Tape Alert Flag Structure; Statistics Counter Page (30H) - Dell PowerVault TL2000 Reference Manual

v I = Informational suggestion to user
v W = Warning. Remedial action is advised. Performance of data may be at risk.
v C = Critical immediate remedial action is required.

Tape Alert Flag structure

Bit 7
Byte
0 (MSB)
1
2 DU(0)
3
4
Field descriptions:
Parameter Code:
The Parameter Code is a 2-byte value that uniquely identifies the parameter within the log. It
ranges from 1..64
DU: Disable Update is set for any parameter that the Host cannot reset.
DS: Disable Save. The media changer has no support for SP bit. Set to 1.
TSD: Target shall determine save method.
ETC: No threshold comparison
TMC: No threshold supported
LP: The List Parameter field is set to zero for parameters that are counters and set to one for
parameters that are not counters.

Statistics Counter Page (30h)

This page consists of the Page Header followed three vendor specific counters. The information in this
page is stored in NV-RAM on power shut-down. This page will not be affected by the LOG SELECT
command nor by Firmware updates.
Bit 7
Byte
0 Reserved
1
2 (MSB)
3
4 - 51
Field descriptions:
Page Code:
The Page Code echoes the page code that was specific in the Log Sense CDB.
6 5
(DS(1) TSD(0) ETC(0)
Parameter Length (1)
Value of Flag (Set when bit 0 = 1)
6 5
Page Length (0048h)
9 Statistics Counter structures (72 bytes)
4 3
Parameter Code (n)
TMC(0) Reserved
4 3
Page Code (30h)
Reserved
Chapter 3. Supported SCSI Commands
2 1
Reserved LP(0)
2 1
0
(LSB)
0
(LSB)
3-17