6760 ServerNet/DA Manual

Migrating Data From a D-Series Release
6760 ServerNet/DA Manual—424879-003
D-2
The G-Series Configuration
This configuration shows that the primary and mirror disks of $DATA00, which are in
two separate disk modules, are controlled by four paths:
•
The primary path: controller A to disk unit 0
•
The backup path: controller B to disk unit 0
•
The mirror path: controller C to disk unit 7
•
The mirror backup path: controller D to disk unit 7
This configuration also shows that the following attributes are set:
•
The disk process can run at a high PIN (HIGHPIN ON)
•
The number of disk I/O processes allocated is limited to 5 (NUMDISCPROCESS 5)
The G-Series Configuration
The Subsystem Control Facility (SCF) is used to configure disks on G-series releases,
so instead of using a CONFTEXT configuration file, you use SCF commands.
The following example assumes that you are moving the disks from the NonStop
K-series system (as described in the PERIPHERALS paragraph in Example D-1). This
means that the mirrored volume $DATA00 continues to have four controllers on the
G-series system. For maximum fault tolerance, this example also assumes that the
controllers (SACs) reside on four separate 6760 adapters. Other assumptions are:
•
The 6760 adapters are in slots 51, 52, 53, and 54 of I/O enclosure 21.
•
The primary and mirror disks are in separate disk modules.
•
SAC 1 is used for all the paths.
•
Disk unit 0 is the primary disk for $DATA00.
•
Disk unit 7 is the mirror disk for $DATA00.
•
NUMDISCPROCESS must be set to 5 (the default value is 4).
•
Processors 2 and 3 are assigned as the primary and backup processors by default,
because those are the only processors available for 6760 adapters installed in a
group 2 enclosure).
Example D-1. PERIPHERALS Paragraph
PERIPHERALS Paragraph
!Device Controller/Unit # Macro/Modifiers.
!Name
$DATA00 CtlrA-CtlrB.0.CtlrC-CtlrD.7 4580 HIGHPIN ON,
NUMDISCPROCESS 5;