Hello, Posted this to RHEL4 list bot got no answer. So trying to ask here. Also I found this document: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00635587/c00635587.pdf?jumpid=reg_R1002_USEN and it says that dm multipath is not supported for active-passive storage. ------------------------------------------------------------------------ I'm trying to upgrade our RHEL3 machine to RHEL4 and now have problems with multipath. System is HP DL385 (Opteron) server with two QLogic 2312 FC controllers connected to HP MSA1500 storage (active/passive). Like specified in documents I edited /etc/multipath.conf file but have few problems. First if I add the following line to /etc/fstab: /dev/mpath/mpath0p1 /stor ext3 noatime,data=writeback 1 2 during boot I got such fsck errors: Checking root filesystem /dev/VolGroup00/root: clean, 27140/524288 files, 220798/1048576 blocks [ OK ] Remounting root filesystem in read-write mode: [ OK ] Setting up Logical Volume Management: [ OK ] Checking filesystems /boot: clean, 34/26104 files, 13499/104388 blocks /dev/VolGroup00/ora: clean, 27/13107200 files, 434800/262144001blocks /dev/VolGroup00/var: clean, 168/1310720 files, 60040/2621440 blocks fsck.ext3/dev/mpath/mpath0p1: The superblock could not be read or does not describe a correct filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> : No such file or directory while trying to open /dev/mpath/mpath0p1 It looks like /dev/mpath/mpath0p1 symlink is created a bit later. But what to specify in /etc/fstab? /dev/dm-5 is clearly not a solution since it can change after any reboot. /etc/multipath.conf is below. multipath output: # multipath -ll mpath0 (3600508b300908600ac54cf7b31f50003) [size=143 GB][features="0"][hwhandler="0"] \_ round-robin 0 [enabled] \_ 0:0:0:3 sda 8:0 [active][ghost] \_ round-robin 0 [enabled] \_ 1:0:0:3 sdb 8:16 [active][ready] Also what to put for path_grouping_policy and path_checker? And dmesg is being filled with such messages: Device sda not ready. end_request: I/O error, dev sda, sector 4255 device-mapper: dm-multipath: Failing path 8:0. I tried to call our HP representative (we bought RHEL via HP) but got an answer that supported solution by HP is QLogic driver. Thanks, Mindaugas defaults { user_friendly_names yes } defaults { udev_dir /dev polling_interval 10 selector "round-robin 0" path_grouping_policy failover getuid_callout "/sbin/scsi_id -g -u -s /block/%n" prio_callout /bin/true path_checker hp_sw rr_min_io 100 rr_weight priorities failback immediate no_path_retry fail user_friendly_name yes } devnode_blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" devnode "^hd[a-z]" devnode "^cciss!c[0-9]d[0-9]*" } -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
