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1.
No ACI commands are outstanding. This not only means that the tape drive must have received
acknowledgement for all responses to all ACI commands received, but also that all immediate
response commands have also finished. For example, if an Automation Controller initiates an
immediate response Load command (see section 5.3 of ACI specification), it cannot issue an ADI
command until the tape drive has finished physically loading the cartridge. If an ACI command
is outstanding when an ADI frame is received the drive will transmit an ACI <NAK> character
in response.
2.
An Encoded ADI frame received when the tape drive is in ACI Mode must not exceed the Receive
Buffer size (see section 5.16 of the ACI Specification for details) and the frame must be received
within the ACI Transmission Period (see section 4.6.6.3.2 of the ACI Specification). If either of
these conditions is exceeded the tape drive will transmit a <NAK> character.
3.
ADI frames received in ACI Mode must be Port Login frames otherwise the tape drive will revert
to ACI Mode after transmitting the appropriate ADI response.
4.
The ADI protocol must be enabled; see the Set Drive Configuration command (section 5.6 of the
ACI Specification) for details. If the tape drive receives an ADI frame when the ADI protocol has
been disabled the drive will transmit a <NAK> character.
When the tape drive is in ADI Mode it will not acknowledge or respond to any ACI command until
the ADI port becomes logged out, either with an explicit Port Logout frame or an ADI Reset.
When the tape drive transitions from one mode to the other (ACI to ADI or ADI to ACI) it will not
implicitly change the drive's configuration. However, Automation/Drive Interface [ADC-2] SCSI mode
parameters only apply when the tape drive is in ADI Mode, so the tape drive behavior may change
after transitioning between the two modes.
HP recommends that the drive is used in either exclusively ACI or ADI modes of operation. Avoid
mixing operation of the two modes.
Internet Automation Device interface (iADT)
The iADT or Ethernet port provides all the same functionality as the ACI/ADI port but can also be
used for:
•
drive management
•
encryption control/key management
•
diagnostic extraction
The iADT port supports the following network services via the 10/100 Mbpa Ethernet port:
Service Name
iADT
iADI-TLS
iADT-DISC
iDTI
How the LTO-5 drive will be configured depends upon the overall configuration of the data storage
site. The site consists of a number of entities:
72
Special features for automation
Port Number/Base Protocol
4169/TCP
9614/TCP
4169/TCP
4167/TCP
Description
Internet Automation Device Interface using non-secure
ADT protocol over TCP (see ADT-2).
Internet Automation Device Interface using secure ADT
protocol over TCP (see ADT-2).
iADT Discovery over UDP (see ADT-2).
Internet Diagnostic Tools Interface using non-secure
ADT protocol over TCP.
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Troubleshooting
