Re: "restarting" scsi

["Tobias Diedrich" <ranma@example.com>]

> > Here is how I add my zip drive on the fly, if I need it:
> > echo "scsi add-single-device 0 0 2 0">/proc/scsi/scsi
> >
> > I cannot give any more advice on this, unless you give more details. It
> > should be explained in more details in the SCSI-howto, kernel docs, etc.
>
> Thanks for the advice.
> Time to recompile the kernel and read the docs.

My SuSE 7.0 came with a short shell script called rescan-scsi-bus.sh.
Works fine with me.
-------------------
#!/bin/bash
# Skript to rescan SCSI bus, using the
# scsi add-single-device mechanism
# (w) 98/03/19 Kurt Garloff <kurt@example.com> (c) GNU GPL

# Return hosts. /proc/scsi/HOSTADAPTER/? must exist
findhosts ()
{
  hosts=
  for name in /proc/scsi/*/?; do
    name=${name#/proc/scsi/}
    if test ! $name = scsi
      then hosts="$hosts ${name#*/}"
      echo "Host adapter ${name#*/} (${name%/*}) found."
    fi
  done
}

# Test if SCSI device $host $channen $id $lun exists
# Outputs description from /proc/scsi/scsi, returns new
testexist ()
{
  grepstr="scsi$host Channel: 0$channel Id: 0*$id Lun: 0$lun"
  new=`cat /proc/scsi/scsi|grep -e"$grepstr"`
  if test ! -z "$new"
    then cat /proc/scsi/scsi|grep -e"$grepstr"
    cat /proc/scsi/scsi|grep -A2 -e"$grepstr"|tail -2|pr -o4 -l1
  fi
}

# Perform search (scan $host)
dosearch ()
{
  for channel in $channelsearch; do
    for id in $idsearch; do
      for lun in $lunsearch; do
        new=
 devnr="$host $channel $id $lun"
 echo "Scanning for device $devnr ..."
 printf "OLD: "
 testexist
 if test ! -z "$remove" -a ! -z "$new"
   then echo "scsi remove-single-device $devnr" >/proc/scsi/scsi
   echo "scsi add-single-device $devnr" >/proc/scsi/scsi
   printf "\r\x1b[A\x1b[A\x1b[AOLD: "
   testexist
   if test -z "$new"; then printf "\rDEL: \r\n\n\n\n"; let rmvd+=1; fi
 fi
 if test -z "$new"
   then printf "\rNEW: "
   echo "scsi add-single-device $devnr" >/proc/scsi/scsi
   testexist
   if test -z "$new"; then printf "\r\x1b[A"; else let found+=1; fi
 fi
      done
    done
  done
}


# main
if test @$1 = @example.com -o @$1 = @example.com
  then
    echo "Usage: rescan-scsi-bus.sh [-l] [-w] [-c] [host [host ...]]"
    echo " -l activates scanning for LUNs 0 .. 7 [default: 0]"
    echo " -w enables scanning for device IDs 0 .. 15 [def.: 0 .. 7]"
    echo " -r enables removing of devices        [default: disabled]"
    echo " -c enables scanning of channels 0 1   [default: 0]"
    echo " If hosts are given, only these are scanned [default: all]"
    exit 0
fi

# defaults
lunsearch="0"
idsearch="0 1 2 3 4 5 6 7"
channelsearch="0"
remove=""

# Scan options
opt="$1"
while test ! -z "$opt" -a -z "${opt##-*}"; do
  opt=${opt#-}
  case "$opt" in
    l) lunsearch="0 1 2 3 4 5 6 7" ;;
    w) idsearch="0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" ;;
    c) channelsearch="0 1" ;;
    r) remove=1 ;;
    *) echo "Unknown option -$opt !" ;;
  esac
  shift
  opt="$1"
done

# Hosts given ?
if test @$1 = @; then findhosts; else hosts=$*; fi

declare -i found=0
declare -i rmvd=0
for host in $hosts; do dosearch; done
echo "$found new device(s) found.               "
echo "$rmvd device(s) removed.                 "
---------------------------

btw,

I already sent this mail once using pine, but pine is using a differen
From-Address, so it did not appear
on the list...
How do I set my From & Reply-To address in Pine ?

Tobias Diedrich