SCSI Commands

LOG SENSE Command (4Dh) (continued)

5.8.7Device Wellness Page (33h)

The Device Wellness Page returns information about any check conditions related to Sense Keys 1, 3, 4, and 9 logged by the tape drive. Up to 16 entries (parameter code 0000h to 000Fh) can be contained in the page; each entry records a check condition (Sense Key = 1), a medium error (Sense Key = 3), or hardware error (Sense Key = 4). Note that parameter code 000h contains the oldest log information while parameter 000Fh contains the most recent.

Only head cleaning recovered errors (more serious recovered errors) are recorded when Sense Key is 1; all sense data are recorded when Sense Key is 3 or 4.

This page begins with a 4-byte header followed by the log parameter blocks.

Bit

7

 

6

5

4

 

3

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

1

 

Reserved

 

 

 

Page Code (33h)

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(MSB)

 

 

 

 

 

 

 

 

 

2 - 3

 

 

 

 

Page Length

 

 

 

(LSB)

Figure 5–27 Device Wellness LOG SENSE Header Format

Table 5–30 Device Wellness LOG SENSE Header Field Descriptions

Field Name

Description

 

 

Page Code

The Page Code echoes the page code that was specified in the LOG

 

SENSE command descriptor block.

Page Length

The Page Length field specifies the number of bytes available and

 

depends on the parameters requested.

 

 

Quantum DLT 7000 Tape System

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Quantum Instruments DLT 7000 manual Device Wellness Page 33h, Lsb
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