storage Servers (each connected to both fabrics), each > exports two luns, one 1.5TB lun, and one 100MB lun. I've also tried using > one IBM DS4500 Storage Server with one 1.5TB lun, and one 100MB lun. > > If i disable AVT (change the host type from Linux to LNXCLVMWARE) i also > get read errors from unavaliable paths: > end_request: I/O error, dev sda, sector 0 > end_request: I/O error, dev sdd, sector 0 > etc... (this is normal). > > I can get multipath to work using the tur checker. If you are running in AVT, you do not need dm-rdac (or the rdac path checker) at all. Do you see any problems if you do not have them in your multipath.conf file ? > > my /etc/multipath.conf is the following: > defaults { > multipath_tool "/sbin/multipath -v 0 -S" > udev_dir /dev > polling_interval 10 > default_selector round-robin > default_selector_args 0 > default_path_grouping_policy failover > default_getuid_callout "/sbin/scsi_id -g -u -s" > default_prio_callout "/bin/false" > user_friendly_names yes > } > devnode_blacklist { > devnode fd > devnode hd > devnode dm > devnode sr > devnode scd > devnode st > devnode ram > devnode raw > devnode loop > #root fs is on /dev/rd/c0d0 > # devnode sda > # devnode sdb > } > > > devices { > device { > vendor IBM > product 1742-900 > path_grouping_policy group_by_prio > hardware_handler "1 rdac" > prio_callout "/sbin/mpath_prio_rdac /dev/%n" > failback immediate > path_checker rdac > getuid_callout "/sbin/scsi_id -g -u -s /block/%n" > } > } > > > multipaths { > multipath { > device { > vendor IBM > product 1742-900 > } > } > } > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel -- ---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - sekharan@xxxxxxxxxx | .......you may get it. ---------------------------------------------------------------------- -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
