3-14
Operating Instructions
500300 Rev. U
3.7.5.1
Terminating Runaways Via the Host
One method of recovering from a tape runaway in non-SCSI drives is via the
Formatter Enable interface line (IFEN), or via a Bus Reset if using the SCSI
configuration. This is the recommended method, and is described in Product
Specifications 500240 (341X), 500540 (340X), and 500358 (SCSI Interface Manual).
In order to use this method, your controller must support IFEN, and you must set
the FEN ABORT parameter in the Drive Configuration menu to
YES
. See Section
4.3.2 for more information.
3.7.5.2
Terminating a Write Operation By Taking the Drive Offline
If a runaway exists during a write operation, it is most likely caused by a missing
ILWD signal from the host. In this case, pressing ONLINE will abort the operation
as described in Section 3.8.
3.7.5.3
Terminating Runaways By Removing Power
A runaway condition will be terminated when the power goes off. The drive will
respond exactly as though a power outage had occurred. This action should be
sufficient to cause the host to request further user input.
3.8
Aborting Online Operations from the Front Panel
You may interrupt most online operations while the drive is busy by pressing the
ONLINE switch. If the Command Display parameter in the Drive Configuration
menu is enabled, the last command received will be displayed. The following
paragraphs describe what happens when taking the drive offline while various
operations are in progress.
•
REWIND -
Taking the drive offline while the tape is rewinding has no effect on
the rewind operation.
•
READ and SPACE -
The drive will complete these operations and go offline at
the end of the current block. The drive will resume normal operation when
placed back online.
•
FILEMARK SEARCH and SECURITY ERASE -
The drive will terminate the
operation immediately and will resume normal operation when placed back
online.
•
WRITE FILEMARK and FIXED LENGTH ERASE -
The drive will complete
these operations before going offline. The drive will resume normal operation
when placed back online.
•
WRITE -
The drive will truncate the current block and write a normal
postamble before going offline. The block will be readable (assuming no errors
occurred) but will be shorter than expected. The drive will resume normal
operation when placed back online.
