Operating instructions

8-10
SCSI REFERENCE 1012975
CHAPTER 8—LOG SENSE (4Dh)
8.3.5 ELEMENT STATISTICS PAGE (PAGE CODE 33h)
The Element Statistics page returns cumulative statistics, such as the total
number of puts to the element, the total number of times the autoloader had
to retry a put operation to the element, and the total number of times the
autoloader had to retry a pick operation to the element. These values are
stored in nonvolatile RAM for each element.
The value that you specify for the Parameter Pointer field of the CDB (bytes 05
and 06) determines the value that the autoloader returns in the Parameter
Code field of the Element Statistics page. This value specifies the first element
(starting Element Address) for which information is returned.
An Element Statistics page is returned for all subsequent elements (in
ascending element address order) until the allocation length specified in the
CDB has been reached or all element information has been sent. Element
addresses can be changed with the MODE SELECT command.
Note: The Parameter Pointer specified in the CDB indicates the starting element
address and must be a valid element address for the autoloader.
Parameter Code – Bytes 00 and 01
The Parameter Code field indicates the element address for which statistical
information is being provided. The element address may have been set by the
MODE SELECT command.
Parameter Length – Byte 03
The Parameter Length field indicates the number of bytes that follow this field
on the Element Statistics page.
Bit
Byte
7 6 5 4 3 2 1 0
00 (MSB)
Parameter Code
(Element Address)
(LSB)
01
02 01000000
03 Parameter Length (8h)
04
Tot al Put s
...
07
08
Total Put Retries
09
10
Total Pick Retries
11