42
•
FlashCopy and VolumeCopy of Independent Auxiliary Storage Pools (IASPs) are
supported
Enhanced Remote Mirroring (ERM):
•
DS5100 and DS5300 ERM with direct attachment to IBM i is supported on IBM Power
servers (but
not
on IBM Power blades)
•
Synchronous ERM (DS5100 and DS5300
Metro Mirror
) is supported
•
Asynchronous ERM with Write Consistency Groups (DS5100 and DS5300
Global
Mirror
) is supported
•
Asynchronous ERM (DS5100 and DS5300
Global Copy
) is
not supported
•
Full-system ERM (Metro and Global Mirror) for a planned switchover (IBM i production
LPAR is powered off) is supported
•
Full-system ERM (Metro and Global Mirror) for an unplanned failover (IBM i production
LPAR is running) is supported
•
ERM (Metro and Global Mirror) with IASPs for a planned switchover (IBM i production
LPAR is powered off) is supported
•
ERM (Metro and Global Mirror) with IASPs for an unplanned failover (IBM i production
LPAR is running) is supported
17. N_Port ID Virtualization (NPIV) for IBM i
17.1. Overview
NPIV is an industry-standard Fibre Channel (FC) protocol that allows VIOS to directly share a
single FC adapter among multiple client LPARs. Unlike Virtual SCSI (VSCSI), NPIV does not
map a LUN to a virtual target device in VIOS, which the client LPAR can then access as a generic
SCSI disk. Instead, a port on the physical FC adapter is mapped to a Virtual Fibre Channel (VFC)
server adapter in VIOS, which in turn is connected to a VFC client adapter in IBM i. When the
VFC client adapter is created, two unique world-wide port names (WWPNs) are generated for it.
Through the link to the server VFC adapter and then the physical adapter in VIOS, those WWPNs
become available on the SAN and storage can be mapped to them as with any other FC host
ports. Note that these WWPNs are unique not just within the Power server, but globally on the
SAN. The PowerVM Hypervisor creates two WWPNs per VFC client adapter to facilitate Live
Partition Mobility for LPARs using NPIV. Live Partition Mobility is currently supported for AIX and
Linux LPARs. When a VFC client adapter is deleted, the WWPNs are not reused. By default, the
PowerVM Hypervisor is capable of creating 32,000 WWPNs for VFC client adapters. If additional
WWPNs are required, clients can acquire an enablement code from IBM. The following diagram
illustrates using NPIV for IBM i:
Содержание I VIRTUALIZATION - READ ME FIRST 7-9-2010
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