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Chapter 3

Notes

3.3

ETERNUS DX Disk Storage System Setup Notes

3.3

ETERNUS DX Disk Storage System Setup Notes

To connect a VMware ESX server to the ETERNUS DX Disk storage system, check that the firmware version

•

matches the version specified in the "Server Support Matrix".

Assign Affinity Group values starting from LUN0 in ascending order. The server cannot recognize the ETER-

•

NUS DX Disk storage system LUNs if some other assignment order is used.

When LUNs are shared among multiple physical servers (in a VMotion configuration, for example), an Af-

•

finity Group mapping should be used to ensure that each shared LUN is assigned the same LUN number

across every physical server.

When connecting to VMware ESX with multiple paths sharing a single LUN, a Reset Group setting is re-

•

quired for the ETERNUS DX Disk storage system device.

Details of dynamic recognition of LUNs added while VMware ESX is running are given in the

•

8 Dynamic Recognition of LUNs Added While VMware ESX is in Use " (page

3.4

SAN Boot Notes

The ETERNUS DX Disk storage systems do not support SAN Boot when they are connected via iSCSI Software

Initiator.

3.5

Server Startup and Power Supply Control Notes

Before turning the server on, check that the ETERNUS DX Disk storage systems and LAN switches are all

"Ready". Specifically, check that the Ready LED is lit for ETERNUS DX Disk storage systems. If the server is

turned on and they are not "Ready", the server will not be able to recognize the ETERNUS DX Disk storage

systems.

Also, when the ETERNUS DX Disk storage system power supply is being controlled by a connected server,

make sure that the ETERNUS DX Disk storage system does not shut down before the connected servers. Simi-

larly, the LAN switches must also be turned off after the connected servers have been shut down. If turned

off, data writes from the running server cannot be saved to the ETERNUS DX Disk storage systems, and al-

ready saved data may also be affected.

3.6

LAN Environment Notes

Since an iSCSI LAN handles large amounts of data (traffic volumes) like an FC-SAN, the iSCSI LAN must have

•

its own switch and be a dedicated LAN that is separate from the business LANs.

iSCSI LAN redundancy is achieved by the use of multipaths.

•

For IP network security, separate the iSCSI LAN from the management LAN (for administration).

•

The iSCSI LAN must be configured as a dedicated LAN for each path from a server to the ETERNUS DX Disk

•

storage system.

ETERNUS DX Disk storage systems User's Guide -Server Connection-(iSCSI) for VMware

"Chapter

40).

ESX

P3AM-3412-13ENZ0