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TWE(4)		       FreeBSD Kernel Interfaces Manual			TWE(4)

NAME
     twe -- 3ware Escalade ATA RAID adapter driver

SYNOPSIS
     device pci
     device twe

DESCRIPTION
     The twe driver provides support for the Escalade 3W-5x00 and 3W-6x00
     series of ATA RAID	controllers.  These devices support 2, 4 or 8 ATA disk
     drives and	provide	RAID0 (striping) and RAID1 (mirroring) functionality.

DIAGNOSTICS
   Controller initialisation phase
     twe%d: microcontroller not	ready

     The controller's onboard CPU is not reporting that	it is ready; this may
     be	due to either a	board or system	failure.  Initialisation has failed.

     twe%d: no attention interrupt
     twe%d: can't drain	AEN queue
     twe%d: reset not reported
     twe%d: controller errors detected
     twe%d: can't drain	response queue
     twe%d: reset %d failed, trying again

     The controller is not responding correctly	to the driver's	attempts to
     reset and initialise it.  This process is retried several times.

     twe%d: can't initialise controller, giving	up

     Several attempts to reset and initialise the controller have failed; ini-
     tialisation has failed and	the driver will	not attach to this controller.

   Driver initialisation/shutdown phase
     twe%d: register window not	available
     twe%d: can't allocate register window
     twe%d: can't allocate parent DMA tag
     twe%d: can't allocate interrupt
     twe%d: can't set up interrupt
     twe%d: can't establish configuration hook

     A resource	allocation error occurred while	initialising the driver; ini-
     tialisation has failed and	the driver will	not attach to this controller.

     twe%d: can't detect attached units

     Fetching the list of attached units failed; initialisation	has failed.

     twe%d: error fetching capacity for	unit %d
     twe%d: error fetching state for unit %d
     twe%d: error fetching descriptor size for unit %d
     twe%d: error fetching descriptor for unit %d
     twe%d: device_add_child failed
     twe%d: bus_generic_attach returned	%d

     Creation of the disk devices failed, either due to	communications prob-
     lems with the adapter or due to resource shortage;	attachment of one or
     more units	may have been aborted.

   Operational phase
     twe%d: command completed -	%s

     A command was reported completed with a warning by	the controller.	 The
     warning may be one	of:

     redundant/inconsequential request ignored
     failed to write zeroes to LBA 0
     failed to profile TwinStor	zones

     twe%d: command failed - %s

     A command was reported as failed by the controller.  The failure message
     may be one	of:

     aborted due to system command or reconfiguration
     aborted
     access error
     access violation
     device failure
     controller	error
     timed out
     invalid unit number
     unit not available
     undefined opcode
     request incompatible with unit
     invalid request
     firmware error, reset requested

     The command will be returned to the operating system after	a fatal	error.

     twe%d: command failed submission -	controller wedged

     A command could not be delivered to the controller	because	the controller
     is	unresponsive.

     twe%d: AEN: <%s>

     The controller has	reported a change in status using an AEN (Asynchronous
     Event Notification).  The following AENs may be reported:

     queue empty
     soft reset
     degraded mirror
     controller	error
     rebuild fail
     rebuild done
     incomplete	unit
     initialisation done
     unclean shutdown detected
     drive timeout
     drive error
     rebuild started
     aen queue full

     AENs are also queued internally for use by	management tools.

     twe%d: error polling for signalled	AENs

     The controller has	reported that one or more status messages are ready
     for the driver, but attempting to fetch one of these has returned an
     error.

     twe%d: AEN	queue overflow,	lost AEN <%s>

     A status message was retrieved from the controller, but there is no more
     room to queue it in the driver.  The message is lost (but will be printed
     to	the console).

     twe%d: missing expected status bits %s
     twe%d: unexpected status bits %s

     A check of	the controller's status	bits indicates an unexpected condi-
     tion.

     twe%d: host interrupt

     The controller has	signalled a host interrupt.  This serves an unknown
     purpose and is ignored.

     twe%d: command interrupt

     The controller has	signalled a command interrupt.	This is	not used, and
     will be disabled.

     twe%d: controller reset in	progress...

     The controller is being reset by the driver.  Typically this is done when
     the driver	has determined that the	controller is in an unrecoverable
     state.

     twe%d: can't reset	controller, giving up

     The driver	has given up on	resetting the controller.  No further I/O will
     be	handled.

     controller	reset done, %d commands	restarted

     The controller was	successfully reset, and	outstanding commands were
     restarted.

BUGS
     The controller cannot handle I/O transfers	that are not aligned to	a
     512-byte boundary.	 In order to support raw device	access from user-
     space, the	driver will perform alignment fixup on non-aligned data.  This
     process is	inefficient, and thus in order to obtain best performance
     user-space	applications accessing the device should do so with aligned
     buffers.

AUTHORS
     The twe driver and	manpage	were written by	Michael	Smith
     <msmith@FreeBSD.org>.

FreeBSD	9.3			April 10, 2000			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | BUGS | AUTHORS

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<http://www.freebsd.org/cgi/man.cgi?query=twe&sektion=4&manpath=FreeBSD+4.7-RELEASE>

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