User manual QUANTUM TRAVAN 40 10-23-2002

[. . . ] Product Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 2002 Seagate Removable Storage Solutions LLC. All rights reserved Part Number 100249522 Seagate and the Seagate logo are registered trademarks of Seagate Technology LLC. Other product names are trademarks or registered trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. [. . . ] 32767 (0x7FFF): This will set all of the TapeAlert flags in the Log Page that are supported by the target. Once the supported TapeAlert flags are set they are processed normally based on the Dexcpt, MRIE, Interval Count and Report Count values. Interval Timer (Default set to 0): When this field is set to 0, this indicates that the target shall only report the informational exception condition one time. When this field is set to non-0, the value indicates the period in 100 millisecond increments for reporting that an informational exception condition has occurred. The target shall not report informational exception conditions more frequently than the specified timer interval and as soon as possible after the timer interval has elapsed. A value of 0xFFFFFFFF in the field indicates the timer interval is vendor specific. Report Count/Test Flag Number (Default set to 0): This field has a dual purpose. When the Test bit is set to 0, then the value of this field in the MODE SELECT data represents the Report Count, which is what is always returned in response to a Mode Sense command. When the Report Count field is set to 0, this indicates that there is no limit on the number of times the target shall report the informational exception condition (assuming that Interval Timer is set to non-0). When the Report Count field is set to non-0 this indicates the number of times to report an informational exception condition. If multiple TapeAlert flags are set simultaneously, these are reported as a single informational exception condition. When a MODE SELECT command is sent with the Test bit is set to 1, then the value of this field in the MODE SELECT data represents the Test Flag Number, which is never returned in response to a Mode Sense command. Valid vales of the Test Flag Number are ­64 to 64 and 32677 (0x7FFF). Negative numbers are represented using the 2's complement method. If the Test Flag Number is set to an invalid value, then the MODE SELECT command will return Check Condition, with Sense Key set to Illegal Request and extended sense set to Invalid Field in Parameter List. If the device does not support Test Flag Number, then when the Test bit is set to 1 and the Test Flag Number is set to non-0, the MODE SELECT command will return Check Condition. The Sense Key is set to Illegal Request and extended sense set to Invalid Field in Parameter List. Page 58 Seagate Travan 40 Product Manual ATAPI Interface Chapter 5 MRIE (Default set to 0x3): This field indicates the method used by the target to report informational exception conditions (note that this is standard SCSI terminology and is not related in any way to the "Information" severity level for the flags). The priority of reporting informational exception conditions is vendor specific. If the informational exception condition was generated by an event that caused a real Check Condition to occur, then this real Check Condition will over-ride (i. e. be used instead of) the Check Condition defined in MRIE modes 0x1 to 0x5. The values defined for this field are: 0×0: No reporting of informational exception conditions. This method instructs the device server to not report information exception conditions 0×1: Asynchronous Event Reporting. [. . . ] The computer generally controls these devices indirectly through the means of a controller (another piece of hardware) and a program or other programs. Quarter Inch Cartridge Drive Standards, Incorporated When the only one device on an IDE bus is a `master' (e. g. , there is no `slave'), the `master' device is responsible for providing certain responses from the Host to the missing `slave' device. The ATA-3 and ATA-4 documents specify different behaviors for this configuration. This is a method of performing device I/O, where the Host processor must explicitly read or write two bytes at a time via the taskfile Data register. [. . . ]