smp_discover man page on Fedora
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SMP_DISCOVER(8) SMP_UTILS SMP_DISCOVER(8)
NAME
smp_discover - invoke DISCOVER SMP function
SYNOPSIS
smp_discover [--adn] [--brief] [--help] [--hex] [--ignore] [--inter‐
face=PARAMS] [--list] [--multiple] [--my] [--num=NUM] [--phy=ID]
[--raw] [--sa=SAS_ADDR] [--summary] [--verbose] [--version] [--zero]
SMP_DEVICE[,N]
DESCRIPTION
Sends one or more SAS Management Protocol (SMP) DISCOVER function
requests to a SMP target and decodes or outputs the responses. The SMP
target is identified by the SMP_DEVICE and the SAS_ADDR. Depending on
the interface, the SAS_ADDR may be deduced from the SMP_DEVICE. The
mpt interface uses SMP_DEVICE to identify a HBA (an SMP initiator) and
needs the additional ,N to differentiate between HBAs if there are mul‐
tiple present.
If the --phy=ID option is not given then --summary is assumed. When
--summary is given or assumed, this utility shows the disposition of
each active expander phy in table form. One row is shown for each phy
and is described in the SINGLE LINE PER PHY FORMAT section below. For
this purpose disabled and errored expander phys are considered "active"
and can be suppressed from the output by adding the --brief option.
OPTIONS
Mandatory arguments to long options are mandatory for short options as
well.
-A, --adn
causes the "attached device name" field to be output when the
--multiple or --summary option is also given. See the section
below on SINGLE LINE PER PHY FORMAT. Note the "attached device
name" field was added is SAS-2.
-b, --brief
reduce the decoded response output. If used twice will exit if
there is no attached device (after outputting that). When used
with --multiple, unattached phys are not listed; when used
twice, trims attached phys output.
-h, --help
output the usage message then exit.
-H, --hex
output the response (less the CRC field) in hexadecimal.
-i, --ignore
sets the Ignore Zone Group bit in the SMP Discover request.
Expander phys hidden by zoning will appear as "phy vacant"
unless this option is given.
-I, --interface=PARAMS
interface specific parameters. In this case "interface" refers
to the path through the operating system to the SMP initiator.
See the smp_utils man page for more information.
-l, --list
list attributes in "name=value" form, one entry per line.
-m, --multiple
loops over multiple phys within SMP target (typically an
expander) and does a DISCOVER request and outputs a one line
summary. Phy 0 is queried first, then phy 1, continuing until an
error occurs. If --brief is given then there is no output for
phys that indicate there is no attached device; when used twice
additionally trims the output line of attached phys. See the
section below on SINGLE LINE PER PHY FORMAT.
-M, --my
outputs my (this expander's) SAS address in hex (prefixed by
"0x"). This is obtained from the DISCOVER response of phy id 0
(unless --phy=ID is given). The expander's SAS address is typi‐
cally available even if a phy is not connected, "vacant" or dis‐
abled. This option overrides most other options (e.g. overrides
--multiple and --summary options).
-n, --num=NUM
number of phys to fetch, starting at --phy=ID when the --multi‐
ple option is given. The default value is 0 which is interpreted
as "the rest" (i.e. until a "phy does not exist" function result
is received). This option is ignored in the absence of the
--multiple option.
-p, --phy=ID
phy identifier. ID is a value between 0 and 254. If this option
is not given then the --summary option is assumed.
-r, --raw
send the response (less the CRC field) to stdout in binary. All
error messages are sent to stderr.
-s, --sa=SAS_ADDR
specifies the SAS address of the SMP target device. Typically
this is an expander. This option may not be needed if the
SMP_DEVICE has the target's SAS address within it. The SAS_ADDR
is in decimal but most SAS addresses are shown in hexadecimal.
To give a number in hexadecimal either prefix it with '0x' or
put a trailing 'h' on it.
-S, --summary
output a multi line summary, with one line per active phy.
Checks all phys (or less is --num=NUM is given), starting at phy
0 (unless --phy=ID is given). Equivalent to '--multiple --brief'
('-mb'). See the section below on SINGLE LINE PER PHY FORMAT.
If the --phy=ID is not given then this option is assumed.
-v, --verbose
increase the verbosity of the output. Can be used multiple times
-V, --version
print the version string and then exit.
-z, --zero
zero the Allocated Response Length field in the request. This
option also zeros the Request Length field in the request. This
is required for strict SAS-1.1 compliance. However this option
should not be given in SAS-2 and later; if it is given an
abridged response may result.
SINGLE LINE PER PHY FORMAT
The --summary option causes SMP DISCOVER responses to be compressed to
a header followed by one line per phy. To save space SAS addresses are
shown in hex without a '0x' prefix or 'h' suffix. The header line gives
the SAS address of the SMP target itself and assumes it is an expander.
Each line starts with " phy <n>:" where <n> is the phy identifier
(and they are origin zero). That is followed by the routing attribute
represented by a single letter which is either "D" for direct routing,
"S" to subtractive routing or "T" for table routing. Then comes the
negotiated physical link rate which is either "disabled", "reset prob‐
lem" or "spinup hold". Other states are mapped to "attached". This
includes enabled phys with nothing connected which appear as
"attached:[0000000000000000:00]".
Information shown between the brackets is for the attached device.
Phys that are connected display something like:
"attached:[5000c50000520a2a:01 " where the first number is the attached
SAS address (in hex) and the second number is the attached device's phy
identifier. If the attached device type is other than an end device
then one of these abbreviations is output: "exp" (for expander), "fex"
(for fanout expander) or "res" (for unknown attached device type). If a
phy is flagged as "virtual" then the letter "V" appears next. Next are
the protocols supported by the attached device which are shown as
"i(<list>)" for initiator protocols and/or "t(<list>)" for target pro‐
tocols. The <list> is made up of "PORT_SEL", "SSP", "STP", "SMP" and
"SATA" with "+" used as a separator. For example a SAS host adapter
wi11 most likely appear as: "i(SSP+STP+SMP)". This completes the infor‐
mation about the attached phy, hence the closing right bracket.
If appropriate, the negotiated physical link rate is shown in gigabits
per second. Here is an example of a line for expander phy identifier 11
connected to a SATA target (or SATA "device" to use the t13.org term):
phy 11:T:attached:[500605b000000afb:00 t(SATA)] 1.5 Gbps
If the expander supports zoning (i.e. REPORT GENERAL response bit for
'zoning supported' is set) and a phy's zone group is other than zg 1
then the phy's zone group is shown (e.g. "ZG:2").
If the --adn option is given then after the attached SAS address and
the attached device's phy identifier are output an extra field is
inserted containing the "attached device name" field. For a SAS disk
this should be its target device name (in NAA-5 format) and for a SATA
disk its WWN (if provided, also in NAA-5 format). Also when the --adn
option is given the phy speed and zone group are not output in order to
keep the line length reasonable.
NOTES
In SAS-2 and later both the DISCOVER and DISCOVER LIST functions are
available. The DISCOVER LIST function should be favoured for several
reasons: its response can hold up to 40 descriptors each describing the
state of one expander phy. The vast majority of expander chips on the
market support 36 phys or less so one DISCOVER LIST response will sum‐
marize the states of all its phys. With the DISCOVER function only one
expander phy's state is returned in its response. Other advantages of
the DISCOVER LIST function are its "phy filter" and "descriptor type"
function request fields.
EXAMPLES
See "Examples" section in http://sg.danny.cz/sg/smp_utils.html
CONFORMING TO
The SMP DISCOVER function was introduced in SAS-1, with small additions
in SAS-1.1 . There have been a large number of additions in SAS-2 .
AUTHORS
Written by Douglas Gilbert.
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright © 2006-2011 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO war‐
ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR‐
POSE.
SEE ALSO
smp_utils, smp_discover_list, smp_phy_control
smp_utils-0.96 May 2011 SMP_DISCOVER(8)
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