1 What: /sys/class/ata_*
2 Description:
3 Provide a place in sysfs for s
4 system. This allows retrieving
5 objects.
6
7 Files under /sys/class/ata_port
8 -------------------------------
9
10 For each port, a directory ataX is created whe
11 port. The device parent is the ata host device
12
13
14 What: /sys/class/ata_port/ataX/nr_pm
15 What: /sys/class/ata_port/ataX/idle_
16 Date: May, 2010
17 KernelVersion: v2.6.37
18 Contact: Gwendal Grignou <gwendal@chromi
19 Description:
20 nr_pmp_links: (RO) If a SATA
21 connected, the
22
23 idle_irq: (RO) Number of
24 idle [some ata
25
26
27 What: /sys/class/ata_port/ataX/port_
28 Date: May, 2013
29 KernelVersion: v3.11
30 Contact: Gwendal Grignou <gwendal@chromi
31 Description:
32 (RO) Host local port number. W
33 port numbers are tracked based
34 the controller. This attribute
35 persistent links in /dev/disk/
36
37 Files under /sys/class/ata_link
38 -------------------------------
39
40 Behind each port, there is a ata_link. If ther
41 ata_link objects are created.
42
43 If a link is behind a port, the directory name
44 of the port. If a link is behind a PM, its nam
45 ata_port_id of the parent port and Y the PM po
46
47
48 What: /sys/class/ata_link/linkX[.Y]/
49 What: /sys/class/ata_link/linkX[.Y]/
50 What: /sys/class/ata_link/linkX[.Y]/
51 Date: May, 2010
52 KernelVersion: v2.6.37
53 Contact: Gwendal Grignou <gwendal@chromi
54 Description:
55 hw_sata_spd_limit: (RO) M
56 connec
57
58 sata_spd_limit: (RO) M
59
60 sata_spd: (RO) C
61 eg. 1.
62
63
64 Files under /sys/class/ata_device
65 ---------------------------------
66
67 Behind each link, up to two ata devices are cr
68 The name of the directory is devX[.Y].Z where:
69 - X is ata_port_id of the port where the devic
70 - Y the port of the PM if any, and
71 - Z the device id: for PATA, there is usually
72
73
74 What: /sys/class/ata_device/devX[.Y]
75 What: /sys/class/ata_device/devX[.Y]
76 What: /sys/class/ata_device/devX[.Y]
77 What: /sys/class/ata_device/devX[.Y]
78 What: /sys/class/ata_device/devX[.Y]
79 What: /sys/class/ata_device/devX[.Y]
80 What: /sys/class/ata_device/devX[.Y]
81 What: /sys/class/ata_device/devX[.Y]
82 Date: May, 2010
83 KernelVersion: v2.6.37
84 Contact: Gwendal Grignou <gwendal@chromi
85 Description:
86 spdn_cnt: (RO) Number of
87 speed of link
88
89 gscr: (RO) Cached re
90 register. Vali
91
92 0: SATA_P
93 1: SATA_P
94 2: SATA_P
95 32: SATA_P
96 33: SATA_P
97 64: SATA_P
98 96: SATA_P
99 130: SATA_P
100
101 Only valid if
102
103 ering: (RO) Formatted
104 device.
105
106 id: (RO) Cached re
107 described in A
108 the device is
109
110 pio_mode: (RO) PIO trans
111 Mostly used by
112
113 xfer_mode: (RO) Current t
114 PATA devices.
115
116 dma_mode: (RO) DMA trans
117 Mostly used by
118
119 class: (RO) Device cl
120 "atapi" for pa
121 "none" if no d
122
123
124 What: /sys/class/ata_device/devX[.Y]
125 Date: May, 2015
126 KernelVersion: v4.10
127 Contact: Gwendal Grignou <gwendal@chromi
128 Description:
129 (RO) Shows the DSM TRIM mode c
130 values are:
131
132 unsupported: Drive
133
134 unqueued: Drive
135
136 queued: Drive
137
138 forced_unqueued: Drive'
139 be bug
140 are se
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