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Issue redhat 5.5 + VN5300 + Qlogic + fstab + multipath
hi, guys thanks for time and help i have strange issue on my server
setup:
Server Dell PowerEdge 2950
32GB RAM
2 x Qlogic 8GB Fiber Channel
VNX5300
i have fstab for map partition to folder
when i reset the server some times the map lost
first reboot
/dev/dm-2 194G 59G 125G 33% /u01
/dev/dm-3 194G 59G 125G 33% /u02
/dev/dm-4 194G 20G 164G 11% /u03
/dev/dm-5 194G 16G 168G 9% /u04
/dev/dm-6 194G 26G 159G 14% /u05
/dev/dm-7 194G 188M 184G 1% /u06 -> change(lost map) say no data is not true
/dev/dm-9 194G 11G 174G 6% /u07
/dev/dm-10 194G 15G 169G 9% /u08
/dev/dm-11 194G 15G 169G 9% /u09
/dev/dm-12 194G 10G 174G 6% /u10
/dev/dm-13 194G 10G 174G 6% /a10
/dev/dm-14 194G 10G 174G 6% /u33
second reboot
/dev/dm-2 194G 11G 174G 6% /u01
/dev/dm-3 194G 15G 169G 9% /u02
/dev/dm-4 194G 15G 169G 9% /u03
/dev/dm-5 194G 10G 174G 6% /u04
/dev/dm-6 194G 10G 174G 6% /u05
/dev/dm-7 194G 10G 174G 6% /u06 -> normal real whit data true
/dev/dm-9 194G 59G 125G 33% /u07
/dev/dm-10 194G 59G 125G 33% /u08
/dev/dm-11 194G 20G 164G 11% /u09
/dev/dm-12 194G 16G 168G 9% /u10
/dev/dm-13 194G 26G 159G 14% /a10
/dev/dm-14 194G 188M 184G 1% /u33
mpath4 (3600601603ba02e00ecc5da9bd4b9e211) dm-1 DGC,VRAID
[size=1.2T][features=1 queue_if_no_path][hwhandler=1 emc][rw]
\_ round-robin 0 [prio=1][active]
\_ 2:0:0:1 sdf 8:80 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:0:1 sdd 8:48 [active][ready]
mpath3 (3600601603ba02e00925b296cd4b9e211) dm-0 DGC,VRAID
[size=1.3T][features=1 queue_if_no_path][hwhandler=1 emc][rw]
\_ round-robin 0 [prio=1][active]
\_ 2:0:0:0 sde 8:64 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:0:0 sdc 8:32 [active][ready]
what i have to check?
umichklewis
1.2K Posts
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May 21st, 2013 13:00
From this message, I'm guessing you're not using PowerPath. Can you print the output from lsscsci -v?
Can you cat your /etc/multipath.conf file as well?
argj
22 Posts
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May 23rd, 2013 21:00
Multipath configuration:
blacklist {
#devnode "*"
wwid 36001e4f037a89c00190845d646f20f32 #Internal Disk DELL Raid5
wwid 36001e4f037a89c00190c0fda0718ffff #Internal Disk DELL Raid5
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
}
defaults {
multipath_tool "/sbin/multipath -v0"
udev_dir /dev
polling_interval 5
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 128
rr_weight uniform
failback immediate
no_path_retry fail
user_friendly_names no
}
multipaths {
multipath {
wwid 3600601603ba02e00f0d3a1878fc1e211
alias ORA_LUN_02
}
multipath {
wwid 3600601603ba02e0060c35b788fc1e211
alias ORA_LUN_01
}
multipath {
wwid 3600601603ba02e005acb2b2216c4e211
alias ORA_REDO
}
multipath {
wwid 3600601603ba02e008e9c793316c4e211
alias ORA_ARCH
}
}
Next use /dev/mapper for load fstab
fdisk /dev/mapper/ORA_LUN_02
run the kpartx command to list the partititon mappings
kpartx -l /dev/mapper/ORA_LUN_02
ORA_LUN_01p5 : 0 400018374 /dev/mapper/ORA_LUN_01 126
ORA_LUN_01p6 : 0 400018437 /dev/mapper/ORA_LUN_01 400018563
ORA_LUN_01p7 : 0 400018437 /dev/mapper/ORA_LUN_01 800037063
ORA_LUN_01p8 : 0 400018437 /dev/mapper/ORA_LUN_01 1200055563
ORA_LUN_01p9 : 0 400018437 /dev/mapper/ORA_LUN_01 1600074063
ORA_LUN_01p10 : 0 400018437 /dev/mapper/ORA_LUN_01 2000092563
ORA_LUN_01p11 : 0 232749657 /dev/mapper/ORA_LUN_01 2400111063.
kpartx command to create that partition mappings
kpartx -a /dev/mapper/ORA_LUN_02
mke2fs -j /dev/mapper/ORA_LUN_01p5
fstab:
/dev/mapper/ORA_LUN_02p5 /u07 ext3 defaults 1 2
argj
22 Posts
0
May 23rd, 2013 21:00
Karl, thanks for your time and help all ready SOLVED my problem using multipath
dynamox
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20.4K Posts
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May 23rd, 2013 21:00
what was the resolution ?
argj
22 Posts
0
May 24th, 2013 06:00
yes is working fast!!!!! and greate!!!!
dynamox
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May 24th, 2013 06:00
using this approach device names stay persistent between reboots ? Thank you for sharing your configuration.