topic Re: DS2300 and A400-44 LUN config in Operating System - HP-UX

DS2300 and A400-44 LUN config

Susan Prosser — Wed, 01 Sep 2004 06:57:40 GMT

Installed 2 * 11.11 on A classes. Has a DS2300 connected from both A classes. I want to startup the array and create 6 * LUNs such that Service Guard can mount and unmount 6 volume groups.

Please can anyone tell me what daemons etc I need to startup in order to do the above???

Ioscan does show me that I can see the disks. Sam will let me configure them on a one volume per physical disc way.

ioscan from Server A ==

disk 3 0/4/0/0/4/0.0.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c4t0d0 /dev/rdsk/c4t0d0
disk 4 0/4/0/0/4/0.1.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c4t1d0 /dev/rdsk/c4t1d0
disk 5 0/4/0/0/4/1.0.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c5t0d0 /dev/rdsk/c5t0d0
disk 6 0/4/0/0/4/1.1.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c5t1d0 /dev/rdsk/c5t1d0

Ioscan from server B ==

disk 3 0/4/0/0/4/0.0.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c4t0d0 /dev/rdsk/c4t0d0
disk 4 0/4/0/0/4/0.1.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c4t1d0 /dev/rdsk/c4t1d0
disk 5 0/4/0/0/4/1.0.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c5t0d0 /dev/rdsk/c5t0d0
disk 6 0/4/0/0/4/1.1.0 sdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/dsk/c5t1d0 /dev/rdsk/c5t1d0

Any help would be appreciated.

Thanks in advance

Re: DS2300 and A400-44 LUN config

Slawomir Gora — Wed, 01 Sep 2004 07:28:39 GMT

Hi,

DS2300 this is JBOD not array. You can
configure only Volume Groups not LUN-s.
If you want to do this you must create on
server A six vg's , and import vg configuration on serwer B.

Re: DS2300 and A400-44 LUN config

Victor Fridyev — Wed, 01 Sep 2004 07:41:07 GMT

Hi Kevin,

I'm glad to meet you here. I fully agree with the previous message. (No point please)

Victor

Re: DS2300 and A400-44 LUN config

Patrick Wallek — Wed, 01 Sep 2004 08:11:31 GMT

You can create one up to 4 VGs, with one or more LV's in that DS2300. As said above the DS2300 is a JBOD (Just a bunch of disks) and NOT an array. The DS2300 has no smarts built-in (like array controllers).

Each disk can be a VG (only 1 VG per disk for a total of 4 VGs), or all 4 disks can be in the same VG. If you have all disks in a single VG then you can create 6 LVs in that VG to kind of simulate the 6 LUNs that you need.

Re: DS2300 and A400-44 LUN config

Christian Schulze — Fri, 03 Sep 2004 09:01:44 GMT

Hi Kevin,

I agree with all above.

Be sure to run the DS2300 in Full-bus mode (Only with Full-bus mode both Servers can see all of your 13 Disks)
When doing this, you have to change the SCSI-ID on the HBA of one Server.
You can not use Slot number 6 in this case.

If you miss this, everything will look alright, until you put data onto yout shared disks ...

Christian

Re: DS2300 and A400-44 LUN config

Jeff Schussele — Fri, 03 Sep 2004 11:34:00 GMT

Hi Patrick,

You're thinking of the DS2100 which holds only 4 disks.
The DS2300 holds 14 & has split-bus capability and dual I/Fs so it can be used in an MC/SG cluster.
So you could have either max 7 or 14 disks/VGs on it.

Rgds,
Jeff

Re: DS2300 and A400-44 LUN config

Patrick Wallek — Fri, 03 Sep 2004 11:51:43 GMT

Jeff,

I was just going by the ioscan output he showed. He only showed 4 disks in the DS2300, so you can have at most 4 VGs on those 4 disks.

I wasn't looking necessarily at any limits of the DS2300 itself, just what I saw in the post.

Re: DS2300 and A400-44 LUN config

Jeff Schussele — Fri, 03 Sep 2004 12:21:50 GMT

OK - Guess I need more coffee &~00
Been up since *early* doing patch installs.
Gotta love those maint windows......NOT
Didn't even register to me - sorry.
Take care my friend & have a great holiday weekend!

Cheers,
Jeff (No points please)