smp_discover man page on Scientific
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SMP_DISCOVER(8) SMP_UTILS SMP_DISCOVER(8)
NAME
smp_discover - invoke DISCOVER SMP function
SYNOPSIS
smp_discover [--brief] [--help] [--hex] [--ignore] [--interface=PARAMS]
[--list] [--multiple] [--num=NUM] [--phy=ID] [--raw] [--sa=SAS_ADDR]
[--verbose] [--version] SMP_DEVICE[,N]
DESCRIPTION
Sends a SAS Management Protocol (SMP) DISCOVER request function to a
SMP target and decodes or outputs the response. The SMP target is iden‐
tified by the SMP_DEVICE and the SAS_ADDR. Depending on the interface,
the SAS_ADDR may be deduced from the SMP_DEVICE. With one interface
there is one SMP_DEVICE per machine so the SMP_DEVICE,N syntax is
needed to differentiate between HBAs if there are multiple present.
OPTIONS
Mandatory arguments to long options are mandatory for short options as
well.
-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 in hexadecimal.
-i, --ignore
sets the Ignore Zone Group bit in the SMP Discover request.
-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.
-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 127. Default is 0.
-r, --raw
send the response 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.
-v, --verbose
increase the verbosity of the output. Can be used multiple times
-V, --version
print the version string and then exit.
SINGLE LINE FORMAT
The --multiple 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.
Finally, 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
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 © 2006-2008 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-0.93 January 2008 SMP_DISCOVER(8)
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