Ng scan, Volumes used for ng scans – HP XP P9500 Storage User Manual
Page 105
NOTE:
When disk configuration information is acquired using a remote scan on any of the
storage systems below, the capacities of the discovered volumes are not acquired. Therefore, the
P-VOLs' and S-VOLs' capacities for pairs cannot be checked by BCM. Make sure that you define
pairs so that the capacities of the P-VOLs and S-VOLs are equal when using disk configuration
information acquired using a remote scan of any of the following storage systems.
•
XP1024/XP128 Disk Array
•
XP12000 Disk Array
•
XP24000 Disk Array
NG scan
The volumes on a storage system that is directly connected to a host (volumes that are not defined
in the operating system I/O configuration definitions and that the OS does not recognize) are
called Non Gen’ed volumes.
To acquire disk configuration information about Non Gen'ed volumes and define a copy group
for the volumes, perform a function called an NG scan.
The disk configuration information acquired by an NG scan does not have device numbers (DEVN)
that are host attributes, because the information is not defined in the operating system I/O
configuration definitions. Therefore, a dummy device number must be allocated to the disk
configuration information acquired from the NG scan by using Business Continuity Manager.
An NG scan can be performed on XP12000/XP10000, XP24000/XP20000, and XP P9500
storage systems.
Volumes used for NG scans
The NG scan uses either a command device or the volume from which disk configuration information
was acquired by a local scan (the first volume in the disk configuration definition file) to acquire
information from the volumes that the OS does not recognize. If you use a command device, set
up a command device and route list before executing an NG scan.
and
show operational images of the NG scan using a
command device or the local scanned volume. The following legend applies to each of these
figures.
shows an operational image of an NG scan when using a command device.
Functions that acquire volume information 105