Re: The logical disk not on preferred path...Fast700 & AIX
From: sasa queer (sasa1973pk_at_yahoo.com)
Date: 04/27/04
- Next message: Ulli: "USV Check Tool"
- Previous message: Friedl: "sysLocation info in /etc/snmpd.conf is not visible"
- Maybe in reply to: sasa queer: "The logical disk not on preferred path...Fast700 & AIX"
- Next in thread: sasa queer: "Re: The logical disk not on preferred path...Fast700 & AIX"
- Reply: sasa queer: "Re: The logical disk not on preferred path...Fast700 & AIX"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Date: 26 Apr 2004 23:17:27 -0700
Sorry Tom .
I really appreciate ur help and with ur answer realizing that i have
infact given really less information to go along.
1)
Yes i am using two SAN switches. However they are not intermixed to
form a single Fabric.
The cabling is done in this way that cables from each FC card ends
into seprate san switches.Zoning is done on each SAN Switch in this
way that each card should see seprate controllers on FAST Subsystem.
There are two FC on each AIX host.
One zone is also made to access tape drive. So one FC card's port on
switch is duplicated in two zone ( i.e CTLR-B Zone and Tapedrive
Zone).
2)The errors appearing on AIX host are saying " Array Controller
Switch " and "Array Configuration changed". I will post exact labels
in my next post but you are right that every time there is an error in
AIX error log which indicates that there are some event occur at FAST
subsystem level.
And i am very much thankfull to you if you help me in pointing to
error which is present in SAN Configuration.
In addition to this i want to ask some basic questions:
1) Can the Lun be accessed through two FC adapters per AIX host .I
think that it should be supported as there is RDAC driver present on
AIX.
2) can a LUN be shared between two AIX hosts without using HACMP. I
mean using manual varyonvg and varyoffvg commands?
Thanks in advance !
SASA
Tom Hoffmann <trh411@earthlink.net> wrote in message news:<pan.2004.04.25.03.12.53.514695@earthlink.net>...
> On Mon, 19 Apr 2004 09:09:40 -0700, sasa queer wrote:
>
> > Dears,
> > I have been captured in a strange situation. I have a number of P630
> > servers connect to a fast700 subsystem . one of the p630 have Stoirage
> > manager 8.3 installed and managing subsystem through direct management
> > technique ( no Sm agent working). Now the problem is that very
> > frequently " logical disk not on preferred path" error appearing on
> > subsysyem level and on AIX level the varyonvg commands hang and
> > filesystems hang up occur.
> >
> > A lot of fcs-array errors also appear in aix system log. AIX 5.2 Ml01
> > and fast manager 8.3.
> > can any body help me ?
>
> Well, you certainly have not given much to go on. SAN configurations can
> get very complex. Troubleshooting a SAN without any facts about how it is
> configured is impossible. Here are some questions:
>
> 1) Are you using a switched fabric to connect the hosts to the 700? If so,
> how many switches are in your configuration? How have you configured the
> zones on your fabric switches relative to the controllers on the 700? 2)
> How many FC adapters are in each host? Did you zone each adapter to a
> separate 700 controller?
> 4) What are the errors you are getting in the error log? I can make an
> assumption that they are FCP_ARRAY_ERROR messages, but why don't you
> provide the messages?
>
> BTW, in my experience, FCP Array errors are almost always the result of a
> mis-configured SAN.
- Next message: Ulli: "USV Check Tool"
- Previous message: Friedl: "sysLocation info in /etc/snmpd.conf is not visible"
- Maybe in reply to: sasa queer: "The logical disk not on preferred path...Fast700 & AIX"
- Next in thread: sasa queer: "Re: The logical disk not on preferred path...Fast700 & AIX"
- Reply: sasa queer: "Re: The logical disk not on preferred path...Fast700 & AIX"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
