[CentOS] multipath troubleshoot

Paras pradhan pradhanparas at gmail.com
Tue Sep 21 13:23:20 EDT 2010


Reboot in to the latest kernel fixed this issue.

Paras.

On Fri, Sep 17, 2010 at 1:19 PM, Paras pradhan <pradhanparas at gmail.com> wrote:
> 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.
>


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