[CentOS] multipath troubleshoot

Paras pradhan pradhanparas at gmail.com
Fri Sep 17 14:19:31 EDT 2010


Hi,
My storage admin just assigned a Lun (fibre) to my server. Then re scanned using

echo "1" > /sys/class/fc_host/host5/issue_lip

echo "1" > /sys/class/fc_host/host6/issue_lip

I can see the scsi device using dmesg

But mpath device are not created for this LUN


Pleas see below. The last 4 should be active and I think this is the problem

Kernel: 2.6.18-164.11.1.el5xen , EL 5.5
--

[root at cvprd3 lvm]# multipathd -k
multipathd> show paths
hcil        dev dev_t  pri dm_st   chk_st   next_check
5:0:0:0     sdb 8:16   1   [active][ready]  XXX....... 7/20
5:0:0:1     sdc 8:32   1   [active][ready]  XXX....... 7/20
5:0:0:16384 sdd 8:48   1   [active][ready]  XXX....... 7/20
5:0:0:16385 sde 8:64   1   [active][ready]  XXX....... 7/20
5:0:0:32768 sdf 8:80   1   [active][ready]  XXX....... 7/20
5:0:0:32769 sdg 8:96   1   [active][ready]  XXX....... 7/20
5:0:0:49152 sdh 8:112  1   [active][ready]  XXX....... 7/20
5:0:0:49153 sdi 8:128  1   [active][ready]  XXX....... 7/20
5:0:0:2     sdj 8:144  1   [active][ready]  XXX....... 7/20
5:0:0:16386 sdk 8:160  1   [active][ready]  XXX....... 7/20
5:0:0:32770 sdl 8:176  1   [active][ready]  XXX....... 7/20
5:0:0:49154 sdm 8:192  1   [active][ready]  XXX....... 7/20
5:0:0:3     sdn 8:208  1   [active][ready]  XXX....... 7/20
5:0:0:16387 sdo 8:224  1   [active][ready]  XXX....... 7/20
5:0:0:32771 sdp 8:240  1   [active][ready]  XXX....... 7/20
5:0:0:49155 sdq 65:0   1   [active][ready]  XXX....... 7/20
5:0:0:4     sdr 65:16  1   [active][ready]  XXX....... 7/20
5:0:0:16388 sds 65:32  1   [active][ready]  XXX....... 7/20
5:0:0:32772 sdt 65:48  1   [active][ready]  XXX....... 7/20
5:0:0:49156 sdu 65:64  1   [active][ready]  XXX....... 7/20
5:0:0:5     sdv 65:80  0   [undef] [faulty] [orphan]
5:0:0:16389 sdw 65:96  0   [undef] [faulty] [orphan]
5:0:0:32773 sdx 65:112 0   [undef] [faulty] [orphan]
5:0:0:49157 sdy 65:128 0   [undef] [faulty] [orphan]
multipathd>

Thanks in Adv
Paras.


More information about the CentOS mailing list