Documentation/ABI/testing/sysfs-class-scsi_host

   1 What:           /sys/class/scsi_host/hostX/isci_id
   2 Date:           June 2011
   3 Contact:        Dave Jiang <dave.jiang@intel.com>
   4 Description:
   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
  15 What:           /sys/class/scsi_host/hostX/acciopath_status
  16 Date:           November 2013
  17 Contact:        Stephen M. Cameron <scameron@beardog.cce.hp.com>
  18 Description:    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.