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SCSI Guide
SCSI Operations
The following detail Scalar 1000 and Scalar 10K SCSI communication behavior.
Parity Checking
To enable parity checking on information received by the library, set the parity bit on the Parity Page of the
MODE SELECT command.
Disconnection
The library disconnects from the SCSI bus whenever a command requires a lengthy time to complete. The
library receives permission to disconnect from the initiator. The initiator grants permission by:
•
Selecting the library with the Attention signal.
•
Sending an Identify message with the DiscPriv bit set to 1.
Once the command processing completes, the library reselects the initiator and sends the Identify message.
Resetting the Library
The library is reset by a Power-On Reset (POR) or a SCSI Device Reset.
Power-On Behavior
•
The library goes to the Bus Free phase.
•
The checksum of the flash EEPROM is validated.
•
All library parameters are loaded with either saved or default values.
•
A Power On SelfTest is performed.
•
The library responds to the SCSI bus within 10 seconds of power on.
SCSI Device Reset Behavior
•
The library goes to the Bus Free phase.
•
All library parameters are returned to their saved or default values.
•
A Self Test is performed.
•
The library responds to the SCSI bus within 250 milliseconds.
Status
Value
Description
Good
00h
The library successfully completed the command.
Check
Condition
02h
An error condition occurred during command processing. The
REQUEST SENSE command responds with detailed error information.
Busy
08h
The target is busy. This status is returned when the device is unable to
accept a command from an otherwise acceptable initiator. The initiator
should reissue the command at a later time.
Reservation
Conflict
18h
This status is returned by the library when a SCSI initiator attempts to
access the library after it is reserved by another initiator with a
RESERVE command.
Summary of Contents for Scalar Distributed Library Controller 2.7
Page 1: ...ReferenceGuide Scalar DistributedLibraryController 2 7 ...
Page 8: ...viii Table of Contents ...
Page 16: ...xiv Figures ...
Page 48: ...30 Configuration ...
Page 94: ...76 Management GUI ...
Page 206: ...188 Configuration Tab ...
Page 216: ...198 Events Tab ...
Page 272: ...254 Tools and Utilities ...
Page 294: ...276 Application Notes ...
Page 302: ...284 DAS Guide ...
Page 312: ...294 SCSI Guide ...
Page 320: ...302 ROBAR Guide ...
Page 324: ...306 Index ...