smp_discover_list - invoke DISCOVER LIST SMP function


smp_discover_list [--brief] [--descriptor=TY] [--filter=FI] [--help] [--hex] [--ignore] [--interface=PARAMS] [--num=NUM] [--one] [--phy=ID] [--raw] [--sa=SAS_ADDR] [--verbose] [--version] SMP_DEVICE[,N]


Sends a SAS Management Protocol (SMP) DISCOVER LIST request function to a SMP target and decodes or outputs the response. 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. 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.


Mandatory arguments to long options are mandatory for short options as well.
-b, --brief
 reduce the decoded response output.
-d, --descriptor=TY
 DISCOVER response format as descriptor in the response. When TY is 1 use the short format (i.e. 24 byte per descriptor) descriptor in the response.
-f, --filter=FI
 set the filter field in the request. When FI is 0 (default) fetch descriptors for all phys. When FI is 1 only fetch descriptors for phys attached to expanders. When FI is 2 only fetch descriptors for phys attached to expanders or end devices.
-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 list 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.
-n, --num=NUM
 maximum number of descriptors fetch. If any descriptors are in the response the first phy id will be greater than or equal to the argument of --phy=ID. Note that maximum SMP frame size is 1032 bytes (including a trailing 4 byte CRC) which may limit the number of descriptors that can be fetched by a single DISCOVER LIST function (especially when ’--descriptor=0’).
-o, --one use one line (summarized) format for each descriptor in the response. The default action when this option is not given is to output multiple indented lines for each descriptor in the response.
-p, --phy=ID
 phy identifier. ID is a value between 0 and 127. Default is 0. This is the lowest numbered phy id to attempt fetch in the response. Note that due to the filter field setting, the first phy id in the response may be greater than the argument to this option.
-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.


The --one option causes SMP DISCOVER LIST descriptors to be compressed to a header section followed by one line per phy. To save space SAS addresses are shown in hex without a ’0x’ prefix or ’h’ suffix. The header section outputs information found in the DISCOVER LIST response’s header section.

For each descriptor in the DISCOVER LIST response, one line is output starting 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 problem" 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 protocols. 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 information 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 term):

phy 11:T:attached:[500605b000000afb:00 t(SATA)] 1.5 Gbps


The SMP DISCOVER LIST function was introduced in SAS-2 .


Written by Douglas Gilbert.


Report bugs to <dgilbert at interlog dot com>.


Copyright © 2006-2008 Douglas Gilbert This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


smp_utils, smp_discover, smp_phy_control

openSUSE Logo