FCP Error Recovery field
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Whether
the system uses FCP Sequence Level Error Recovery (FC-TAPE) protocol for
sequence level error recovery with tape devices. This enables or disables the
Read Exchange Concise (REC) and Sequence Retransmission Request (SRR) functions
on the VIC firmware. This can be one of the following:
Note
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This
parameter only applies to a server with a Virtual Interface Card (VIC) adapter,
such as the
Cisco UCS M81KR Virtual Interface Card.
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Flogi Retries field
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The
number of times that the system tries to log in to the fabric after the first
failure.
Enter
any integer. To specify that the system continue to try indefinitely, enter
infinite in this field. We recommend you consult
your storage array documentation for the optimal value for this parameter.
Note
|
This
parameter only applies to a server with a VIC adapter, or a converged network
adapter such as the
Cisco
UCS M71KR-E Emulex Converged Network Adapter.
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Flogi Timeout field
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The
number of milliseconds that the system waits before it tries to log in again.
Enter an
integer between 1000 and 255000. The default is 4,000. We recommend you consult
your storage array documentation for the optimal value for this parameter.
Note
|
This
parameter only applies to a server with a VIC adapter or a converged network
adapter.
When a
Flogi timeout value of 20 seconds or more is configured for a boot vHBA, it
could lead to a SAN boot failure if the adapter does not receive an accept to
the initial Flogi. For a boot-enabled vHBA, the recommended timeout values is 5
seconds or less.
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Plogi Retries field
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The
number of times that the system tries to log into a port after the first
failure.
Enter an
integer between 0 and 255. The default is 8. We recommend you consult your
storage array documentation for the optimal value for this parameter.
Note
|
This
parameter only applies to a server with a VIC adapter.
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Plogi Timeout field
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The
number of milliseconds that the system waits before it tries to log in again.
Enter an
integer between 1000 and 255000. The default is 20,000. We recommend you
consult your storage array documentation for the optimal value for this
parameter.
For an
HBA that is going to be used to boot a Windows OS from SAN, the recommended
value for this field is 4,000 ms.
Note
|
This
parameter only applies to a server with a VIC adapter.
When a
Plogi timeout value of 20 seconds or more is configured for a boot vHBA, it
could lead to a SAN boot failure if the adapter does not receive an accept to
the initial Plogi. For a boot-enabled vHBA, the recommended timeout values is 5
seconds or less.
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Error Detect Timeout field
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The
number of milliseconds to wait before the system assumes that an error has
occurred.
This
value cannot be changed.
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Port Down Timeout field
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The
number of milliseconds a remote Fibre Channel port should be offline before
informing the SCSI upper layer that the port is unavailable. This parameter is
important for host multi-pathing drivers and it is one of the key indicators
used for error processing.
Enter an
integer between 0 and 240000. The default is 30,000. For a server with a VIC
adapter running ESX, the recommended value is 10,000.
For a
server with a port that is going to be used to boot a Windows OS from SAN, the
recommended value for this field is 5000 milliseconds.
We
recommend you consult your storage array documentation for the optimal value
for this parameter.
Note
|
This
parameter only applies to a server with a VIC adapter.
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IO Retry Timeout (seconds)
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The number of seconds that the FC adapter waits before
aborting the pending command and resending the same IO. This happens when the
network device does not responding to an IO request within the specified time.
Enter an integer between 0 and 59 seconds. The default IO
retry timeout is 5 seconds.
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Port Down IO Retry field
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The
number of times an IO request to a port is returned because the port is busy
before the system decides the port is unavailable.
Enter an
integer between 0 and 255. The default is 8. We recommend you consult your
storage array documentation for the optimal value for this parameter.
Note
|
This
parameter only applies to a server with a VIC adapter running Windows.
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Link Down Timeout field
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The
number of milliseconds the uplink port should be offline before it informs the
system that the uplink port is down and fabric connectivity has been lost.
Enter an
integer between 0 and 240000. The default is 30,000. We recommend you consult
your storage array documentation for the optimal value for this parameter.
Note
|
This
parameter only applies to a server with a VIC adapter running Windows.
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Resource Allocation Timeout field
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The
number of milliseconds to wait before the system assumes that a resource cannot
be properly allocated.
This
value cannot be changed.
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IO Throttle Count field
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The
maximum number of data or control I/O operations that can be pending in the
vHBA at one time. If this value is exceeded, the additional I/O operations wait
in the queue until the number of pending I/O operations decreases and the
additional operations can be processed.
Note
|
This
parameter is not the same as the LUN queue depth, which is controlled by
Cisco UCS Manager based on the operating system installed on the server.
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Enter an
integer between 256 and 1024. The default is 256. We recommend you consult your
storage array documentation for the optimal value for this parameter.
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Max LUNs Per Target field
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The
maximum number of LUNs that the Fibre Channel driver will export or show. The
maximum number of LUNs is usually controlled by the operating system running on
the server.
Enter an
integer between 1 and 1024. The default value is 256. For servers running ESX
or Linux, the recommended value is 1024.
We
recommend you consult your operating system documentation for the optimal value
for this parameter.
Note
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This
parameter only applies to a server with a VIC adapter or a network adapter.
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LUN Queue Depth
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The number of commands that the HBA can send and receive in
a single transmission per LUN.
Enter an integer between 1 and 254. The default LUN queue
depth is 20.
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Interrupt Mode field
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The
method used to send interrupts to the operating system from the driver. This
can be one of the following:
Note
|
This
parameter only applies to a server with a VIC adapter or a network adapter
running an operating system other than Windows. The Windows operating system
ignores this parameter.
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