Page
30
LTO SCSI Interface Manual
Field
Bytes
Bits
Description
Unit Rsvd
5
2
0 = The unit is not reserved. The Initiator Selection Address field is
invalid.
1 = An initiator has reserved the device. The Initiator Selection Ad-
dress field contains the Selection Address of the initiator.
BusReset
5
1
0 = No reset in process.
1 = Bus reset (or Fibre Channel LIP) is in process.
Clean
5
0
0 = Cleaning is not needed.
1 = Cleaning is needed.
Lun1Cmd
6
3
0 = No unforwarded command exists for LUN 1.
1 = One or more LUN 1 commands are awaiting forwarding via RS-
422.
Autoload
Mode
6
2-0
0 = Load and thread when cartridge is inserted
1 = Load and do not thread when cartridge is inserted
2 = Do not load when cartridge is inserted
Autoload Mode is controlled by the Control Mode Page
Cartridge
Type
8
Contains one of the values shown in the Cartridge Type Field Values
table below.
Cartridge
Format
9
Always 0, indicating an LTO tape cartridge.
Cartridge
Capacity
10-11
Uncompressed capacity of the cartridge, in multiples of 10
9
bytes.
Port A
Transport
Type
12
The current transport type of Port A, as specified in the Interface
Control Mode Page.
Port A
Selection
ID
13-15
The current drive address of Port A as specified in the Interface
Control Mode Page.
Port B
Transport
Type
16
The current transport type of Port B, as specified in the Interface
Control Mode Page. Zero in a Parallel SCSI drive.
Port B
Selection
ID
17-19
The current drive address of Port B, as specified in the Interface
Control Mode Page. Zero in a Parallel SCSI drive.
Operating
Hours
Since
Manufac-
ture
20-23
Total number of hours of head-tape contact time.
Initiator ID
24-31
Identification of the initiator holding a reservation on the drive, when
the Unit Rsvd field is one. If the interface is Parallel SCSI, then the
least-significant byte contains the initiator’s SCSI ID; if the interface
is Fibre Channel, then the field contains the initiator’s 64-bit world-
wide ID. If Unit Rsvd is zero, then this field is zero.
Cartridge
Serial
Number
32-63
32 bytes of ASCII data, right-filled with blanks. This is the cartridge
serial number as defined by attribute number 0201h of the SPC-2
Read Attribute command. [The SPC-2 Read Attribute command has
not been implemented.]
Reserved
Always 0
As there is only one LTO format defined at this time, the Cartridge Format value is
always zero. During insertion, the type of a data cartridge is unknown between the
time the cartridge is seated and the drive completes winding to BOT; the length
calculation takes place during winding.
