Seeing a disk on EMC that's JUST been made available

[WSS]

Hi guys,

This is probably an easy one for most of you.

The storage team have just changed the masking, so I am supposed to be able to 'see' some disks on the EMC from the server for the first time, but I can't see them.

What do I need to run to be able to see these newly presented disks?

I tried 'insf -e' but without luck.
Your help would be appreciated, and points awarded.

Thanks in advance...

[Arunvijai_4]

Hi WSS,

Have you tried running # ioscan -fnC disk ?

It should be the one what you are looking for ?

-Arun

[LoC_1]

Hi

If they are presented
#ioscan -fnC disk should rescan the bus and you should see them.
Louis

[Muthukumar_5]

what you are getting for,

# ioscan -fnC disk

--
Muthu

[Devender Khatana]

Hi,

Sometimes a reboot is required to see new luns but it should not be the case always. Try ioscan as well before insf for the new devices to be scanned before creating device files by

#ioscan -fnC disk
#insf

HTH,
Devender

[Peter Godron]

All,
before answering, please read posters previous question.
Suggesions were to do an ioscan, but without success. Reboot was advised.

[WSS]

Yes of course I have tried an ioscan to see if the disks are available, but they are not yet available to see ....

What I was looking for was a command, to allow these disks to be seen by an ioscan...

Thanks in advance

[Muthukumar_5]

Are the DISK are in CLAIMED state. Check out it. May be you have to reboot (init 6) after that check with ioscan -fnC disk and find CLAIMED state.

--
Muthu

[Muthukumar_5]

Yes. That is it. shutdown your machine. Check the physical connectivity and reboot it again. You can able to see the DISKS. Else it is not connected or assigned properly to your machine.

Example:

disk 48 0/6/1/0.97.5.19.1.3.5 sdisk CLAIMED DEVICE EMC
xxxx /dev/dsk/c9t3d5 /dev/rdsk/c9t3d5

--
Muthu

[Arunvijai_4]

Hello,

A reboot should require to see the disks..

-Arun

[Devender Khatana]

Hi,

Ensure that you have not used u option with ioscan. If still you can not see the luns than reboot is the option left.

HTH,
Devender

[Arunvijai_4]

Hello,

Check thse threads for more information

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=984903
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=692550

-Arun

[Ajitkumar Rane]

WSS,

Try "syminq" to check if you can see the new disks. Since you have already tried the insf -e cammond and you still dont see the disk, I doubt they are properly assigned to the server. If the system can see the disk insf -e should simpy add the new device files without a reboot.

Goodluck,

Ajit

[Chan 007]

WSS,

What is the array that you are using,
if you are using a Clariion Array, then I recon you stop and start the Naviagent on your server.

Also can you post your IOSCAN output so that members can provide a more advice.

Chan

[WSS]

As the title suggests, I am using an EMC array. EMC Symetrix.

How is posting the ioscan output going to benefit anyone? I can't see the disks, so you're not going to be able too... Plus without knowing what disks we could see prior to the disks being 'made available' you're not going to know what to look for.

I will be trying a reboot tonight to see if the disks become available, so will know more then.

Thanks all for your replies....

[Mark Greene_1]

Is there a fibre switch between the Symmetrix and the HP box, and were any changes made there recently?

Otherwise, try fcmsutil /dev/td1 stat (with the device appropriate to your system). See the man page for fcmsutil for more options.

mark

[Geoff Wild]

Are the EMC tools installed?

EMC commands should be in:

/usr/symcli/bin


Run a /usr/symcli/bin/syminq

You might have to run a:

symcfg discover

ioscan -fnC disk
insf -eC disk


If storage team does their job, they should do this all for you - and send you an email with the new devs.

Rgds...Geoff

[Stuart Abramson]

If your SAN Team knows what they are doing, and if your HP-UX is built well, stable, etc, you shouldn't have to reboot.

Do you have "symcli" installed (EMC Solutions Enabler)?

Do you have PowerPath installed?

Here is the sequence that I go through to discover new volumes:

# symcfg discover
# symmask refresh
# ioscan -fnCdisk
# insf -eCdisk
#symcfg discover
# powermt restore
# powermt check
# powermt config
# powermt save
# powermt display dev=all

You can see the new volumes by the DATE field on the device file:

ll -nt /dev/dsk

[Edgar Matzinger]

Hi WSS,

if you've ran ioscan -fnC disk and you still do not see the EMC LUNs (as disks), then the SAN-zoning is NOT updated/adjusted.

Check with the SAN guys, cu l8r, Edgar.

[Seth Clarke]

Here's what I do for an XP512

ioscan
ioscan -funC disk
insf -e
xpinfo -m
xpinfo -i

Does EMC provide utilities? I'd also check the SAN switches though their GUI

[Seth Clarke]

Also, check the cables, you can do this by getting a small flash light, shooting through one side of the cable and have someone else sit at the other side to see if the light is visible, Or you can just replace the cables to the switch and the switch to the disk