What I would do is compare the number of paths with the normal count. For example, my "Script to check multipath failures" at http://yong321.freeshell.org/computer/Multipath.html set up as a cron job, alerts me when the number of active paths is below the normal count, 4 in this case. So you establish a baseline first when all active paths are avaialable. ------------------------------ Message: 2 Date: Fri, 28 Feb 2014 20:00:43 +0100 From: emmanuel segura <emi2fast@xxxxxxxxx> To: General Red Hat Linux discussion list <redhat-list@xxxxxxxxxx> Subject: Re: [rhel6] How-to show failed paths with "multipath" Message-ID: <CAE7pJ3CORoQt-JTEac3VMPpEjnGqz0rHFkBW-1D-DPiez7SOWA@xxxxxxxxxxxxxx> Content-Type: text/plain; charset=ISO-8859-1 In the newers Suse 11 and Redhat 6, when a path is los, the dead devices are removed from system, that's what i know 2014-02-28 19:51 GMT+01:00 Nicolas C. <rh@xxxxxxx>: > Hello, > > With RHEL6 on a SAN environment, is it possible to display dead paths with > "multipath" ? > > This is the output of "multipath -ll" a RHEL4 server : > > data (360050768028107fac00000000000009f) > [size=150 GB][features="1 queue_if_no_path"][hwhandler="0"] > \_ round-robin 0 [enabled] > \_ 3:0:0:2 sde 8:64 [failed][faulty] > \_ 4:0:0:2 sdm 8:192 [failed][faulty] > \_ round-robin 0 [prio=20][active] > \_ 3:0:1:2 sdi 8:128 [active][ready] > \_ 4:0:1:2 sdq 65:0 [active][ready] > > We can see failed paths. And this is the output on RHEL6 : > > sata (360050768028107fac0000000000000d0) dm-3 IBM,2145 > size=170G features='1 queue_if_no_path' hwhandler='0' wp=rw > `-+- policy='round-robin 0' prio=10 status=active > |- 4:0:1:1 sdf 8:80 active ready running > `- 3:0:1:1 sdj 8:144 active ready running > > Increasing the verbose level of "multipath" doesn't work (the > "/etc/multipath.conf" file is classic on both systems). > > Thanks, > > Nicolas -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
