Q-Logic Comprehensive Guide to NPIV Deployment in VMware ESX/ESXi 4.0

		3–Configuration
	Deploying NPIV for VMware ESX/ESXi 4.0
Table 3-1. Configurable Driver Parameters (Continued)
Driver Parameter	Description
ql2xloginretrycount	Option to modify the login retry count.
ql2xlogintimeout	Login timeout value in seconds. Default is 20.
ql2xmaxqdepth	Maximum queue depth to report for target devices. Default is
	32.
ql2xmaxsgs	Maximum scatter or gather entries per I/O request. Default is
	32.
ql2xoperationmode	Option to enable operation mode for 2Gb or 4Gb Fibre Channel
	Adapters. For 2Gb Fibre Channel Adapters, set to 0x5 to
	enable zero input output (ZIO) mode. For 4Gb Fibre Channel
	Adapters, set to 0x5/0x6 to enable ZIO mode.
ql2xplogiabsentdevice	Option to enable PLOGI (port login) to devices that are not pres-
	ent after a fabric scan. This workaround is required for some
	Fibre Channel switch defects. 0 = no PLOGI (default); 1 = per-
	form PLOGI.
ql2xqfullrampup	Number of seconds to wait to begin to ramp-up the queue depth
	for a device after a queue-full condition has been detected.
	Default is 120 seconds.
ql2xusedefmaxrdreq	Option to adjust PCIe™ Maximum Read Request Size. 1 =
	use system default; 0 = default.
ql2xusedrivernaming	Enables Consistent Device Naming feature. Default is 0 = dis-
	abled, 1 = enabled.
	Maximum number of command retries to a port that returns
	PORT-DOWNstatus. Default is 15. (This parameter is multiplied
	by a factor of 2 to determine the number of seconds driver holds
qlport_down_retry a	the I/O request.)

Table Footnotes

aThis parameter determines how long the driver will internally queue I/O before returning the DID_NO_CONNECT status to the SCSI mid layer.

Deploying NPIV for VMware ESX/ESXi 4.0

QLogic Fibre Channel and Converged Network Adapters support N_Port ID virtualization (NPIV) for Fibre Channel and FCoE SANs. NPIV enables each virtual machine to have its own Fibre Channel-FCoE world wide port name (WWPN) by creating multiple virtual adapters on a single physical adapter.

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