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