Quantum 1200 Series DAT Autochanger Podręcznik Użytkownika Pobierz pdf (Strona 210)

READ ATTRIBUTE Command (8Ch) SDLT 600 SCSI Interface Guide

4-168 January 2005 81-81200-02 REV A01

TOTAL MBYTES WRITTEN IN MEDIUM LIFE AND

TOTAL MBYTES READ IN MEDIUM LIFE: Indicates the total number of data bytes transferred

to or from the medium surface, after any data compression has been applied, over the entire medium

life. These values are cumulative and are never reset. These values are expressed in increments of

1,048,576 bytes; that is, a value of 1 means 1,048,576 bytes, 2 means 2,097,152 bytes, and so on.

TOTAL MBYTES WRITTEN IN CURRENT/LAST LOAD

AND

TOTAL MBYTES READ IN CURRENT/LAST LOAD: Indicates the total number of data bytes

transferred to or from the medium surface, after any data compression has been applied, during the

current load if the medium is currently loaded or the last load if the medium is currently unloaded. The

drive resets these attributes to 0 when the medium is loaded.

These values are expressed in increments of 1,048,576 bytes; that is, a value of 1 means 1,048,576

bytes, 2 means 2,097,152 bytes, and so on.

MEDIUM USAGE HISTORY: Provides statistics (see Figure 4-91) for the entire medium. If a field

is not used, it is set to 0.

Table 4-99. DEVICE VENDOR/SERIAL NUMBER Attribute Parameter Data — Field

Descriptions

Field

Name Description

Vendor ID Contains the same value returned in the STANDARD INQUIRY data.

Product

Serial

Number

Contains the unit serial number.

Bit

Byte

7 6 5 4 3 2 1 0

0 – 5

(MSB)

Current Amount of Data Written

(LSB)

6 – 11

(MSB)

Current Write Retries Count

(LSB)

12 – 17

(MSB)

Current Amount of Data Read

(LSB)

1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 293 294

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Quantum 1200 Series DAT Autochanger Podręcznik Użytkownika Strona 210