Maxtor 10K III User Manual
SCSI Description
5-50
Maxtor Atlas 10K III
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The Disconnect–Reconnect Page provides the application client the means to attempt
to optimize the performance of the delivery subsystem. The data format and field
descriptions are described in Table 5-66 and Table 5-67.
to optimize the performance of the delivery subsystem. The data format and field
descriptions are described in Table 5-66 and Table 5-67.
Table 5-66
Disconnect–Reconnect Page (Page 2)
Table 5-67
Disconnect-Reconnect-Field Descriptions (Page 2)
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0
PS
Rsvd
Page Code (02h)
1
Page Length (0Eh)
2
Buffer Full Ratio
3
Buffer Empty Ratio
4 – 5
Bus Inactivity Limit
6 – 7
Disconnect Time Limit
8 – 9
Connect Time Limit
10 – 11
Maximum Burst Size
12
EMDP
Fairness Arbitration
DImm
DTDC
13 Reserved
14 – 15
First Burst Size
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PS
0
Parameters Savable. This bit is only used with the MODE SENSE com-
mand. A returned value of 1 indicates that the target is capable of sav-
ing the page in a non-volatile, vendor-specific location. The bit is
reserved with the MODE SELECT command.
mand. A returned value of 1 indicates that the target is capable of sav-
ing the page in a non-volatile, vendor-specific location. The bit is
reserved with the MODE SELECT command.
Buffer Full
Ratio
0
The Buffer Full Ratio indicates how full the buffer should be prior to re-
questing an interconnect tenancy. Applies to READ operations only.
The default of 0 indicates to the drive that it should use its default ratio.
questing an interconnect tenancy. Applies to READ operations only.
The default of 0 indicates to the drive that it should use its default ratio.
Buffer Empty
Ratio
0
The Buffer Empty Ratio indicates how full the buffer should be prior to
requesting an interconnect tenancy. Applies to READ operations only.
The default of 0 indicates to the drive that it should use its default ratio.
requesting an interconnect tenancy. Applies to READ operations only.
The default of 0 indicates to the drive that it should use its default ratio.
Bus Inactivity
Limit
0
The Bus Inactivity Limit indicates the maximum duration of any inter-
connect tenancy during which no data is transferred.
connect tenancy during which no data is transferred.
Disconnect
Time Limit
0
The Disconnect Time Limit specifies the minimum time, in 100 micro-
second increments, that the drive waits after releasing the SCSI bus be-
fore reselecting. The drive supports a maximum value of 0xFF. Values
greater than 0xFF are treated as 0xFF. The default value of 0 indicates
that the drive can reslect immediately after releasing the bus.
second increments, that the drive waits after releasing the SCSI bus be-
fore reselecting. The drive supports a maximum value of 0xFF. Values
greater than 0xFF are treated as 0xFF. The default value of 0 indicates
that the drive can reslect immediately after releasing the bus.
Connect Time
Limit
0
The Connect Time Limit indicates the maximum duration of a single in-
terconnect tenancy.
terconnect tenancy.
Maximum
Burst Size
0
The Maximum Burst Size
specifies the maximum amount of data that the drive will transfer dur-
ing a data phase before disconnecting from the bus, assuming it was
given the disconnect privilege. This value is expressed in increments of
data sectors (that is, a value of 1 indicates 512 bytes, a value of 2 in-
dicates 1024 bytes). The default value of 0 indicates that there is no
limit on the amount of data transferred per connection.
specifies the maximum amount of data that the drive will transfer dur-
ing a data phase before disconnecting from the bus, assuming it was
given the disconnect privilege. This value is expressed in increments of
data sectors (that is, a value of 1 indicates 512 bytes, a value of 2 in-
dicates 1024 bytes). The default value of 0 indicates that there is no
limit on the amount of data transferred per connection.