topic Re: Online Lun Resize in Disk Enclosures

Online Lun Resize

Ivajlo Yanakiev — Tue, 08 Feb 2005 04:12:10 GMT

Hi all,
I have one LUN 200 gb.
I use this LUN for RAW access.
I can extend this LUN to 400 GB using EVA Cotnroler.
What will see kernel for new LUN.

Re: Online Lun Resize

Uwe Zessin — Tue, 08 Feb 2005 04:38:22 GMT

Very likely, the system will not see the increased size, because, as far as I know, the EVA does not signal a size change to the host.

You don't say what operating system you are using, but the safest way would be to reboot the system during which it will make a new inquiry.

Then it depends on your software if and how you can make use of the increased size. Hopefuly, this will not make any existing data unavailable...

Re: Online Lun Resize

Ivajlo Yanakiev — Tue, 08 Feb 2005 04:49:09 GMT

I use HPUX 11.11 nad Eva storage.

Is there any offical docs I want ot read more about this ?

Reboot isn't option for me :(

Re: Online Lun Resize

Uwe Zessin — Tue, 08 Feb 2005 05:39:36 GMT

I am not aware of any documentation how to treat raw volumes (is this for databases?), but have you already tried an IOSCAN?

Re: Online Lun Resize

Ivajlo Yanakiev — Tue, 08 Feb 2005 06:35:09 GMT

I can not try this :(
Server is production and I must know what I can expect !

Re: Online Lun Resize

Luk Vandenbussche — Tue, 08 Feb 2005 09:53:27 GMT

Hi,

You can use the Lun of 200 GB for raw access
You can not extend a LUN under HPUX.
Solution : create an extra LUN of 200 GB and add it to your volumegroup.

Lun's can be added online to hpux.
Use the follownig command's after the presentation of the LUN

ioscan -fnC disk
insf -e
ioscan -funC disk (to see the device file)

Re: Online Lun Resize

Ivajlo Yanakiev — Wed, 09 Feb 2005 03:27:56 GMT

I do not want to use VG
A want to use raw disk device file
like

/dev/rdsk/c28t0d0

I'm not sure that HPUX kernel do not see new size I find in forum that this isn't support but work !!
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=362426

but i realy need some offcial docs