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LUN size mismatch

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arkie
Super Advisor

LUN size mismatch

Hi All,

In an EVA 4000, a Vdisk of size 2000 GB has been presented to a particular host. But, at the host end, the displayed size is not at par.

# diskinfo /dev/rdsk/c8t0d1
SCSI describe of /dev/rdsk/c8t0d1:
vendor: HP
product id: HSV200
type: direct access
size: 4244635648 Kbytes
bytes per sector: 512

This works out to approx 3.953125 TB (but desirably, should have been 1.953125 TB).

Why is there this size difference?
12 REPLIES
Torsten.
Acclaimed Contributor
Solution

Re: LUN size mismatch

Strange. Absolutely sure it is the same vdisk?

Hope this helps!
Regards
Torsten.

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arkie
Super Advisor

Re: LUN size mismatch

Yes Torsten,

There is only presented LUN.
TTr
Honored Contributor

Re: LUN size mismatch

I will ask the same question as Torsten. Are you sure you have the right LUN?

It maybe the only LUN in the server but was the right LUN presented from the array? Or are you sure it was created at the array as a 2000GB LUN? Ask the SAN team to verify again.

Do you have the EVA software install on the host? Check the LUN with evainfo.
Torsten.
Acclaimed Contributor

Re: LUN size mismatch

AFAIR for this array 2TB is the maximum LUN size anyway. Strange.

"evainfo" would be interesting.


What is the host OS?

I remember some diskinfo patches years ago.

Hope this helps!
Regards
Torsten.

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singh sanjeev
Trusted Contributor

Re: LUN size mismatch

if you have doubt on diskinfo output ..check in SAM about the size
Sanjeev Singh
Aungshuman Paul
Regular Advisor

Re: LUN size mismatch

What is OS version and Operating environment ( Base, Mission Critical etc. )
arkie
Super Advisor

Re: LUN size mismatch

I would like to come up with all the information at the earliest, but sorry! I have been in another customer site for the last few days.

By the way OS is HP-UX 11iv1 and OE is Base

Will await your responses as always....

Auf Wiedersehen!

S. Ney
Trusted Contributor

Re: LUN size mismatch

Do you have access to HP's business support center? I'd get the evainfo tool for 11v1

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=US&swItem=co-52747-1

If you can download run the evainfo command with -a or -d option.

Also not sure this thread would help you or not:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1307414

Lastly does your syslog or /etc/rc.log show any errors?
TTr
Honored Contributor

Re: LUN size mismatch

> Torsten: I remember some diskinfo patches years ago.

Indeed. From the PHCO_27168 description:

"When diskinfo(1M) is run on a large capacity disk, wrong value is printed for fields "blocks per disk" and "size".

No reboot required, the patch replaces the diskinfo binary.
Torsten.
Acclaimed Contributor

Re: LUN size mismatch

Patch bundles installed?

Run

# swlist

to check.

Hope this helps!
Regards
Torsten.

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There are only 10 types of people in the world -
those who understand binary, and those who don't.

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atul2701
Frequent Advisor

Re: LUN size mismatch

Hi Arkie,

How you came to know that vdisk size is 2TB not 4TB. Stroge team informed you or you checked using LVM commands.

If you have checked disk size using LVM commands it will show 2TB only even actual size is 4TB. Bcoz LVM ver 1.0 is not supporting more than 2TB capacity disks.

atul
Atul Gupta
TTr
Honored Contributor

Re: LUN size mismatch

> atul2701: How you came to know that vdisk size is 2TB not 4TB....

From the very first line at the top of this posting:

"In an EVA 4000, a Vdisk of size 2000 GB has been presented to a particular host."