Provided by: lsscsi_0.21-2build1_amd64 bug


       lsscsi - list SCSI devices (or hosts) and their attributes


       lsscsi  [--classic]  [--device] [--generic] [--help] [--hosts] [--kname] [--list] [--long]
       [--transport] [--verbose] [--version] [H:C:T:L]


       Uses information in sysfs (linux kernel series 2.6 and later) to  list  scsi  devices  (or
       hosts)  currently  attached  to  the system. Options can be used to control the amount and
       form of information provided for each device.

       If a H:C:T:L argument is given then it acts as a filter and only devices that match it are
       listed. The colons don't have to be present, and '-', '*', '?' or missing arguments at the
       end are interpreted as wildcards. '-' needs to stand alone or else  it  is  taken  as  the
       beginning  of  an  option  (e.g.  '-:-:-:-'  is illegal). '*' needs to be escaped from the
       shell. A leading '[' and trailing ']' are permitted (e.g. '[1:0:0]' matches  all  luns  on
       1:0:0).  May  also be used to filter --hosts in which case only the H is active and may be
       either a number or in the form "host<n>" where <n> is a host number.

       By default in this utility device node names (e.g.  "/dev/sda"  or  "/dev/root_disk")  are
       obtained  by  noting the major and minor numbers for the listed device obtained from sysfs
       (e.g. the contents of "/sys/block/sda/dev") and then looking for a  match  in  the  "/dev"
       directory.  This  "match  by  major  and  minor" will allow devices that have been given a
       different name by udev (for example) to be correctly reported by this utility.

       In some situations it may be useful to see the device node name that linux  would  produce
       by  default, so the --kname option is provided.  An example of where this may be useful is
       kernel error logs which tend to report disk error messages using the disk's default kernel

       Information   about   this   utility   including   examples   can   also   be   found  at: .


       -c, --classic
              The output is similar to that obtained from 'cat /proc/scsi/scsi'

       -d, --device
              After outputting the (probable) scsi device name the device node  major  and  minor
              numbers are shown in brackets (e.g. "/dev/sda[8:0]").

       -g, --generic
              Output the scsi generic device file name. Note that if the sg driver is a module it
              may need to be loaded otherwise '-' may appear.

       -h, --help
              Output the usage message and exit.

       -H, --hosts
              List the SCSI hosts currently attached to the system. If this option is  not  given
              then SCSI devices are listed.

       -k, --kname
              Use  linux  default  algorithm  for  naming devices (e.g. block major 8, minor 0 is
              "/dev/sda") rather than the "match by major and minor" in the "/dev"  directory  as
              discussed above.

       -L, --list
              Output  additional information in <attribute_name>=<value> pairs, one pair per line
              preceded by two spaces. This option has the same effect as '-lll'

       -l, --long
              Output additional information for each SCSI device (host).  Can  be  used  multiple
              times  for  more  output  in  which case the shorter option form is more convenient
              (e.g. '-lll'). When used three times  (i.e.  '-lll')  outputs  SCSI  device  (host)
              attributes    one    per    line;   preceded   by   two   spaces;   in   the   form

       -t, --transport
              Output transport information. This will be a  target  related  information  or,  if
              --hosts  is  given, initiator related information. When used without --list, a name
              or identifier (or both) are output on a single line, usually prefixed by  the  type
              of  transport. For devices this information replaces the normal vendor, product and
              revision strings. When the --list option is also given then  additionally  multiple
              lines of attribute_name=value pairs are ouput, each indented by two spaces. See the
              section on transports below.

       -v, --verbose
              outputs directory names where information is found. Use  multiple  times  for  more

       -V, --version
              outputs version information then exits.


       Information  for  this  command is derived from the sysfs file system whose mount point is
       found by examining the contents of /proc/mounts .  SCSI (pseudo) devices  that  have  been
       detected  by  the  SCSI  mid level will be listed even if the required upper level drivers
       (i.e. sd, sr, st, osst or ch) have not been loaded. If the appropriate upper level  driver
       has  not  been  loaded  then the device file name will appear as '-' rather than something
       like '/dev/st0'. Note that some devices (e.g. scanners and medium changers) do not have  a
       primary upper level driver and can only be accessed via a scsi generic (sg) device name.

       This  version  of  lsscsi (0.20) or later is required to correctly display SCSI devices in
       linux kernel 2.6.26 (and possibly later) when the CONFIG_SYSFS_DEPRECATED_V2 kernel option
       is not defined.


       This  utility  lists  SCSI  devices  which  are  known  as  logical units (lu) in the SCSI
       Architecture Model (ref: SAM-4 at or hosts when the --hosts option  is
       given.  A  host  is  called  an  initiator  in  SAM-4.  A  SCSI command travels out via an
       initiator, across some transport to a target and then onwards to a logical unit. A  target
       device  may  contain several logical units. A target device has one or more ports that can
       be viewed as transport end points. Each FC and SAS disk is a single target  that  has  two
       ports  and  contains  one  logical  unit.  If  both  target  ports on a FC or SAS disk are
       connected and visible to a machine, then lsscsi will show two  entries.  Initiators  (i.e.
       hosts)  also have one or more ports and some HBAs in Linux have a host entry per initiator
       port while others have a host entry per initiator device.

       When the --transport option is given for devices (i.e.  --hosts not given)  then  most  of
       the  information  produced by lsscsi is associated with the target, or more precisely: the
       target port, through which SCSI commands pass that access a logical unit.

       Typically this utility provides one line of output per "device"  or  host.   Significantly
       more  information can be obtained by adding the --list option. When used together with the
       --transport  option,  after  the  summary  line,  multiple  lines  of  transport  specific
       information  in  the  form  "<attribute_name>=<value>"  are  output,  each indented by two
       spaces.  Using a filter argument will reduce the volume of output if a lot of  devices  or
       hosts are present.

       The transports that are currently recognized are: IEEE 1394, FC, iSCSI, SAS and SPI.

       For  IEEE  1394  (a.k.a.  Firewire  and  "SBP" when storage is involved), the EUI-64 based
       target port name is output when --transport is  given,  in  the  absence  of  the  --hosts
       option.  When  the  --hosts option is given then the EUI-64 initiator port name is output.
       Output on the summary line specific to the IEEE 1394 transport is prefixed by "sbp:".

       For Fibre Channel (FC) the port name and port identifier are output  when  --transport  is
       given.  In  the  absence  of  the  --hosts  option  these  ids will be for the target port
       associated with the device (logical unit) being listed. When the --hosts option  is  given
       then  the  ids  are  for  the  initiator port used by the host. Output on the summary line
       specific to the FC transport is prefixed by "fc:".

       For iSCSI the target port name is output when --transport is given, in the absence of  the
       --hosts  option.  This is made up of the iSCSI name and the target portal group tag. Since
       the iSCSI name starts with "iqn" no further prefix is used. When  the  --hosts  option  is
       given then only "iscsi:" is output on the summary line.

       For  Serial Attached SCSI the SAS address of the target port (or initiator port if --hosts
       option is also given) is output. This will be a  naa-5  address.  For  SAS  HBAs  and  SAS
       targets (such as SAS disks and tape drives) the SAS address will be world wide unique. For
       SATA disks attached to a SAS expander, the expander provides the SAS address by  adding  a
       non  zero  value  to  its  (i.e.  the expander's) SAS address (e.g. expander_sas_address +
       phy_id + 1). SATA disks directly attached to SAS HBAs seem to have  an  indeterminate  SAS
       address. Output on the summary line specific to the SAS transport is prefixed by "sas:".

       For the SCSI Parallel Interface (SPI) the target port identifier (usually a number between
       0 and 15 inclusive) is output when --transport is given, in the  absence  of  the  --hosts
       option. When the --hosts option is given then only "spi:" is output on the summary line.


       Written by Doug Gilbert


       Report bugs to <dgilbert at interlog dot com>.


       Copyright © 2003-2008 Douglas Gilbert
       This  software  is distributed under the GPL version 2. There is NO warranty; not even for


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