Chapter 1. Adding File Modules To An Existing Storwize V7000 System - IBM Storwize V7000 Unified Manual

Chapter 1. Adding file modules to an existing Storwize V7000
system
You can safely add IBM Storwize V7000 file modules to a working Storwize V7000
system to create a Storwize V7000 Unified system.
A Storwize V7000 Unified system provides Network Attached Storage (NAS), like
a file server, and it provides volumes as it did before by using Fibre Channel
(SCSI) and iSCSI block storage protocols.
A single management interface is provided by the file module which is currently
the active management node, for administration of both file systems and block
volumes. This simplifies storage administration with a single administrative user
interface and common CLI.
File systems are provided by IBM General Parallel File System (GPFS), running on
the file modules, and shared with Ethernet network users using industry standard
protocols such as:
v Common Internet File System (CIFS)
v Network File System (NFS)
v File Transfer Protocol (FTP)
v Hypertext Transfer Protocol Secure (HTTPS)
v Secure Copy Protocol (SCP)
Network users can be validated and have their IDs mapped by using an external
authentication directory server such as:
v Microsoft Active Directory
v Lightweight Directory Access Protocol (LDAP) with optional use of Kerberos
v SAMBA primary domain controller (PDC) on Microsoft Windows NT version 4
v Network Information Service (NIS) as an extension to Active Directory/Samba
Alternatively, a local authentication server running on the file module can be used,
but asynchronous replication of file systems requires that the local IDs on both
systems match exactly.
If one file module becomes unavailable then the other file module takes over its IP
addresses and maintains network access to file systems and the management GUI.
If both file modules become unavailable then network access to file systems is lost,
unless there are replicas of the file systems provided by other NAS systems on the
network. Access to block volumes is not affected by file modules becoming
unavailable.
File modules must be directly connected to Fibre Channel ports 1 and 2 of each
node canister in the Storwize V7000 control enclosure that is providing IO group 0.
If you currently have any of these Fibre Channel ports connected to Fibre Channel
switches then you need to plan how these connections can be made to be
redundant. Plan how to add more Fiber Channel paths, if needed, so that the
switch can be disconnected from port 1 and port 2. Do this to ensure that Fibre
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domain controller
(NT4)
PDC.
1