1.. SPDX-License-Identifier: GPL-2.0
2
3Kernel driver drivetemp
4=======================
5
6
7References
8----------
9
10ANS T13/1699-D
11Information technology - AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
12
13ANS Project T10/BSR INCITS 513
14Information technology - SCSI Primary Commands - 4 (SPC-4)
15
16ANS Project INCITS 557
17Information technology - SCSI / ATA Translation - 5 (SAT-5)
18
19
20Description
21-----------
22
23This driver supports reporting the temperature of disk and solid state
24drives with temperature sensors.
25
26If supported, it uses the ATA SCT Command Transport feature to read
27the current drive temperature and, if available, temperature limits
28as well as historic minimum and maximum temperatures. If SCT Command
29Transport is not supported, the driver uses SMART attributes to read
30the drive temperature.
31
32
33Sysfs entries
34-------------
35
36Only the temp1_input attribute is always available. Other attributes are
37available only if reported by the drive. All temperatures are reported in
38milli-degrees Celsius.
39
40=======================	=====================================================
41temp1_input		Current drive temperature
42temp1_lcrit		Minimum temperature limit. Operating the device below
43			this temperature may cause physical damage to the
44			device.
45temp1_min		Minimum recommended continuous operating limit
46temp1_max		Maximum recommended continuous operating temperature
47temp1_crit		Maximum temperature limit. Operating the device above
48			this temperature may cause physical damage to the
49			device.
50temp1_lowest		Minimum temperature seen this power cycle
51temp1_highest		Maximum temperature seen this power cycle
52=======================	=====================================================
53