v SCSI terminator
v SCSI host cable
v Drive sled
If the failure still exists, it probably is caused by the host system hardware or
software. Refer to the service documentation for the host system.
Fixing an Intermittent Error with Multiple Drives on a SCSI
Bus
1. Verify that the latest level firmware is installed on the drive. Update the
firmware, if necessary.
Required library firmware and drive firmware can be downloaded by visiting
http://www.ibm.com/storage/lto.
2. Check host error logs to determine if a specific cartridge is causing the
problem. Replace the cartridge that is listed as being faulty.
3. If the problem still exists, replace the following:
v SCSI terminator
v SCSI host cable
v SCSI drive-to-drive cables
If the failure still exists, it probably is caused by the host system hardware or
software. Refer to the service documentation for the host system.
Fixing Fibre Channel Errors
If you are connected to a Fibre Channel Storage Area Network (SAN) by using a
SAN Data Gateway, use the IBM Storage Area Network Gateway Module Setup,
Operator, and Service Guide to determine whether the problem is occurring between
the drive and the SAN Data Gateway. If you are using a SCSI drive and are having
SCSI problems, see “Fixing SCSI Bus Problems” on page D-51.
Supported Topologies
The Ultrium 3 and Ultrium 4 tape drives can be attached in a two-node
configuration, either directly to a switch as a public device (switched fabric) or
directly to a host bus adapter (HBA) as a private device. It can do so in a
Point-to-Point topology (through an N_port or F_port) or Arbitrated Loop topology
(through an L_port or FL_port).
The Ultrium 3 and Ultrium 4 tape drives automatically configure to an L_port or
an N_port when it boots. The type of port to which it configures depends on
whether the drive recognizes the connection as a loop or a point-to-point
connection:
v An L_port supports a Fibre Channel Arbitrated Loop connection to an NL_port
or FL_port.
v An N_port supports direct connection to another N_port or to an F_port (for
example, a director-class switch) in a point-to-point topology.
Regardless of the port to which you connect the drive, it automatically configures
to a public device (through an F_port or FL_port to a switch) or to a private device
(through an N_port or L_port by using direct attachment to a server).
D-54 TS3310 Tape Library Maintenance Information
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