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