13a7bda83SDave JiangWhat:		/sys/class/scsi_host/hostX/isci_id
23a7bda83SDave JiangDate:		June 2011
33a7bda83SDave JiangContact:	Dave Jiang <dave.jiang@intel.com>
43a7bda83SDave JiangDescription:
53a7bda83SDave Jiang		This file contains the enumerated host ID for the Intel
63a7bda83SDave Jiang		SCU controller. The Intel(R) C600 Series Chipset SATA/SAS
73a7bda83SDave Jiang		Storage Control Unit embeds up to two 4-port controllers in
83a7bda83SDave Jiang		a single PCI device.  The controllers are enumerated in order
93a7bda83SDave Jiang		which usually means the lowest number scsi_host corresponds
103a7bda83SDave Jiang		with the first controller, but this association is not
113a7bda83SDave Jiang		guaranteed.  The 'isci_id' attribute unambiguously identifies
123a7bda83SDave Jiang		the controller index: '0' for the first controller,
133a7bda83SDave Jiang		'1' for the second.
14da0697bdSScott Teel
15da0697bdSScott TeelWhat:		/sys/class/scsi_host/hostX/acciopath_status
16da0697bdSScott TeelDate:		November 2013
17da0697bdSScott TeelContact:	Stephen M. Cameron <scameron@beardog.cce.hp.com>
18da0697bdSScott TeelDescription:	This file contains the current status of the "SSD Smart Path"
19da0697bdSScott Teel		feature of HP Smart Array RAID controllers using the hpsa
20da0697bdSScott Teel		driver.  SSD Smart Path, when enabled permits the driver to
21da0697bdSScott Teel		send i/o requests directly to physical devices that are part
22da0697bdSScott Teel		of a logical drive, bypassing the controllers firmware RAID
23da0697bdSScott Teel		stack for a performance advantage when possible.  A value of
24da0697bdSScott Teel		'1' indicates the feature is enabled, and the controller may
25da0697bdSScott Teel		use the direct i/o path to physical devices.  A value of zero
26da0697bdSScott Teel		means the feature is disabled and the controller may not use
27da0697bdSScott Teel		the direct i/o path to physical devices.  This setting is
28da0697bdSScott Teel		controller wide, affecting all configured logical drives on the
29da0697bdSScott Teel		controller.  This file is readable and writable.
30