Mode Pages

Page Code (02h)

Parameter List Length = 0Eh

Buffer Full Ratio

Buffer Empty Ratio

Bus Inactivity Limit

Disconnect Time Limit

Connect Time Limit

Maximum Burst Size

DTDC

Reserved

First Burst Size

This page is not savable, and this field is set to zero.

This field identifies the Disconnect-Reconnect mode page and returns 02h.

This field is set to 0Eh (14).

This field indicates how full the buffer will be (during read operations) prior to requesting an interconnect tenancy. A value of 0 is returned to indicate that requests for an interconnect tenancy are consistent with the Disconnect Time Limit field.

This field indicates how empty the buffer will be (during write operations) prior to requesting an interconnect tenancy (request for the initiator to send data). A value of 0 is returned to indicate that requests for an interconnect tenancy are consistent with the Disconnect Time Limit field.

This field indicates the maximum time limit allowed for maintaining an interconnect tenancy without any data or information transfer. A value of 0 is returned to indicate that there is no bus inactivity limit.

This field indicates the minimum wait time between interconnect tenancies. A value of 0 is returned to indicate that there is no disconnect time limit.

This field indicates the maximum duration of an interconnect tenancy. A value of 0 is returned to indicate that there is no connect time limit.

This field indicates the maximum amount of data that will be transferred during a single data transfer operation. The value is expressed in increments of 512 bytes. A value of 0 is returned if a maximum burst size is not supported.

This field indicates whether data transfers are allowed to be re-ordered. A value of 0 is returned to indicate that data transfers will always have continually increasing and contiguous data relative offset values. A value of 1 is returned to indicate that data transfers can be re-ordered.

This field indicates whether fair or unfair arbitration is used when requesting an interconnect tenancy. A value of 000b is returned to indicate that the various fairness algorithms may not be used.

A value of 0 is returned to indicate that data may be transferred for a command during the same interconnect tenancy in which the command was received.

A value of 000b is returned to indicate that data transfer disconnect control is not used.

Page Code (18h)

Parameter List Length = 06h

Protocol Identifier (0h)

EPDC

Reserved

Reserved

Reserved

This page is not savable, and this field is set to zero.

This field identifies the Fibre Channel Logical Unit Control mode page and returns 18h.

This field is set to 06h.

This field returns 0 to indicate the Fibre Channel protocol.

Page Code (19h)

Parameter List Length = 06h

Protocol Identifier (0h)

DTOLI

Reserved

Reserved

RR_TOV Units

This page is not savable, and this field is set to zero.

This field identifies the Fibre Channel Port Control mode page and returns 19h.

This field is set to 06h.

This field returns 0 to indicate the Fibre Channel protocol.

A DTFD bit of one indicates that if the target is attached by an arbitrated loop, it will not recognize the presence of a fabric loop port on the loop. The target will perform only the private loop functions defined for targets defined by FC-PLDA and FC-TAPE. When this bit is set to zero, and the target is attached by an arbitrated loop, it will discover a fabric loop port if present on the loop and perform the public loop functions defined for targets by FC-FLA. This field is ignored if the target is not attached to an arbitrated loop.

This field is set to zero to indicate that the target allows the Loop Port Bypass (LPB) and Loop Port Enable (PBE) primitive sequences to control the port bypass circuit and participation on the loop as specified by FC-AL-2. When not attached to an arbitrated loop, this field is ignored.

This field returns zero to indicate that the target will wait to complete target discovery as defined by FC-PLDA, FC-FLA, and FC-TAPE before allowing processing of tasks to resume. When not attached to an arbitrated loop, this field is ignored.

If this field returns zero, it indicates the target may participate in loop master arbitration in the normal manner and, if successful, may become loop master during the loop initialization process. If this field returns 1, it indicates the target does not become loop master, and that the target repeats LISM frames it receives. This allows the Initiator to be loop master during loop initialization. This field is ignored when not attached to an arbitrated loop.

A RHA bit of one indicates that if the target is attached to an arbitrated loop, it will only attempt to obtain its hard address available in the SCA-2 SFF- 8067 connector or device address jumpers during loop initialization. The target will not attempt to obtain an address during the LISA phase of initialization. If there is a conflict for the hard address selection during loop initialization or the target does not have a valid hard address available, the target shall enter the nonparticipating state. If the target detects loop initialization while in the nonparticipating state, the target will again attempt to get its hard address. If the hard address has not changed from the address obtained in a previous successful loop initialization, the target will attempt to obtain the address in the LIFA phase if a valid Fabric Login exists or LIPA phase of loop initialization. If the hard address has changed, the target will attempt to obtain the new address in the LIHA phase. When the RHA bit is set to zero, the target follows the normal initialization procedure, including the possibility of obtaining a soft address during the loop initialization process. When not attached to an arbitrated loop, this field is ignored the RHA bit.

This field returns zero to indicate the target will perform the normal loop initialization procedure before entering the monitoring mode and accepting a login ELS. This field is ignored when not attached to an arbitrated loop.

This field returns zero to indicate the target will enable itself onto the loop according to the rules specified in FC-AL-2. This field is ignored when not attached to an arbitrated loop.

This field returns zero to indicate the target attached by an arbitrated loop will generate LIP(F7,xx) after it enables a port into a loop. If the target is attached to an arbitrated loop and detects loop failure at its input, it shall follow the error initialization process defined by FC-AL-2 regardless of the state of this bit. This field is ignored when not attached to an arbitrated loop.

This field indicates the units for the Resource Recovery Time-out Value field. A value of 3 is returned to indicate the units are in tenths of seconds.

Page Code (1Ch)

Parameter List Length = 0Ah

LogErr

MRIE

Interval Timer

Report Count

This page is not savable, and this field is set to zero.

This field identifies the Informational Exceptions Control mode page and returns 1Ch.

This field is set to 0Ah (10).

This field is set to 0 to indicate that logging of informational exception conditions is vendor specific (unique to the library in this case).

This field is set to 0 to indicate that test failure indications will not be generated.

This field is set to 1, indicating that the initiator must poll the LOG SENSE Tape Alert page.

This field is set to 0, indicating that reporting of warnings is disabled.

This field is set to 0 indicating that background functions are not enabled.

This field is set to 0 to indicate that informational exception operations that are the cause of delays are acceptable.

This field is set to 0h to indicate that exception conditions or warnings will not be reported, and that the initiator must poll.

This field is set to 0000 0000h to indicate that the interval is vendor specific. The library does not support a timer interval.

Page Code (1Dh)

Parameter List Length = 12h

First Medium Transport Element Address (0001h)

Number of Medium Transport Elements

First Storage Element Address (1000h)

Number of Storage Elements

First Import/Export Element Address (0010h)

Number of Import/Export Elements

First Data Transfer Element Address (0100h)

Number of Data Transfer Elements

Reserved

This page is not savable, and this field is set to zero.

This field identifies the Element Address Assignment mode page and returns 1Dh.

This field is set to 12h (18).

This returns 0001h, which is the address of the first medium transport element (accessor).

This field returns 0001h.

This field returns 1000h, which is the address of the first storage element.

This field varies, depending on the configuration of the subsystem.

This field returns 0010h, which is the address of the first Import/Export element.

This field varies, depending on the configuration of the subsystem. If no Import/Export elements are installed, this field returns zero.

This field returns 0100h, which is the address of the first data transfer element (drive).

Page Code (1Eh)

Parameter List Length = 02h

Rotate

This page is not savable, and this field is set to zero.

This field identifies the Transport Geometry Parameters mode page and returns 1Eh.

This field is set to 02h, since only a single medium transport is reported.

This field returns 0, since double-sided media is not supported.

Page Code (1Fh)

Parameter List Length = 12h

Reserved

This page is not savable, and this field is set to zero.

This field identifies the Device Capabilities mode page and returns 1Fh.

This field is set to 0Eh (14).

This field is set to 1 to indicate that the data transfer elements (drives) can store cartridges.

This field is set to 1 to indicate that the Import/Export elements can store cartridges.

This field is set to 1 to indicate that the storage elements can store cartridges.

This field is set to 0 to indicate that the accessor cannot store cartridges.

An import/export element state (IEST) bit set to one indicates that the media changer is able to detect medium presence in all import/export elements. An IEST bit set to zero indicates that the media changer is not able to detect medium presence in all import/export elements.

The value returned is 1.

A user control import/export element open (USROP) bit set to one indicates that the media changer requires the operator to manually open a closed import/export element. An USROP bit set to zero indicates that the media changer does not require the operator to manually open a closed import/export element.

The value returned is 1.

A user control import/export element close (USRCL) bit set to one indicates that the media changer requires the operator to manually close an open import/export element. An USRCL bit set to zero indicates that the media changer does not require the operator to manually close an open import/export element.

The value returned is 1.

A move opens import/export element (MVOP) bit set to one indicates that the media changer opens the import/export element for operator access whenever a command is issued to move media with an import/export element as a destination element address. An MVOP bit set to zero indicates that the media changer does not open the import export element for operator access whenever a command is issued to move media with an import/export element as a destination element address.

The value returned is 0.

A move prevented to import/export element (MVPRV) bit set to one indicates that the media changer prevents moves with the import/export element as a destination element address when medium removal is prevented with the PREVENT ALLOW MEDIUM REMOVAL command. An MVPRV bit set to zero indicates that the media changer does not prevent moves with the import/export element as a destination element address when medium removal is prevented with the PREVENT ALLOW MEDIUM REMOVAL command.

The value returned is 1. If media removal is prevented the media changer does not lock the IE station(s) and allows IE access for library managed operations such as export operations of cleaning tapes or operator directed import operations.

A storage magazine (SMGZ) bit set to one indicates that the media changer uses media magazines for some storage elements. A SMGZ bit set to zero indicates that the media changer does not use media magazines for any storage element.

The value returned is 1.

An import/export magazine (IEMGZ) bit set to one indicates that the media changer uses media magazines for some import/export elements. An IEMGZ bit set to zero indicates that the media changer does not use media magazines for any import/export element.

The value returned is 1.

A move tray (MVTRY) bit set to one indicates that the media changer requires the medium to be placed in a tray and the tray moved to the desired position as part of a move operation (e.g., a CD-ROM must be placed in a tray, then loaded into a data transfer device). A MVTRY bit set to zero indicates that the media changer does not use trays.

The value returned is 0.

A return to source storage element address (RSSEA) bit set to one indicates that the media changer is only able to move a volume from a data transfer device to the element address from which it A RSSEA bit set to zero indicates that the media changer is able to move a volume from a data transfer device to an element address other than the element address from which it came.

The value returned is 0.

A data transfer element empty on door access (DTEDA) bit set to one indicates that the media changer does not allow the door to be opened if any data transfer element contains a volume. A DTEDA bit set to zero indicates that the media changer does not prohibit opening the door if a data transfer element contains a volume.

The value returned is 0.

A true exchange capable (TREXC) bit set to one indicates that the media changer allows an EXCHANGE MEDIUM command that has the second destination element address equal to the source element address. A TREXC bit set to zero indicates that the media changer does not allow an EXCHANGE MEDIUM command that has the second destination element address equal to the source element address.

The value returned is 1.

A lock door (LCKD) bit set to one indicates that the PREVENT ALLOW MEDIUM REMOVAL command with the PREVENT field set to 01b secures the media changer door(s). An LCKD bit set to zero indicates that the PREVENT ALLOW MEDIUM REMOVAL command with the PREVENT field set to 01b does not secure the media changer door(s).

The value returned is 0.

A lock import/export element (LCKIE) bit set to one indicates that the PREVENT ALLOW MEDIUM REMOVAL command with the PREVENT field set to 01b secures the media changer import/export element(s). An LCKIE bit set to zero indicates that the PREVENT ALLOW MEDIUM REMOVAL command with the PREVENT field set to 01b does not secure the media changer import/export element(s).

The value returned is 1.

A pre-eject position (PEPOS) bit set to one indicates that the media changer requires a POSITION TO ELEMENT command to position the medium transport element to a data transfer element before an eject. A PEPOS bit set to zero indicates that the media changer does not require a POSITION TO ELEMENT command to position the medium transport element to a data transfer element before an eject.

The value returned is 0.

A destination pre-move eject required (DPMER) bit set to one indicates that the media changer requires an application client to send a command to the data transfer device to prepare the data transfer device to accept a move to this data transfer element (e.g., command a CD-ROM drive to extend the tray). A DPMER bit set to zero indicates that an application client does not need to send a command to the data transfer device to accept a move to this data transfer element.

The value returned is 0.

A source pre-move eject required (SPMER) bit set to one indicates that the media changer requires an application client to send a command to the data transfer device to prepare the data transfer device to accept a move from this data transfer element. A SPMER bit set to zero indicates that an application client does not need to send a command to the data transfer device to prepare the data transfer device to accept a move from this data transfer element.

This value may be returned as 0 or 1 and depends on the library partition setting to have the library assist with unload operations or not, respectively.

Note: It is good practice to always issue an unload/eject request to the drive prior to requesting media to be moved forma a drive, regardless of the value reported in the SPMER bit.