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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | What: /sys/class/ata_* Description: Provide a place in sysfs for storing the ATA topology of the system. This allows retrieving various information about ATA objects. Files under /sys/class/ata_port ------------------------------- For each port, a directory ataX is created where X is the ata_port_id of the port. The device parent is the ata host device. What: /sys/class/ata_port/ataX/nr_pmp_links What: /sys/class/ata_port/ataX/idle_irq Date: May, 2010 KernelVersion: v2.6.37 Contact: Gwendal Grignou <gwendal@chromium.org> Description: nr_pmp_links: (RO) If a SATA Port Multiplier (PM) is connected, the number of links behind it. idle_irq: (RO) Number of IRQ received by the port while idle [some ata HBA only]. What: /sys/class/ata_port/ataX/port_no Date: May, 2013 KernelVersion: v3.11 Contact: Gwendal Grignou <gwendal@chromium.org> Description: (RO) Host local port number. While registering host controller, port numbers are tracked based upon number of ports available on the controller. This attribute is needed by udev for composing persistent links in /dev/disk/by-path. Files under /sys/class/ata_link ------------------------------- Behind each port, there is a ata_link. If there is a SATA PM in the topology, 15 ata_link objects are created. If a link is behind a port, the directory name is linkX, where X is ata_port_id of the port. If a link is behind a PM, its name is linkX.Y where X is ata_port_id of the parent port and Y the PM port. What: /sys/class/ata_link/linkX[.Y]/hw_sata_spd_limit What: /sys/class/ata_link/linkX[.Y]/sata_spd_limit What: /sys/class/ata_link/linkX[.Y]/sata_spd Date: May, 2010 KernelVersion: v2.6.37 Contact: Gwendal Grignou <gwendal@chromium.org> Description: hw_sata_spd_limit: (RO) Maximum speed supported by the connected SATA device. sata_spd_limit: (RO) Maximum speed imposed by libata. sata_spd: (RO) Current speed of the link eg. 1.5, 3 Gbps etc. Files under /sys/class/ata_device --------------------------------- Behind each link, up to two ata devices are created. The name of the directory is devX[.Y].Z where: - X is ata_port_id of the port where the device is connected, - Y the port of the PM if any, and - Z the device id: for PATA, there is usually 2 devices [0,1], only 1 for SATA. What: /sys/class/ata_device/devX[.Y].Z/spdn_cnt What: /sys/class/ata_device/devX[.Y].Z/gscr What: /sys/class/ata_device/devX[.Y].Z/ering What: /sys/class/ata_device/devX[.Y].Z/id What: /sys/class/ata_device/devX[.Y].Z/pio_mode What: /sys/class/ata_device/devX[.Y].Z/xfer_mode What: /sys/class/ata_device/devX[.Y].Z/dma_mode What: /sys/class/ata_device/devX[.Y].Z/class Date: May, 2010 KernelVersion: v2.6.37 Contact: Gwendal Grignou <gwendal@chromium.org> Description: spdn_cnt: (RO) Number of times libata decided to lower the speed of link due to errors. gscr: (RO) Cached result of the dump of PM GSCR register. Valid registers are: 0: SATA_PMP_GSCR_PROD_ID, 1: SATA_PMP_GSCR_REV, 2: SATA_PMP_GSCR_PORT_INFO, 32: SATA_PMP_GSCR_ERROR, 33: SATA_PMP_GSCR_ERROR_EN, 64: SATA_PMP_GSCR_FEAT, 96: SATA_PMP_GSCR_FEAT_EN, 130: SATA_PMP_GSCR_SII_GPIO Only valid if the device is a PM. ering: (RO) Formatted output of the error ring of the device. id: (RO) Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17. Only valid if the device is not a PM. pio_mode: (RO) PIO transfer mode used by the device. Mostly used by PATA devices. xfer_mode: (RO) Current transfer mode. Mostly used by PATA devices. dma_mode: (RO) DMA transfer mode used by the device. Mostly used by PATA devices. class: (RO) Device class. Can be "ata" for disk, "atapi" for packet device, "pmp" for PM, or "none" if no device was found behind the link. What: /sys/class/ata_device/devX[.Y].Z/trim Date: May, 2015 KernelVersion: v4.10 Contact: Gwendal Grignou <gwendal@chromium.org> Description: (RO) Shows the DSM TRIM mode currently used by the device. Valid values are: unsupported: Drive does not support DSM TRIM unqueued: Drive supports unqueued DSM TRIM only queued: Drive supports queued DSM TRIM forced_unqueued: Drive's queued DSM support is known to be buggy and only unqueued TRIM commands are sent |