LUN size limitation ?

[galenr]

I had thought that the Hp 9000 lun size limitations were 1MB to the remaining available space on the array.

We have created some LUNs for use by our server. The LUNs of interest
are 2 @ 1.6 TB LUNs.

The problem basically boils down to a HP server seeing our
1.6TB LUNs as ~3.5 TB, which would be nice _ but is not the case. I have
attached the LUNs to another HP server with the same results. With the
smaller LUNs (sizes of ~52 & 72 GB), they do not have any problems. They
attach & display their size correctly to our HP 9000 servers.
So it is not that we are reading 512 as opposed to 1024 because the problem does not occur using smaller LUNS.

Can anyone shed some light please ?

[A. Clay Stephenson]

Hi:

It depends upons the OS version. What version OS are you running and is it 32-bit or 64-bit (if 11x)?

[galenr]

Hello-
Good afternoon and thank you for your prompt response. The system is running 11.11 and 32-bit. Lemmeknow should you need further data.

[Sanjay_6]

Hi Galen,

The maximum addressable file system size on 32 bit 11i is 1TB. So it seems, your system cannot see the LUN size greater than 1TB,

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90742/B2355-90742_top.html&con=/hpux/onlinedocs/B2355-90742/00/00/16-con.html&toc=/hpux/onlinedocs/B2355-90742/00/00/16-toc.html&searchterms=file%20size&queryid=20020225-121619

Hope this helps.

regds

[A. Clay Stephenson]

I don't have a 32-bit 11x box with that much disk to test this on, but what appears to be happening is that your 1.6TB signed value is being treated as an unsigned value which would make it appear to be 3.52TB. You basically have an integer overflow in a 32-bit environment.