Control Extension Page (0Ah); Tape Alert Page (1Ch) - Dell PowerVault TL2000 Reference Manual

Parity:
By means of this field the host can enable parity retires. Parity retries are by factory default
enabled by the media changer. When cleared parity retries are disabled.
Maximum Parity retries:
This field indicates the maximum number of retries performed on a parity error during data out,
data in, and message out phase. The number of parity retries is by factory default set to 4. The
maximum value allowed in the parity retry field is 7.

Control Extension page (0Ah)

By means of this page the host can control SCSI features provided by the media changer.
Bit 7
Byte
0 Reserved
1
2 (MSB)
3
4
5
6 - 31
Field descriptions:
SPF: The Sub Page Format (SPF) bit is set to one to indicate this is a subpage.
TCMOS:
A TCMOS bit set to zero specifies that the timestamp shall not be changed by any method except
those defined by this standard.
SCSIP:
A SCSI precedence (SCSIP) bit set to one specifies that the timestamp changed using a SET
TIMESTAMP command shall take precedence over any other methods.
IALUAE:
The implicit asymmetric logical unit access enabled (IALUAE) bit must be set to zero. The media
changer does not allow implicit asymmetric logical unit access state changes.

Tape Alert Page (1Ch)

By means of this page the Host can specify the method of reporting Tape Alert events. Currently only the
polling method is supported.
Bit 7
Byte
0 Reserved
1
2 Perf (0)
3
4 - 7
8 - 11
6 5
SPF (1)
Reserved
Reserved
6 5
SPF (0)
Additional Page Length (0Ah)
Reserved
Reserved
Report Count / Test Flag Number
4 3
Page Code (0Ah)
Subpage code (31h)
Page Length (1Ch)
Reserved
4 3
Page Code (1Ch)
Dexcpt
Internal Timer
Chapter 3. Supported SCSI Commands
2 1
TCMOS SCSIP
Initial Priority
2 1
Test (0) Reserved
MRIE (0)
0
(LSB)
IALUAE
0
LogErr
3-23