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Multipath problem on s390x



Hi

I have problem with disk which fail for multipath....

Not able to get multipath for 4 disks ... Is it problem devicemapper problem? or its bug with debain ?

Please help me its urgent
_________________________________________________________________________
# uname -a
Linux Z9LNX05 2.6.18-6-s390 #1 SMP Mon Feb 11 09:16:19 UTC 2008 s390 GNU/Linux
# cat /etc/issue
Debian GNU/Linux 4.0 \n \l

______________________________________________________________________________________________________
/etc/multipath looks fine

# Blacklist all devices by default. Remove this to enable multipathing
# on the default devices.
devnode_blacklist {
       # devnode "*"
        devnode "dasda.*"
}

## Use user friendly names, instead of using WWIDs as names.
defaults {
        user_friendly_names yes
}


## By default, devices with vendor = "IBM" and product = "S/390.*" are
##
defaults {
        udev_dir                /dev
        polling_interval        10
        selector                "round-robin 0"
        path_grouping_policy    multibus
        getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
        prio_callout            /bin/true
        path_checker            readsector0
        rr_min_io               100
        rr_weight               priorities
#       failback                immediate
        no_path_retry           fail
        user_friendly_name      yes
}
##
## The wwid line in the following blacklist section is shown as an example
##
devnode_blacklist {
#       wwid 26353900f02796769
        devnode "^(ram|raw|loop|fd|md|dasd.*|sr|scd|st)[0-9]*"
        devnode "^hd[a-z]"
        devnode "^cciss!c[0-9]d[0-9]*"
}


But when i ran
_______________________________________________________________________________________________________
lsscsi
[0:0:0:0]    disk    IBM      2107900          .437  /dev/sda
[0:0:0:1]    disk    IBM      2107900          .437  /dev/sdb
[0:0:0:2]    disk    IBM      2107900          .437  /dev/sdc
[0:0:0:3]    disk    IBM      2107900          .437  /dev/sdd

__________________________________________________________________________________________________________

multipath -ll


mpath2 (36005076305ffc3100000000000001003) dm-2 ,
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ #:#:#:#   -     #:#    [active][faulty]               ----------------------------------------------------------------(Eroor)
mpath38 (36005076305ffc3100000000000001112) dm-38 IBM,2107900
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:38  sdam  66:96  [active][ready]
mpath23 (36005076305ffc3100000000000001018) dm-23 IBM,2107900
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:23  sdx   65:112 [active][ready]
mpath55 (36005076305ffc3100000000000001123) dm-55 IBM,2107900
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:55  sdbd  67:112 [active][ready]
mpath40 (36005076305ffc3100000000000001114) dm-40 IBM,2107900
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:40  sdao  66:128 [active][ready]
mpath87 (36005076305ffc3100000000000001042) dm-87 IBM,2107900
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:87  sdcj  69:112 [active][ready]
mpath72 (36005076305ffc3100000000000001033) dm-72 IBM,2107900
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:72  sdbu  68:128 [active][ready]
mpath1 (36005076305ffc3100000000000001002) dm-1 ,
[size=50G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ #:#:#:#   -     #:#    [active][faulty]------------------------------------------------------------------------(Error)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
# fdisk -l /dev/sda

Disk /dev/sda: 53.6 GB, 53687091200 bytes
64 heads, 32 sectors/track, 51200 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes

Disk /dev/sda doesn't contain a valid partition table



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