Description
...
AlphaServer supports up to a 3-nodes shared SCSI cluster for either OpenVMS cluster or TruCluster. That is, up to 3 AlphaServers can be daisy-chained to a set of shared SCSI devices. With Charon-AXP, we do this in a virtual way. The underlining hardware is not limited to KZPBA and HSZ controllers. A virtualized shared SCSI can run on any shared storage, include iSCSI, Fibre Channel, and Charon vdisks. Here we describe how to set up a shared SCSI environment.
Step-by-step guide
...
Requirement
The shared SCSI can be built on a single PC server multiple Charon instances environment, or a multiple PC server environment.
...
Configuration in Charon is done in two parts - the virtual SCSI controller; and the SCSI disks. The sharing is done in the SCSI controller setting.
Configuring the shared SCSI controller
Virtual shared SCSI buses are talked through network using TCP/IP. In Charon configuration, we have to specify the IP address and port (ie. an IP socket) for each virtual SCSI controller, so that other virtual SCSI controllers on the same bus can talk to it.
...
Node C – IP address is 192.168.13.4
Node A, SCSI controller configuration –
- SCSI ids of the emulated SCSI controller are all 7
...
set PKC port[500]=17216 host[500]="192.168.13.4:15217" <== point to node C
:
:
Node B, SCSI controller configuration –
- SCSI ids of the emulated SCSI controller are all 6
...
set PKC port[500]=16215 host[500]="192.168.13.4:15216" <== point to node B
:
:
Node C, SCSI controller configuration –
- SCSI ids of the emulated SCSI controller are all 5
...
A picture will make this easy to understand.
Configuring the storage
In the configuration of single PC server multiple instances, the shared storage can be a locally attached physical drive, from iSCSI, Fibre Channel, and also Charon virtual disks.
...
- All PC servers that participate in the shared SCSI configuration should have the same number of local disk, so that when the external LUN is first presented, all the PC server will start with the same PhysicalDrive number
- Present the external LUN one by one, and must do new device scanning after each LUN’s presentation to make sure they are in correct order
- Present all permanent LUNs before you present temporary LUNs, so that when you decided to remove the temporary LUN in future, the PhysicalDrive number will not change
| Info |
|---|
Related articles
...
| Filter by label (Content by label) | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Readers/approval
...
- Your approval is needed for this document Bruno Miretti (Deactivated)
...