Host Requirements - Dell EMC ML3 User Manual

v Secondary Ethernet port - The secondary network port can be disconnected and service personnel can
use it to connect a laptop directly to the library.
IP range selection
For internal communication between modules, the tape library uses an Ethernet connection with an
internal IP address range. To prevent any conflict between the internal IP address range and the external
IP addresses, you must select the internal IP range. Choosing the Internal IP address range, and also
entering the external IP address information is part of the initial setup of the library.

Host requirements

The library requires attachment to supported SAS or FC HBAs. See "Host connectivity" on page 20.
Follow these general guidelines.
v Check with a system administrator before the host computer is powered off.
v For a SAS library, confirm availability or install a SAS HBA that supports multiple LUNs.
v For a direct-attach Fibre Channel library, confirm availability of installation of an FC HBA.
v For connection of a Fibre Channel library through a compatible switch, verify that sufficient ports are
available.
Persistent binding to ensure SCSI ID assignment
When a server is booted, devices are discovered and assigned SCSI target and LUN IDs. It is possible for
these SCSI assignments to change between boots. Some operating systems do not guarantee that devices
are always allocated the same SCSI target ID after rebooting. Also, some software depends on this
association, so you do not want it to change. The issue of SCSI ID assignment is addressed by persistent
binding.
Persistent binding is an HBA function that allows a subset of discovered targets to be bound between a
server and device. Implemented by a worldwide node name (WWNN) or worldwide port name
(WWPN), persistent binding causes a tape drive's WWNN to be bound to a specific SCSI target ID. After
a configuration is set, it survives restarts and any hardware configuration changes because the
information is preserved. If a drive must be replaced, the new drive assumes the WWNN of the old drive
because the WWNN for the drive is location-dependent within the library. Because the WWNN does not
change, persistent binding does not need changing, thus preventing a potential outage.
Static Sensitive
Risk of damage to devices
v A discharge of static electricity damages static-sensitive devices or
micro circuitry.
v Proper packaging and grounding techniques are necessary
precautions to prevent damage.
31
Planning