topic Re: issue in Operating System - HP-UX

issue

Claudius Kawaletz_1 — Mon, 26 Feb 2007 05:55:32 GMT

Hi All,

we have a little issue with my smartarray.
we have a rp3410 with a MSA30. this one was configured with 4 hdd's (raid 1+0). now we bought 4 more hdd's and i wanted to extend the logical volume.

when i'm running saconfig /dev/cissX i see that i can add more spare drives (i did that) now i do see the hdd's as participating spare drives.

But how can i bring them into the logical volume ?? do i have to delete the existing one and create a new one (would be kinda awfull) ??

Thanks for any help/ hints... :)

Claudius

Re: issue

Piergiacomo Perini — Mon, 26 Feb 2007 06:28:08 GMT

Hi Claudius,
as far as i known you have to add pv to volume group that already exist (with comand "vgextend"); then you can extend logical volume according to 0+1 raid structure you have.

hth
regards
pg

Re: issue

Claudius Kawaletz_1 — Mon, 26 Feb 2007 06:55:34 GMT

Hi Piergiacomo,

yes thats right.
My problem is, that the new hdd's should be included in the logical volume (this should be done somehow with the saconfig command). I did add the hdd's as spare drives and now i want to add theses drives as permanent drives into the logical volume.

Regards,
Claudius

Re: issue

Wouter Jagers — Mon, 26 Feb 2007 07:15:36 GMT

Indeed, that's usually what we want the least ;-)

However, I wouldn't think a 1+0 hardware-raid volume could be 'grown' just like that, without re-creating :/
(I'm not a SmartArray guru, though)

A way around could be to just create a second 1+0 raid volume on the array, so your operating system would be presented a 'new disk' similar to the existing one.

Then you could pvcreate this 'new disk', add it to the volume group and extend your logical volume with this new space.

Let us know what you find.. good luck !

Cheers,
Wout

Re: issue

Claudius Kawaletz_1 — Mon, 26 Feb 2007 08:35:55 GMT

Hi Wout,

this is a pretty good idea, i will do that.

But there is an option to extend the array with physical devices (i have found this here http://www.docs.hp.com/en/J6369-90036/J6369-90036.pdf
) but how it looks like my 'saconfig' seems to be too old... version A.01.15.
So i'm going to look if i find a newer version.

But thanks for this workaround.... :)

Regards,
Claudius

Re: issue

Wouter Jagers — Mon, 26 Feb 2007 10:21:39 GMT

No problem at all :-)

And you're right, the document you linked does talk about 'saconfig /dev/ciss5 -E 0 -p 2:4 -p 2:5' (to add physical devices) and 'saconfig /dev/ciss5 -E 0 -c 15' (to extend the logical drive). Thanks for pointing that out :-)

Pity that doesn't work on your box, maybe worth logging a call at HP for ?

Cheers

Re: issue

Torsten. — Mon, 26 Feb 2007 12:30:59 GMT

Hi,

do not extend the logical drive unless you want to re-create your VG configuration.

Up to HP-UX 11i v2 the OS is not able to handle an increased LUN size.
The size will remain the same from LVM point of view.

This is changed in 11.31.

I would recommend to create a new logical drive and add this to your VG.