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139 lines
4.3 KiB
139 lines
4.3 KiB
What: /sys/class/ata_... |
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Description: |
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Provide a place in sysfs for storing the ATA topology of the |
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system. This allows retrieving various information about ATA |
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objects. |
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Files under /sys/class/ata_port |
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------------------------------- |
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For each port, a directory ataX is created where X is the ata_port_id of the |
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port. The device parent is the ata host device. |
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What: /sys/class/ata_port/ataX/nr_pmp_links |
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What: /sys/class/ata_port/ataX/idle_irq |
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Date: May, 2010 |
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KernelVersion: v2.6.37 |
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Contact: Gwendal Grignou <[email protected]> |
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Description: |
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nr_pmp_links: (RO) If a SATA Port Multiplier (PM) is |
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connected, the number of links behind it. |
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idle_irq: (RO) Number of IRQ received by the port while |
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idle [some ata HBA only]. |
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What: /sys/class/ata_port/ataX/port_no |
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Date: May, 2013 |
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KernelVersion: v3.11 |
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Contact: Gwendal Grignou <[email protected]> |
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Description: |
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(RO) Host local port number. While registering host controller, |
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port numbers are tracked based upon number of ports available on |
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the controller. This attribute is needed by udev for composing |
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persistent links in /dev/disk/by-path. |
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Files under /sys/class/ata_link |
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------------------------------- |
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Behind each port, there is a ata_link. If there is a SATA PM in the topology, 15 |
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ata_link objects are created. |
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If a link is behind a port, the directory name is linkX, where X is ata_port_id |
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of the port. If a link is behind a PM, its name is linkX.Y where X is |
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ata_port_id of the parent port and Y the PM port. |
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What: /sys/class/ata_link/linkX[.Y]/hw_sata_spd_limit |
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What: /sys/class/ata_link/linkX[.Y]/sata_spd_limit |
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What: /sys/class/ata_link/linkX[.Y]/sata_spd |
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Date: May, 2010 |
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KernelVersion: v2.6.37 |
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Contact: Gwendal Grignou <[email protected]> |
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Description: |
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hw_sata_spd_limit: (RO) Maximum speed supported by the |
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connected SATA device. |
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sata_spd_limit: (RO) Maximum speed imposed by libata. |
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sata_spd: (RO) Current speed of the link |
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eg. 1.5, 3 Gbps etc. |
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Files under /sys/class/ata_device |
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--------------------------------- |
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Behind each link, up to two ata devices are created. |
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The name of the directory is devX[.Y].Z where: |
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- X is ata_port_id of the port where the device is connected, |
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- Y the port of the PM if any, and |
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- Z the device id: for PATA, there is usually 2 devices [0,1], only 1 for SATA. |
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What: /sys/class/ata_device/devX[.Y].Z/spdn_cnt |
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What: /sys/class/ata_device/devX[.Y].Z/gscr |
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What: /sys/class/ata_device/devX[.Y].Z/ering |
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What: /sys/class/ata_device/devX[.Y].Z/id |
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What: /sys/class/ata_device/devX[.Y].Z/pio_mode |
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What: /sys/class/ata_device/devX[.Y].Z/xfer_mode |
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What: /sys/class/ata_device/devX[.Y].Z/dma_mode |
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What: /sys/class/ata_device/devX[.Y].Z/class |
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Date: May, 2010 |
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KernelVersion: v2.6.37 |
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Contact: Gwendal Grignou <[email protected]> |
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Description: |
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spdn_cnt: (RO) Number of times libata decided to lower the |
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speed of link due to errors. |
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gscr: (RO) Cached result of the dump of PM GSCR |
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register. Valid registers are: |
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0: SATA_PMP_GSCR_PROD_ID, |
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1: SATA_PMP_GSCR_REV, |
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2: SATA_PMP_GSCR_PORT_INFO, |
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32: SATA_PMP_GSCR_ERROR, |
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33: SATA_PMP_GSCR_ERROR_EN, |
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64: SATA_PMP_GSCR_FEAT, |
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96: SATA_PMP_GSCR_FEAT_EN, |
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130: SATA_PMP_GSCR_SII_GPIO |
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Only valid if the device is a PM. |
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ering: (RO) Formatted output of the error ring of the |
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device. |
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id: (RO) Cached result of IDENTIFY command, as |
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described in ATA8 7.16 and 7.17. Only valid if |
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the device is not a PM. |
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pio_mode: (RO) Transfer modes supported by the device when |
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in PIO mode. Mostly used by PATA device. |
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xfer_mode: (RO) Current transfer mode |
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dma_mode: (RO) Transfer modes supported by the device when |
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in DMA mode. Mostly used by PATA device. |
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class: (RO) Device class. Can be "ata" for disk, |
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"atapi" for packet device, "pmp" for PM, or |
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"none" if no device was found behind the link. |
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What: /sys/class/ata_device/devX[.Y].Z/trim |
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Date: May, 2015 |
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KernelVersion: v4.10 |
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Contact: Gwendal Grignou <[email protected]> |
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Description: |
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(RO) Shows the DSM TRIM mode currently used by the device. Valid |
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values are: |
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unsupported: Drive does not support DSM TRIM |
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unqueued: Drive supports unqueued DSM TRIM only |
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queued: Drive supports queued DSM TRIM |
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forced_unqueued: Drive's queued DSM support is known to |
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be buggy and only unqueued TRIM commands |
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are sent
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