IBM Magstar 3494 manual Operational Characteristics

3494 Model B16 Virtual Tape Server Controls	39
3494 Model B18 Virtual Tape Server Controls	39
Chapter 3. Operational Characteristics	41
3490E/3590 Tape Subsystem Operation	41
Virtual Tape Server	41
Emulation of 3490-Type Tape Drives	41
Tape Volume Cache	42
Storage Management of the Tape Volume Cache	42
Maintaining Data Fragments from Copied Volumes	42
Fast Response for Non-speci®c Mount Requests	42
Deletion of VTS Logical Volume	43
Scratch Stacked Volumes	43
Integration with the 3494 Library	44
Logical Library Partitioning	44
SCSI Host Attachment	44
Operator Interface	45
Logical Volume Inventory	45
VTS Import/Export Overview	45
Local and Remote Power Control	45
Operator Involvement	46
System Administrator Involvement	46
Error Detection and Reporting	47
Inventory Update . . . . . . . . . . . . . . . . . . . . . . . . 47
Volume Categories	48
Physical Volume States	52
Logical Volume States	52
Physical Volser Validity Checking	52
Logical Volser Validity Checking	53
Command Priorities in the Queue	54
Priority Levels . . . . . . . . . . . . . . . . . . . . . . . . . 54
Operations	55
Host-Initiated Operations	55
Export Operations	57
Import Operations	57
Stand-Alone Operations	57
Initial Cartridge Installation	58
Cartridge Placement	59
Initial Volume Inventory Upload	59
Host Operation Control	59
Actions to Avoid when Operating a 3494	59
Things You Should Never Do	60
Things You Should Try to Avoid Doing	60
Chapter 4. Operational Modes and States, and Informational States . . .	63
Operational Modes	63
Auto Mode	63
Pause Mode	63
Manual Mode	63
Additional Operational Modes in the HA1 Environment	64
Home Cell Mode	65
Operational States	65
Library manager initialization	65
Initialization complete	66
Online State	66
Offline State	66

ivMagstar 3494 Tape Library Operator Guide