narkive

unknown

1970-01-01 00:00:00 UTC

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<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">Colin</font=

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">OK =96 I see you a=
re using enclosure
naming =96 and BTW =96 the /dev/vx/dmp /dev/vx/dmp are just the same as
disks BUT with the added provision of DMP to keep the device online.=


<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">How many paths to =
these devices

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm getsubp=
aths 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">or</=
p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdisk path</spa=
n>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">If a CLARiiON , an=
d if only 2 paths =96
then set the array iopolicy to singleactive =96 this is most likely =96
see later for DMP 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm listenc=
losure all

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm setattr=
enclosure ENC_name
iopolicy=3Dsingleactive

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">If a CLARiiON , an=
d if more than 2 paths =96
then set the array iopolicy to balanced =96 and DMP does know how to stop
IO to the secondary paths.=A0 Note =96 this is against EMC recommendations
but it works.

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm listenc=
losure all

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm setattr=
enclosure ENC_name
iopolicy=3Dbalanced

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">I also notice that=
the enclosure names are
lower case =96 indicating a V5.x release VxVM installed. =96 are the
CLARiiON APMs running ?

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm listapm=
all 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">Check the CLARiiON=
are Active

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">If a fencing clust=
er =96 then these
are local LUNs at the point of /dev/vx/dmp names for the devices. And yes S=
CSI3
keys will be placed on them in a fencing cluster 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># gabconfig =96a</=
span>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">Check if there is =
Port b membership =96
if so then yes you have a fencing cluster.

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">Check also the DMP=
block switch =96 it
may be that with the iopolicy incorrect, and on low IO you did not reach th=
e limit
for 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy"># vxdmpadm gettune=
all 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">dmp_pathswitch_blk=
s_shift=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">Now =96 when busy =
and IO chunks bigger
than path switch level ( and with iopolicy incorrect ) a path switch will c=
ause
a trespass (check SAN logs) =A0AND a block, drain, resume on the DMP path. =
There
will be a failover message logged in /etc/vx/dmpevents.log =96 check here
also.

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">Stuart</fon=
t>

<span=
style=3D"font-size:10.0pt;font-family:Arial;color:navy">=A0<=
/p>

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size=3D"3" face=3D"Times New Roman">

<hr size=3D"2" width=3D"100%" align=3D"center">

</div>

From:</b=

<span style=3D"font-size:10.0pt;font-fami=

ly:Tahoma">
<a href=3D"mailto:veritas-vx-***@mailman.eng.auburn.edu" target=3D"_bla=
nk">veritas-vx-***@mailman.eng.auburn.edu</a>
[mailto:<a href=3D"mailto:veritas-vx-***@mailman.eng.auburn.edu" target=
=3D"_blank">veritas-vx-***@mailman.eng.auburn.edu</a>] On Behalf Of Collin 
Sent: Wednesday, 31 March 20=
10 2:09
AM 
To: William Havey 
Cc:
<a href=3D"mailto:veritas-***@mailman.eng.auburn.edu" target=3D"_blank">veri=
tas-***@mailman.eng.auburn.edu</a> 
Subject: Re: [Veritas-vx] Vx=
Vm

</div><div><div class=3D"h5">

=A0

Sorry for any
confusion... 
 
I've got several powerpath devices from a dead system that I'm moun=
ting
temporarily on one node in my cluster.=A0 I run a devfsadm -Cv and vxdctl
enable.=A0 After that I can see the powerpath devices listed as... 
 
emc_clarrion0_10=A0 auto:none=A0=A0=A0=A0=A0=A0=A0=A0
-=A0=A0=A0=A0=A0=A0=A0=A0=A0 -=A0=A0=A0
online invalid 
 
I modified my /etc/vfstab file to mount the devices.. 
 
/dev/vx/dmp/emc_clariion0_10s6=A0=A0
/dev/vx/rdmp/emc_clariion0_10s6=A0=A0 /u10=A0=A0 ufs=A0=A0 3
yes - 
 
The device mounts and I can access the file system with all my data.=A0 Whe=
n
the activity starts to increase on these temporary mount points, I see a co=
unt
down on the console that port H has lost connectivity. After the 16 seconds=
,
the node panics and of course reboots.=A0 However, if I mount the power pat=
h
devices using a single path.. 
 
/dev/dsk/c1t5006016100600432d10s6=A0
/dev/rdsk/c1t5006016100600432d10s6=A0 /u10=A0 ufs 3 yes - 
 
I never get the port H losing connectivity. 
 
I want to use the dmp name in case I lose a path to these disk. 
 
Any reason why using the dmp name causes port H to lose connectivity vs. us=
ing
a single path? 
 
Thanks, 
Collin

<div>

On Tue, Mar 30, 2010 at 10:48 AM, William Havey <=

> wrote:

The original message states "mount these disks =
as
/dev/vx/dmp/<emc_array>_Xs6 ". Perhaps this is normal behavior.
Mounts are of devices which receive I/O. A "/dev/vx/dmp/..." devi=
ce
entry isn't I/O capable. 
 
I think a clearer statement of what Collin intends to do is needed. 
 
Bill

<div>

<div>

=A0

<div>

On Tue, Mar 30, 2010 at 3:01 AM, Dmitry Glushenok &l=

> wrote:

Hello, 
 
Panic string and previous messages usually helps to understand cause.. Rele=
ase
notes to RP2-RP3 also provides short descriptions of fixed issues like
"Fixed the cause of a system panic when mutex_panic() was called from
vol_rwsleep_wrlock()."

<div>

 
On 29.03.2010, at 19:02, Collin wrote: 
 
> I've got the following.... 
> 
> =A0 =A0 Solaris 10 
> =A0 =A0 VxVM 5.0MP3RP1HF12 
>

</div>

> I have a number of mount points that are being =
migrated from
/dev/dsk/cXtXdXsX to clustered mount points. =A0The problem I'm having =
is if
I mount these disk in the /dev/dsk/cXtXdXsX format I run the risk that if
something were to cause the direct path to go down I would lose the databas=
es
on these mount points. =A0But when I mount these disks as
/dev/vx/dmp/<emc_array>_Xs6 my system panics and core dumps.</=
font>

<div>

> 
> Does VxVM have any issues mounting /dev/vx/dmp/<emc_array>_Xs6??=
 
> 
> Thanks, 
> Collin 
> _______________________________________________ 
> Veritas-vx maillist =A0- =A0<a href=3D"mailto:Veritas-***@mailman.eng.a=
uburn.edu" target=3D"_blank">Veritas-***@mailman.eng.auburn.edu</a> 
> <a href=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx" =
target=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx=
</a>

</div>

-- 
Dmitry Glushenok 
Jet Infosystems

<div>

<div>

 
_______________________________________________ 
Veritas-vx maillist =A0- =A0<a href=3D"mailto:Veritas-***@mailman.eng.auburn=
.edu" target=3D"_blank">Veritas-***@mailman.eng.auburn.edu</a> 
<a href=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx" targe=
t=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx</a><=
/span>

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</div>

</div>

=A0

</div>

</div>

</div>

=A0

</div></div></div>

</div>

 _______________________________________________ 
Veritas-vx maillist =A0- =A0<a href=3D"mailto:Veritas-***@mailman.eng.auburn=
.edu">Veritas-***@mailman.eng.auburn.edu</a> 
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br>
 </blockquote></div> -- sengork 

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