Loading/Unloading - Sony AIT-SDX460 Product Specifications Manual

16. Appendix H

16.5. LOADING/UNLOADING

The AIT cassette; 3 partitioned, Ejected cassette. The Position Information is recorded in MIC as follows.
Eject Status: AFN = Maximum AFN for P1 plus something
Partition-ID = 2
Group-count = a
Record-count = b
Save-set-mark-count = c
File-mark-count = d
Reel Diameter: S_reel_int_part = e
S_reel_frac_part = f
T_reel_int_part = g
T_reel_frac_part = h
SDX-460V reads the tape after loading and retrieves the Partition-ID from the tape comparing it with the Partition ID
obtained from the Eject Status. If the id's are the same and the Area ID on tape is ODA, then SDX-460V concludes
that the loading was successful and it clears the Position Information in MIC.
Normal Loading Sequence:
P0
Device
ODA
Area
Loading Sequence with position problem:
P0
Device
ODA
Area
Stand by here
If the Position Information on tape is different from the Position Information in MIC, then SDX-460V will rewind the
tape to PBOT, clear the Position Information in MIC, , because the position information on tape is different from the
position information in MIC), and stand by at the top of partition zero after reading the System Log information on
partition zero.
When the power fail at the time of reading/writing data from/to tape, the position information in MIC remains cleared
(all ZEROs). When a subsequent unload succeeds, the MIC will hold the appropriate position information.
Recommend the check Active Partition using Mode Select Page 10h, because after Load from ODA sometimes the
SDX-460V stand by PBOT.
16-2
P1 P2
ODA ODA
Load here
P1 P2
ODA ODA
Load here
SONY AIT-1Turbo drive SDX-460V series Ver.1.0
P3
ODA
Stand by here
P3
ODA