Hi all, just a curiosity..

With few information about the architecture :

Solaris 8
SAN HDS 9980
Veritas VM 3.5

And i have this data (an example on disk)

vxdisk list <DISK>
bla bla bla
................
Multipathing information:
numpaths: 2
c2t50060E8003EABB00d4s2 state=enabled
c5t50060E8003EABB10d4s2 state=enabled

I can't see primary or secondary on controllers, and with a fast check
with iostat :

(second path)

0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 0 0
c5t50060E8003EABB10d4
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
c5t50060E8003EABB10d4
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
c5t50060E8003EABB10d4

(first path)

0.0 1.0 0.0 8.2 0.0 0.0 0.0 0.8 0 0
c2t50060E8003EABB00d4
0.0 1.0 0.0 7.3 0.0 0.0 0.0 0.6 0 0
c2t50060E8003EABB00d4
0.0 3.0 0.0 24.0 0.0 0.0 0.0 0.6 0 0
c2t50060E8003EABB00d4

Now, can i suppose in a A/P configuration??? Can i check A/A or A/P on
controllers??

In my mind i remember an option with vxdmpadm for getattr with iopolicy,
maybe in VM > 4.0 version..

Thanks

On 2005-03-08 18:38:47 -0500, DaviS°
<davissivad@toglilospecchiodavisnet.it> said:

> Hi all, just a curiosity..
>
> With few information about the architecture :
>
> Solaris 8
> SAN HDS 9980
> Veritas VM 3.5
>
> And i have this data (an example on disk)
>
> vxdisk list <DISK>
> bla bla bla
> ...............
> Multipathing information:
> numpaths: 2
> c2t50060E8003EABB00d4s2 state=enabled
> c5t50060E8003EABB10d4s2 state=enabled
>
> I can't see primary or secondary on controllers, and with a fast check
> with iostat :
>
> (second path)
>
> 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 0 0
> c5t50060E8003EABB10d4
> 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
> c5t50060E8003EABB10d4
> 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
> c5t50060E8003EABB10d4
>
> (first path)
>
> 0.0 1.0 0.0 8.2 0.0 0.0 0.0 0.8 0 0
> c2t50060E8003EABB00d4
> 0.0 1.0 0.0 7.3 0.0 0.0 0.0 0.6 0 0
> c2t50060E8003EABB00d4
> 0.0 3.0 0.0 24.0 0.0 0.0 0.0 0.6 0 0
> c2t50060E8003EABB00d4
>
> Now, can i suppose in a A/P configuration??? Can i check A/A or A/P on
> controllers??
>
> In my mind i remember an option with vxdmpadm for getattr with
> iopolicy, maybe in VM > 4.0 version..
>
> Thanks

You can use "vxdisk path" to verify that all LUN's have two paths to each disk.
"vxdmpadm listctrl all" can be usefull in your case you should see
HDS9980V with two controller names.

Not sure why you dont want to do A/A sinse you mention your using an
9980 you can enable A/A by issuing the following
"vxdmpadm setattr arraytype A/A iopolicy=round-robin"

--
Unix Systems Engineer
The City of New York (DoITT)
http://www.nyc.gov/doitt
rbrown[(@)]doitt.nyc.gov
http://www.rodrickbrown.com

Rodrick Brown <rbrown[@]doitt.nyc.gov> wrote:
> On 2005-03-08 18:38:47 -0500, DaviS°
> <davissivad@toglilospecchiodavisnet.it> said:

>> Hi all, just a curiosity..

>> numpaths: 2
>> c2t50060E8003EABB00d4s2 state=enabled
>> c5t50060E8003EABB10d4s2 state=enabled

>> c5t50060E8003EABB10d4
>> 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
>> c2t50060E8003EABB00d4
>> 0.0 1.0 0.0 7.3 0.0 0.0 0.0 0.6 0 0

> You can use "vxdisk path" to verify that all LUN's have two paths to each disk.
> "vxdmpadm listctrl all" can be usefull in your case you should see
> HDS9980V with two controller names.

> Not sure why you dont want to do A/A sinse you mention your using an
> 9980 you can enable A/A by issuing the following
> "vxdmpadm setattr arraytype A/A iopolicy=round-robin"

My assumption was that he does want A/A, but is surprised by the
imbalance on the paths reported by iostat.

--
Darren Dunham ddunham@taos.com
Senior Technical Consultant TAOS http://www.taos.com/
Got some Dr Pepper? San Francisco, CA bay area
< This line left intentionally blank to confuse you. >