Mount vs unmount

can anybody explain the difference between mounting and unmounting??
what is a mounting point and mount state???
thanx

mount point is synonym of mount state. maybe you mean mount point of OFA http://ss64.com/ora/syntax-ofa.html ?
NomountWhen Oracle starts an instance it reads the spfile or pfile to determine the initialization paramters. It uses these paramters to allocate the SGA and create background proccesses. All this is done without associating a database to the instance! At this point the instance is started but not mounted, or as some say "Started in no mount mode". They say that because you can reach this state by using the SQL*Plus command "startup nomount".
mountWhen a database is mounted, the datafiles are actually associated is the instance. It's somewhat akin to loading the bullets into a gun; the gun is mearly a vehicle to utilize bullets and without them it's utterly useless. As a fun test, you can rename the datafile directory (where the control and datafiles are) and startup the instance without mounting. You won't get an error, you won't get a complaint... because Oracle isn't interested in anything but the parameter files at this point. Even though the pfile specifies the location of the control file, it hasn't tried to open the control files yet so it won't complain!

Similar Messages

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    i creating a database just to practice and sharpen my skills since i've been out of school for a while. someone suggested i do some of the following transactions like creating clusters and mounting and unmounting the database. I've found info on creating clusters, but haven't found anything on mounting and unmounting an oracle database. can someone please assist me with this?
    thanks,
    YR

    Hi..
    Have you created a database.You can create the database using DBCA utility and also maually.
    for manually creating the database [http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_5004.htm#SQLRF01204]
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    Go through [http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/start.htm#sthref569]
    [http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/startup.htm#sthref1915]
    HTH
    Anand

  • Raid 0 (pair of 1GB drives) unable to mount or unmount.

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      Number of Processors:          1
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  • [SOLVED] advanced shell script for mount and unmount samba share

    Good morning guys,
    Today I've a very long question....
    Hope in your help....:
    I usually move from different network.
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    I want/need to implement it whit the follow addictions:
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    2. check if the share are already mounted: to prevent accidentally multiple mount. If a share is already mounted I want to print something like "TsHOME is already mounted on /home/myuser/samba_share/TsHOME"
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    If it's no extremely difficult, can someone help me to write this script?
    I know that man exist but I'm not a programmer and it's so difficult for me approch it.
    Thank you in advance.
    Ale
    Last edited by Alexbit (2010-09-23 21:29:13)

    Thank you very (VERY) much!
    I've follow your information and.. it work!
    If can be usefull to other this is the complete script:
    #!/bin/sh
    echo "This is a custom script for mount citrix share"
    echo "****************************************"
    echo " "
    echo "Please insert domain password:"
    read -s mypassword
    echo " "
    echo "|checking mount state...in share are not mounted mount it!|"
    echo "+-------------------------------------------------------------------------+"
    if grep "TsHome" /etc/mtab &>/dev/null; then
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    fi
    echo " "
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    grep "direction" /etc/mtab | awk '{print "direction is already mounted on " $2}'
    else
    sudo mount -t cifs -o username='yourusername',password="$mypassword" '//ipaddress/direction' /home/Samba_share/direction' && echo "direction pat is now mounted" || echo "unable to mount direction"
    fi
    echo " "
    if grep "Area" /etc/mtab &>/dev/null; then
    grep "Area" /etc/mtab | awk '{print "Area is already mounted on " $2}'
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    sudo mount -t cifs -o username='yourusername',password="$mypassword" '//ipaddress/Area' /home/Samba_share/Area && echo "Area is now mounted" || echo "unable to mount Area"
    fi
    echo " "
    echo "All DONE!"
    echo " "
    read -p "Press ENTER key to close this terminal"
    exit
    I don't really well understand what I've to put in rc.local.shutdown....
    I think somethings like:
    #!/bin/bash
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    echo "This is a custom script for UN-mount citrix share"
    echo "********************************************"
    echo " "
    echo "|check mount state: if mount then un-mount!|"
    echo "+-------------------------------------------------------+"
    echo " "
    if grep "TsHome" /etc/mtab &>/dev/null; then
    grep "TsHome" /etc/mtab | awk '{print "TsHome is NOT mounted -> going on..." $2}'
    else
    sudo umount /home/Samba_share/TsHOME && echo "TsHOME is now UN mounted" || echo "unable to UN-mount TsHOME"
    fi
    echo " "
    if grep "direction" /etc/mtab &>/dev/null; then
    grep "direction" /etc/mtab | awk '{print "direction is NOT mounted -> going on.." $2}'
    else
    sudo umount /home/Samba_share/direction && echo "direction is now UN mounted" || echo "unable to UN-mount direction pat"
    fi
    echo " "
    if grep "Area" /etc/mtab &>/dev/null; then
    grep "Area" /etc/mtab | awk '{print "Area is NOT mounted - Finished" $2}'
    else
    sudo umount /home/Samba_share/Area && echo "Area is now UN mounted" || echo "unable to UN-mount Area"
    fi
    echo " "
    echo "going shutdown"
    echo " "
    sleep 5
    I've try but it seems to ignore the IF statement... this is the output when ALL share are UNmounted:
    $ sh /etc/rc.local.shutdown
    This is a custom script for UN-mount citrix share
    |check mount state: if mount then un-mount!|
    +-------------------------------------------------------+
    umount: /home/Samba_share/TsHOME: not mounted
    unable to UN-mount TsHOME
    umount: /home/Samba_share/direction: not mounted
    unable to UN-mount direction
    umount: /home/Samba_share/Area: not mounted
    unable to UN-mount Area
    going shutdown
    Tomorrow I will test again when I'm at office.
    Meanwhile can you check if I made a macroscopic mistakes?
    Thank you again!
    Last edited by Alexbit (2010-09-23 17:34:49)

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