Manualsbrain.com
  1. Manuals
  2. Brands
  3. Sony
  4. SDX-800V/R
  5. User Manual

Sony SDX-800V/R User Manual

Download
Page of 206
6.Command Specification 
LOG SENSE
6-24 
 
SONY AIT-3Ex drive SDX-800V series Ver.1.1 
6.6.7.  Tape Log Page (Sony Unique) 
This page is a Sony unique page which provides information on the tape currently being used. This log cannot be 
cleared and has the following format: 
Table 6-21: Tape Log Page 
Bit 
Byte 
7 6 5 4 3 2 1 0 
0 
Reserved   
Page Code (30h) 
1 
Reserved 
2 
(MSB) 
Page Length (98h) 
 
3 
  
(LSB) 
4 
(MSB) Parameter 
Code  
5 
 
 
 
6 
DU (0) 
DS (1) 
TSD (0)
ETC (0)
TMC (00) 
LBIN (0) 
LP (0) 
7 
Parameter Length (m) 
8 
 Parameter 
Value  
3+m 
 
 
 
This page is used to return Tape Log information to the host in a format which conforms to the LOG SENSE 
command page format.  
Supported Parameter Codes in this page are listed below along with their meanings: 
Table 6-22: Tape Log parameter codes 
Parameter Code 
Description 
Length 
 
001h 
002h 
003h 
004h 
 
005h 
006h 
007h 
008h 
 
009h 
00Ah 
00Bh 
00Ch 
 
00Dh 
 
Current Groups Written 
Current Rewritten Tracks 
Current Groups Read 
Current C3 ECC Count 
 
Previous Groups Written 
Previous Rewritten Tracks 
Previous Groups Read 
Previous C3 ECC Count 
 
Total Groups Written 
Total Rewritten Tracks 
Total Groups Read 
Total C3 ECC Count 
 
Load Count 
 
8 
8 
8 
8 
 
8 
8 
8 
8 
 
8 
8 
8 
8 
 
4 
 
This information is contained within RAM in the Drive Controller. The log is updated as the tape is used.   
The term 'current' refers to information generated during the current load of the tape; 'previous' refers to information 
generated during the last tape load; 'total' refers to information generated during the life of the tape since it was first 
initialized including the current load. 
Use: An estimate of reading and writing performance can be made by the ratios of 'Total Groups Written' to 
'Rewritten Tracks' and 'Groups Read' to 'C3 ECC Count'. An indication of tape degradation can be gained by 
comparing these ratios for 'current', 'previous' and 'total' entries. 
Any attempt to change this page using LOG SELECT will result in a CHECK CONDITION with a Sense Key of 
ILLEGAL REQUEST. The current cumulative values will be returned regardless of the Page Control field in the LOG 
SENSE CDB.