1 .. SPDX-License-Identifier: GPL-2.0
2
3 Kernel driver drivetemp
4 =======================
5
6
7 References
8 ----------
9
10 ANS T13/1699-D
11 Information technology - AT Attachment 8 - ATA
12
13 ANS Project T10/BSR INCITS 513
14 Information technology - SCSI Primary Commands
15
16 ANS Project INCITS 557
17 Information technology - SCSI / ATA Translatio
18
19
20 Description
21 -----------
22
23 This driver supports reporting the temperature
24 drives with temperature sensors.
25
26 If supported, it uses the ATA SCT Command Tran
27 the current drive temperature and, if availabl
28 as well as historic minimum and maximum temper
29 Transport is not supported, the driver uses SM
30 the drive temperature.
31
32
33 Usage Note
34 ----------
35
36 Reading the drive temperature may reset the sp
37 This has been observed with WD120EFAX drives,
38 drives as well. The same behavior is observed
39 tools are used to access the drive.
40 With the WD120EFAX drive, reading the drive te
41 driver is still possible _after_ it transition
42 reading the drive temperature in this mode wil
43 change its mode (meaning the drive will not sp
44 drives experience similar behavior.
45
46 A known workaround for WD120EFAX drives is to
47 intervals larger than twice the spin-down time
48 will never spin down.
49
50
51 Sysfs entries
52 -------------
53
54 Only the temp1_input attribute is always avail
55 available only if reported by the drive. All t
56 milli-degrees Celsius.
57
58 ======================= ======================
59 temp1_input Current drive temperat
60 temp1_lcrit Minimum temperature li
61 this temperature may c
62 device.
63 temp1_min Minimum recommended co
64 temp1_max Maximum recommended co
65 temp1_crit Maximum temperature li
66 this temperature may c
67 device.
68 temp1_lowest Minimum temperature se
69 temp1_highest Maximum temperature se
70 ======================= ======================
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