HP C2488A Technical Reference Manual page 123

Access Log
Access Log Data Header Format
The log information is preceded by a 4-byte header.
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
00--01
Reserved
02-03
(MSB=02) A vailable Length
(LSB=03)
Available Length. This field defines the number of bytes following the header. This length
does not include the 4-byte header itself. The header is followed by zero or more log entries.
Each log entry begins with a 2-byte header identifying the type and length (excluding the
header) of the following entry. The log types are defined as follows:
• OOH - No information
• 01H - Usage log entry
• 02H - Data Error log entry
• 03H - Hardware Error log entry
Usage Log Entry
The Usage log entry conveys usage information about the entire device. The length of this
entry is 12 bytes.
Usage Log Entry Header Format
Bit
Byte
7
I
6
I
5
I
4
I
3
j
2
I
1
I
0
00
Log Entry Type = OlH
01 Log Entry Length - OCH
Usage Log Entry Data Format ..
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
02 Reporting Area - FFH
03 Reserved
I
Access Count
04-09 (MSB=04) Blocks Read Count (LSB=09)
10-11 (MSB-IO) First Retry Count
(LSB=ll)
12-13
(MSB=12)
Multiple Retry Count
(LSB=13)
Reporting Area. This field is set to FFH, indicating that the entry refers to the entire device.
DRAFT
Vendor Unique Command Descriptions B·3
1/18/93 09:58