359645-B21 (HP MSA30 4PORT HPUX /IA64 Linux JBO Encl)

[Ramesh.K.R.]

Hi Experts,

Can use "sautil" to configure this disk array ??
OR What is the best method to be used for configuring this disk array (creating VG's, LV's)

Thanks & Regards,
Ramesh

[Ramesh.K.R.]

Some more info...

I am using "ia64 hp server rx2620" (Itanium) and HPUX 11.23.

Ramesh

[Uwe Zessin]

The MSA30 is just a disk drive enclosure with no embedded RAID controller. You need to find out if it is connected to a simple SCSI HBA or a SmartArray controller in your server.

[Torsten.]

Hi,

it depends. If the enclosure is connected to a "simple" SCSI controller, you can configure every single disk as a single device.
If you have the enclosure connected to a smartarray controller, you have to use "sautil".
An "ioscan" will tell you the details.
A smart array looks like this:

ext_bus 4 0/2/1/0/4/0 ciss CLAIMED INTERFACE PCI-X SmartArray 6402 RAID Controller

[Ramesh.K.R.]

Hi,

What i have is not just MSA30, but The muli-initiator (MI) model 359645-B21.
But, i don,t have the Smart Array Controller. The MSA30 is connected to normal SCSI (Ultra320) card.
So, i have only the manulal option for creating PV / VG / LV ??

Regards,
Ramesh

[Torsten.]

The use of the MI interface is, that you can connect 2 servers (or at least 2 controllers) to each half of the MSA30.
Because of this you must set the controller ID of 1 of the controllers (HBA) from 7 so 6.

What your server can see is every single disk in the MSA (ioscan -fn). Now use pvcreate, vgcreate ... or just SAM to configure the disk.

[Ramesh.K.R.]

Hi Torsten,

Is it a must to change the HBA SCSI ID's even if i am connectying 2 stand alone servers to the MSA ??
I thought this is required only when the MSA is used in a cluster...
Pl clarify.

NOTE: Currently i have connected 2 servers to the MSA w/o changing the HBA SCSI ID. But, i can see only 7 disks each(unique), in different servers. i.e. i can see only the disks connected to bus A in one server & the other server sees only the disks connected to bus B of MSA.

Regards,
Ramesh

[Torsten.]

The MI module has 4 connectors (A1,A2, B1,B2). The A connectors are connected to the bus A, the same for B.

If you connect 1 server to A1 and 1 server to A2, you MUST reconfigure one of the HBAs from 7 to 6 - otherwise you have a scsi id conflict.

[Ramesh.K.R.]

So, it is not required to change the SCSI ID, if i have connected one server to A bus (A1 or A2) and the other server to B bus (B1 or B2), right ??

Also, if i want to use MSA in cluster, what should be the connection like ??
(i.e. server1 to A1, server2 to A2 ?? OR server1 to A1, server2 to B1 & A2 cross connected to B2 ??)

Regards,
Ramesh.K.R.

[Torsten.]

"So, it is not required to change the SCSI ID, if i have connected one server to A bus (A1 or A2) and the other server to B bus (B1 or B2), right ??"

YES!

The sense of the cluster connection is to enable both servers to access the *same* disks.

Thatswhy you need to connect server 1 to A1, server 2 to A2 (the same for B) and adjust the SCSI ID for 1 server. I would set both controllers to 6 for one server.
Depending on your server model you may do this using "mptutil".