SCSI Commands: 22BMODE SELECT
Page
86
The SAS Disconnect/Reconnect Mode Page parameters are listed below.
Field Bytes
Bits
Description
Page Code
0
0-5
Always 02h, indicating the Disconnect/Reconnect Page
Additional
Page Length
1
Always 0Eh, indicating that 14 parameter bytes follow the Page
Length byte.
Buffer Full
Ratio
2
Not supported, must be set to zero
Buffer Empty
Ratio
3
Not supported, must be set to zero
Bus Inactivity
Time Limit
4-5 The maximum time that the drive will maintain an interconnect
tenancy without a data or information transfer, measured in
transmission word increments.
A value of zero indicates that there is no bus inactivity limit.
Disconnect
Time Limit
6-7
Not supported, must be set to zero
Maximum
Connect
Time Limit
8-9 The maximum duration of a single interconnect tenancy in
increments of 128 transmission words. If the connect time limit is
exceeded the drive concludes the interconnect tenancy, within the
restrictions placed on it by the applicable Fibre Channel
configuration.
A value of zero indicates there is no connect time limit.
Maximum
Burst Size
10-11
The maximum size of all bytes in a FCP_DATA_IU that the drive will
transfer to the initiator or request from the initiator. This is not the
amount of data transferred in a single interconnect tenancy. The
value is expressed in increments of 512 bytes.
A value of zero indicates there is no limit on the amount of data
transferred per data transfer operation.
The maximum value for this field is 400h.
Note that attempting to set Maximum Burst Size to a value greater
than supported by the drive will return check condition with sense
RECOVERED ERROR; ROUNDED PARAMETER.
Enable
Modify Data
Pointers
12
7
Not supported, must be set to zero
Fairness
Access A
12
6
Not supported, must be set to zero
Fairness
Access B
12
5
Not supported, must be set to zero
Fairness
Access C
12
4
Not supported, must be set to zero
First Burst
Size
14-15
Not supported, must be set to zero
Reserved
All reserved bits must be 0.
Summary of Contents for LTO 4
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