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What is 'Number of Transmit Descriptors'??

Tom Lyczko
Super Advisor

What is 'Number of Transmit Descriptors'??

I received an alert about this item when setting up a recovery CD for Symantec Backup Exec System Recovery on our ML350 G3 servers.

What is 'Number of Transmit Descriptors'??
Does this require a driver??

Thank you, tom
Honored Contributor

Re: What is 'Number of Transmit Descriptors'??


it doesn't require a driver
More info - check :

"Transmit Descriptors defines the number of Transmit Descriptors, which are data segments that enable the adapter to track transmit packets in the system memory. Depending on the size of the packet, each transmit packet requires one or more Transmit Descriptors.

You might choose to increase the number of Transmit Descriptors if you notice a possible problem with transmit performance. Although increasing the number of Transmit Descriptors can enhance transmit performance, Transmit Descriptors do consume system memory. If transmit performance is not an issue, use the default setting of 512"

From the adapter proerties -> TxDescriptors
either windows or NCU you can change this setting.

page 30 :

Number of Transmit Descriptors: Minimum/Maximum. Specifies the number of descriptors to allocate
per Transmit Control Block (TCB). This value directly affects the number of map registers allocated for
the adapter (the higher the number, the more map registers are allocated).