Quantum Scalar i6000 Guide de l'utilisateur Page 48

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Chapter 2: Description
Host Attachment
42 Scalar i6000 Planning Guide
•LTO-4 uses 4 Gb
LTO-3 uses 2 Gb and 4 Gb
LTO-2 uses 1 Gb and 2 Gb
•LTO-1 uses 1 Gb
Path Failover (Previously Native Storage Networking (nSNW)
(Ethernet Expansion Blade Attached) — Applies to nSNW HP LTO-
5 FC or LTO-6 drives connected to an Ethernet Expansion blade only.
The native 8 Gb FC port on the drive is used. These drives also
support basic or advanced data path failover using a second FC port
on the tape drive, so if you want to use data path failover, two ports
per drive are required.
Storage Networking (SNW) (Fibre Channel I/O Blade Attached)
— The data paths connect to the library through a dedicated 4 Gb
FC port on an FC I/O blade. Drives must be SNW tape drives and
attached to an FC I/O blade. Up to four tape drives can be supported
per FC I/O blade.
Path Failover Path Failover (previously Native Storage Networking or nSNW) is a set of
features that increase control path and data path availability. There are
three path failover options:
Advanced Path Failover for IBM LTO-5 and higher drives
Advanced Path Failover for HP LTO-6 and higher drives
Basic Path Failover for IBM and HP LTO-5 and higher drives
Advanced path failover supports multiple FC fabrics and requires a
specific Quantum driver installed on host computers.
Basic path failover either uses 1) NPIV technology supporting a single FC
fabric with no driver needed or 2) the path management solution of the
application.
All three path failover options support library control path and/or data
path failover. IBM and HP LTO-5 and higher drives have two FC ports on
the drive. When a path failover license is added to the library, the
second FC port on one drive is enabled. The second port is needed for
data path failover but is not necessary for control path failover.
The control path fails over to the second port on a drive and then to
another drive that is configured for CPF. If a customer is interested in
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