1What: /sys/class/scsi_host/hostX/isci_id 2Date: June 2011 3Contact: Dave Jiang <dave.jiang@intel.com> 4Description: 5 This file contains the enumerated host ID for the Intel 6 SCU controller. The Intel(R) C600 Series Chipset SATA/SAS 7 Storage Control Unit embeds up to two 4-port controllers in 8 a single PCI device. The controllers are enumerated in order 9 which usually means the lowest number scsi_host corresponds 10 with the first controller, but this association is not 11 guaranteed. The 'isci_id' attribute unambiguously identifies 12 the controller index: '0' for the first controller, 13 '1' for the second. 14 15What: /sys/class/scsi_host/hostX/acciopath_status 16Date: November 2013 17Contact: Stephen M. Cameron <scameron@beardog.cce.hp.com> 18Description: This file contains the current status of the "SSD Smart Path" 19 feature of HP Smart Array RAID controllers using the hpsa 20 driver. SSD Smart Path, when enabled permits the driver to 21 send i/o requests directly to physical devices that are part 22 of a logical drive, bypassing the controllers firmware RAID 23 stack for a performance advantage when possible. A value of 24 '1' indicates the feature is enabled, and the controller may 25 use the direct i/o path to physical devices. A value of zero 26 means the feature is disabled and the controller may not use 27 the direct i/o path to physical devices. This setting is 28 controller wide, affecting all configured logical drives on the 29 controller. This file is readable and writable. 30