Hi all
we have two Rac cluster in our environment. we have asked our storage team to provide luns for adding space to our rac. Right now in one our server luns are visible but not in another. But if i see dmesg in servers i can see disk attached but not able to see them. even iostat showing disks as well, multipath -ll not showing those disk. all online rescan has been done and multipath.conf blacklist has been removed and multipath reload has been done.
env- redhat 5.5 - 2.6.18-371.9.1.el5PAE
lsscsi output -
Code:
[3:0:2:27] disk IBM 2107900 1.32 -
[3:0:2:28] disk IBM 2107900 1.32 -
[3:0:2:29] disk IBM 2107900 1.32 -
[3:0:2:30] disk IBM 2107900 1.32 -
-----------------------------------------------------------
[4:0:2:27] disk IBM 2107900 1.32 -
[4:0:2:28] disk IBM 2107900 1.32 -
[4:0:2:29] disk IBM 2107900 1.32 -
[4:0:2:30] disk IBM 2107900 1.32 -
dmesg error
Code:
SCSI device sdcz: 285212672 512-byte hdwr sectors (146029 MB)
sdcz: Write Protect is off
sdcz: Mode Sense: ed 00 00 08
SCSI device sdcz: drive cache: write back
sdcz: detected capacity change from 0 to 146028888064
SCSI device sdda: 285212672 512-byte hdwr sectors (146029 MB)
sdda: Write Protect is off
sdda: Mode Sense: ed 00 00 08
SCSI device sdda: drive cache: write back
sdda: detected capacity change from 0 to 146028888064
SCSI device sddb: 285212672 512-byte hdwr sectors (146029 MB)
sddb: Write Protect is off
sddb: Mode Sense: ed 00 00 08
SCSI device sddb: drive cache: write back
sddb: detected capacity change from 0 to 146028888064
SCSI device sddc: 285212672 512-byte hdwr sectors (146029 MB)
sddc: Write Protect is off
sddc: Mode Sense: ed 00 00 08
SCSI device sddc: drive cache: write back
sddc: detected capacity change from 0 to 146028888064
SCSI device sddd: 285212672 512-byte hdwr sectors (146029 MB)
sddd: Write Protect is off
sddd: Mode Sense: ed 00 00 08
SCSI device sddd: drive cache: write back
sddd: detected capacity change from 0 to 146028888064
SCSI device sdde: 285212672 512-byte hdwr sectors (146029 MB)
sdde: Write Protect is off
sdde: Mode Sense: ed 00 00 08
SCSI device sdde: drive cache: write back
sdde: detected capacity change from 0 to 146028888064
SCSI device sddf: 285212672 512-byte hdwr sectors (146029 MB)
sddf: Write Protect is off
sddf: Mode Sense: ed 00 00 08
SCSI device sddf: drive cache: write back
sddf: detected capacity change from 0 to 146028888064
SCSI device sddg: 285212672 512-byte hdwr sectors (146029 MB)
sddg: Write Protect is off
sddg: Mode Sense: ed 00 00 08
SCSI device sddg: drive cache: write back
sddg: detected capacity change from 0 to 146028888064
iostat -
Code:
sddd 0.00 0.00 0.00 16 0
sdde 0.00 0.00 0.00 16 0
sddf 0.00 0.00 0.00 16 0
sddg 0.00 0.00 0.00 16 0
sdcz 0.00 0.00 0.00 16 0
sdda 0.00 0.00 0.00 16 0
sddb 0.00 0.00 0.00 16 0
sddc 0.00 0.00 0.00 16 0
Multipath.conf
Code:
# Blacklist all devices by default. Remove this to enable multipathing
# on the default devices.
#blacklist {
#devnode "*"
#}
blacklist {
device {
vendor "IBM"
product "*"
}
}
######
blacklist_exceptions {
device {
vendor "IBM"
product "2107900"
}
}
#blacklist {
# device {
# vendor "IBM"
# product "*"
# }
#}
## By default, devices with vendor = "IBM" and product = "S/390.*" are
## blacklisted. To enable mulitpathing on these devies, uncomment the
## following lines.
#blacklist_exceptions {
# device {
# vendor "IBM"
# product "2107900"
# }
#}
## Use user friendly names, instead of using WWIDs as names.
defaults {
user_friendly_names yes
# path_grouping_policy multibus
}
##
## Here is an example of how to configure some standard options.
##
#
##
## The wwid line in the following blacklist section is shown as an example
## of how to blacklist devices by wwid. The 2 devnode lines are the
## compiled in default blacklist. If you want to blacklist entire types
## of devices, such as all scsi devices, you should use a devnode line.
## However, if you want to blacklist specific devices, you should use
## a wwid line. Since there is no guarantee that a specific device will
## not change names on reboot (from /dev/sda to /dev/sdb for example)
## devnode lines are not recommended for blacklisting specific devices.
##
#blacklist {
# wwid 26353900f02796769
# devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
# devnode "^hd[a-z]"
# devnode "^hd[a-z][[0-9]*]"
# devnode "^vd[a-z]"
# devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
#
#}
#multipaths {
# multipath {
# wwid 3600508b4000156d700012000000b0000
# alias yellow
# path_grouping_policy multibus
# path_checker readsector0
# path_selector "round-robin 0"
# failback manual # rr_weight priorities # no_path_retry 5
# }
# multipath {
# wwid 1DEC_____321816758474
# alias red
# }
#}
devices {
device {
vendor "IBM"
product "2107900"
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
features "1 queue_if_no_path"
hardware_handler "0"
path_grouping_policy multibus
rr_weight uniform
rr_min_io 1000
path_checker tur
}
}
