| 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. |