Chapter 2 — Architecture Overview Fibre Channel Connectivity
December 2019 User Guide—Spectra T200, T380, and T680 Libraries
58
The component identifier for each drive is based on its location relative to
the DBA where it is installed, as viewed from the back of the library (see
Figure 20 on page 56). The component identifier for a drive is shown as
DBA
x
/fTYPE-DRV
x
, where:
DBA
x
is the number of the DBA containing the drive.
x
TYPE is the interface (x= f for Fibre Channel, s for SAS, and blank for
SCSI) and drive type (LTO for an LTO drive or TS11xx for a TS11xx
technology drive).
Note: Depending on your library configuration, additional drive types
may be listed.
DRV
x
is the number of the drive bay in the DBA, as viewed from the
back of the library.
For example, Figure 21 shows the component identifier for a Fibre Channel
LTO drive installed in drive bay 1 of DBA 1 (DBA1/fLTO-DRV1) on the
Drives screen. The Drive Type descriptor indicates that the drive is an IBM
LTO-5 Fibre Channel drive.
FIBRE CHANNEL CONNECTIVITY
The library’s robotics and the library’s drives connect to the host system
over a Fibre Channel arbitrated loop or fabric, a SAS fabric, or, less often,
over a SCSI bus. These connections carry two types of information:
The commands from the storage management software that control the
robotic motion and the read/write operations of the drives.
The data being transferred to and from a drive by the host.
The following sections describe Fibre Channel connectivity for the library’s
robotics and the drives.
Figure 22 The Drives screen showing the component
identifier for a drive.
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