Changeset 3119 in MondoRescue

Timestamp:

May 10, 2013, 8:54:24 PM (11 years ago)

Author:

Bruno Cornec

Message:

r5281@localhost: bruno | 2013-05-08 11:56:49 +0200

• Fix support for OBDR tapes on SCSI cards: in some cases the tape remains in OBDR mode (aka CDROM emulation) preventing the init script to work correctly. It now try to detect these cases, and to reset the SCSI device being of type CDROM (5) and looking like a tape drive as a model. (Not tested yet)
• Improve in consequence the OBDR specific README
• Adds support for the obdrmods boot parameter if some additional drivers should be removed
• adds rev to the minimal list of tools to have as this is now potentially required

Location:

branches/3.0/mindi

Files:

• README.bootparam (modified) (1 diff)
• README.obdr (modified) (2 diffs)
• deplist.d/minimal.conf (modified) (1 diff)
• rootfs/etc/init.d/rcS (modified) (2 diffs)

branches/3.0/mindi/README.bootparam

@@ -60 +60 @@
     Call mondorestore with -o and the tape device
 
+obdrmods="mod1 mod2"
+    Remove these modules in order to be able to reset the tape dvice using it and place it in sequential mode. A default list of modules is aloready embedded so this should only be used if the list is unsufficient. Please report that usage to dev team.
+
 pre=/path/to/script
     Execute a pre-configuration script before calling mondorestore. Could be an NFS shared script e.g., or a script located in the initrd. Eg: pre=/tmp/isodir/my-pre.sh. Note that the script should be executable.

branches/3.0/mindi/README.obdr

@@ -4 +4 @@
 
 You need to use the options -o and -t of mondoarchive to activate it.
-You may also need an additional software (hpsa_obdr_mode) if using HP ProLiant servers, in order to put th tape drive in the right mode from the command line (also in case of problem after OBDR boot, when the drive doesn't come back alone into tape mode Cf: http://trac.mondorescue.org/ticket/358)
-That software is available from http://cciss.sf.net/ and http://trac.mondorescue.org/attachment/ticket/358/hpsa_obdr_mode.c + http://trac.mondorescue.org/attachment/ticket/358/Makefile
+You may also need an additional software (hpsa_obdr_mode) if using a tape drive attached to the Smart Array controller of a HP ProLiant servers, in order to put the tape drive in the right mode from the command line (also in case of problem after OBDR boot, when the drive doesn't come back alone into tape mode Cf: http://trac.mondorescue.org/ticket/358). That software is available from http://cciss.sf.net/ and http://trac.mondorescue.org/attachment/ticket/358/hpsa_obdr_mode.c + http://trac.mondorescue.org/attachment/ticket/358/Makefile
+You may also need an additional software (sg_wr_mode) if using a tape drive attached to a SCSI controller of a server, in order to put the tape drive in the sequential mode after OBDR boot, when the drive doesn't come back alone into that mode. That software is available within the sg3_utils package. 
 
-Here is an example script showing how to setup the tape based DR correctly completely from the CLI on SLES 10 on a ProLiant server using an internal SAS DAT 160 tape drive:
+Here is an example script showing how to setup the tape based DR correctly completely from the CLI on SLES 10 on a ProLiant server using an internal SAS DAT 160 tape drive connected to the embedded Smart Array controller:
 
 # Create some temp dirs for mondoarchive
@@ -23 +23 @@
 #reboot
 
-The machine is backed up and then rebooted in the OBDR mode ... without using the button ;-)
+The machine is backed up and then rebooted in the OBDR mode ... without even using the button ;-)
+
+Here is an example script showing how to setup correctly at restore time the tape completely from the CLI on SLES 11 on a ProLiant server using an external SAS Ultrium 4 tape drive connected to a SCSI controller:
+
+# Determine which generic SCSI device needs to be used - It may appear as a CD if in OBDR mode (non sequential)
+sg_map
+[...]
+/dev/sg1  /dev/scd1
+[...]
+# you may cross check with cat /proc/scsi/scsi
+#
+# Inquire in which mode the tape is (CD-rom drive == 0x05, tape drive == 0x01)
+sg_inq -d /dev/sg1 
+[...]
+Device_type=5
+
+# Reset the device in order to be in Sequential mode again
+sg_reset -d /dev/sg1
+
+# Remove all related drivers and reload them
+rmmod st
+rmmod mptsas
+rmmod mptspi
+modprobe mptspi
+modprobe mptsas
+modprobe st

branches/3.0/mindi/deplist.d/minimal.conf

@@ -22 +22 @@
 /sbin/pidof
 /etc/init.d/functions
+/usr/bin/rev
 # On ArchLinux
 /bin/pidof

branches/3.0/mindi/rootfs/etc/init.d/rcS

@@ -142 +142 @@
     [ ! "$tapedev" ] && tapedev=`grep media-dev /tmp/mondo-restore.cfg 2>/dev/null | tr -s ' ' ' ' | cut -d' ' -f2`
     mt -f $tapedev rewind
+    if [ $? -ne 0 ]; then
+        LogIt "WARNING: $tapedev failed to rewind, either not a tape or still in OBDR mode." 1
+        LogIt "         Trying to find the corresponding SCSI generic device." 1
+        c=0
+        for d in `ls /sys/class/scsi_device/*`; do
+            devtype=`cat $d/device/type`
+            if [ _"$devtype" -eq _"1" ]; then
+                LogIt "NOTE: Device /dev/sg$c is a Sequential device." 1
+                if [ -x /usr/bin/sg_map ]; then
+                    dev=`/usr/bin/sg_map | grep -E "^/dev/sg$c" | awk '{print $2}'`
+                    LogIt "      Retry using device $dev" 1
+                fi
+            elif [ _"$devtype" -eq _"0" ]; then
+                # Skipping a HDD
+            elif [ _"$devtype" -eq _"5" ]; then
+                # Checking whether it's a CD or a tape in OBDR mode
+                grep -q -i -E 'dat|ultrium|tape' $d/device/model
+                if [ $? -eq 0 ]; then
+                    # Is probably a Tape drive left in OBDR.
+                    LogIt "Found that /dev/sg$c is a tape drive (`cat $d/device/model`)." 1
+                    grep -q -i -w 'hp' $d/device/vendor
+                    if [ $? -eq 0 ]; then
+                        LogIt "This is an HP tape drive, even better :-)." 1
+                    fi
+                    if [ -x /usr/bin/sg_reset ]; then
+                        OBDR_MODS="st mptsas mptspi aic7xxx aic94xx mpt2sas "
+                        if [ "`grep -i obdrmods /proc/cmdline`" ]; then
+                            OBDR_MODS="$OBDR_MODS `cat /proc/cmdline | sed 's~.*obdrmods=\"\(.*\)\".*~\1~'`"
+                        fi
+                        LogIt "Removing modules $OBDR_MODS." 1
+                        for m in $OBDR_MODS; do
+                            rmmod $i
+                        done
+                        LogIt "Trying to force device /dev/sg$c to be in sequential mode." 1
+                        /usr/bin/sg_reset -d /dev/sg$c
+                        LogIt "Inserting modules `rev $OBDR_MODS`." 1
+                        for m in `rev $OBDR_MODS`; do
+                            modprobe $i
+                        done
+                        LogIt "Retry again as the device has been set back into sequential mode." 1
+                        mt -f $tapedev fsf 2
+                        res=$?
+                        # exit the loop to continue and return if that previous mt failed. 
+                        # If it succeeded we transparently continue !!
+                        break
+                    else
+                        LogIt "WARNING: Unable to reset /dev/sg$c as the sg_reset command is not availble." 1
+                    fi
+                fi
+            else 
+                LogIt "Device /dev/sg$c has an unknown type $devtype." 1
+            fi
+            c=`expr $c + 1`
+        done
+
+        if [ $res -ne 0 ]; then
+            cd $old_pwd
+            return $res
+        fi
+    fi
+
     mt -f $tapedev fsf 2
     # 32k is DEFAULT_INTERNAL_TAPE_BLOCK_SIZE
@@ -667 +728 @@
 }
 
-
 EnableCcissIfAppropriate() {
     local f