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How to partition, & mirror different size disks

Posted on 1997-07-28
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Last Modified: 2012-05-04
Given a SYS: drive, which is a 1.2 Gb - approx 100 mb for dos.  I have a 1.7 Gb disk what I want to partition to match the SYS: partition.  Then I want to mirror the two.  I would also like to duplicate the 100 mb dos partition.  Please answer the following questions -- ASSUME THAT YOU ARE TALKING TO AN USER WHO HAS TO DO THIS:

1) I can install the 1.7 gb disk on the second IDE controller (on the P133 mother board) as the master.  Correct?

2) For the DOS partition.  Would I run FDISK from DOS and partition the new drive (E:) with the same partition table as the current C: disk?  Or is there a better way?

3) Now I need to create a Novell InternetWare 4.11 partition to match the size of my SYS: partition.  How?

4) How do it turn mirroring On?  Off?

5) When I turn mirroring on, how long before both drives have the exact same data?  Will Novell give me a message saying that the drives have been sync-ed?

6)  Now if I turn Mirroring off (HOW?) and unplug the new disk.  I will have a bootable and running copy of Novell for emergencies.  Right?

6a)  I know that this will be a static copy of my Server's SYS: partition.  This is OK!

To get an exelecent rating ("A") you will need to provide an explation of what is involved _AND_ a set of step by step instuctions that the average person/user can follow.  DO _NOT_ assume that I am a CNE, CNA, or Novell expert.  I am not.
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Question by:Jesse_Tutterrow
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Accepted Solution

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Hector072497 earned 150 total points
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You can only have two possible partitions on any DOS drive so you will have to make the primary DOS partition larger as the new NetWare partition will have to remain the exact same size as the one you are mirroring.

Step 1: Do the above with FDISK (Do only the primary DOS part.)

Step 2: Type <load install> on the file server console

Step 3: Choose "Disk Options" from the menu

Step 4: Choose "Partition Tables" from the menu

Step 5: Choose "Create Netware Partition"

Step 6: Select the new hard drive then press <escape>

Step 7: Press <enter> to begin partionning

Step 8: Press <escape> twice to return to "Available Disk                                                 Options"

Step 9: Choose "Mirroring" from the menu and select the partition you want mirrored on the new drive and press <insert>

Step 10: Choose the new partition and press <enter> to begin the mirroring process.

Step 11: If necessary, press <insert> to allow the software to change the partition size to match that of the existing Netware Drive.

Note: It should take aproximately 30 minutes to mirror the hard drive and you will also have to copy all of the files that are on the dos partition as you can only mirror one partiton.

Step 12: Exit the install module down the server, exit and reboot.

Note: Mirroring will improve read performance but is not a backup solution (you cannot just simply remove the hard drive and store it for future use). A mirrored drive must stay that way until you unmirror it at which you will loose all info on this partition. The only way to retain fault tolerance is to leave it alone and hope you never have to use it!
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Expert Comment

by:ncrosby
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Just some comments on the above solution and your problem:

1) note: A DOS drive can have 4 partitions.

2) Add the second drive as master on the second IDE channel.

3) Use fdisk to mske the dos partition (primary).  You have lots of room on the new drive so make it a bit bigger thatn the original.  xcopy the data from c:\ to the new drive.  Make a floppy disk, bootable, with fdisk on it.  If the original drive bites the dust, the server will not boot from the other drive.  You will have to remove the dead drive, boot from the floppy, make the dos partition on the backup drive the active partition then reboot. The system will then restart.

4) Use the Netware install utility to create the new Netware partition. (load install, choose the partitions option, create a new partition)  Make the new partition larger than the original.  Netware requires that the second partition be at least as big as the original.  It won't work if it is smaller.

5) Use the same utility (install) and go to the partitions section again.  Choose the mirror option.  Select the sys volume and follow the prompts/menu's to mirror it.  I do not have everything in fromt of me now, so I cannot give you the exact steps.  If I remember correctly, it is not too hard.   If you come up to a screen of mirrored drives and it is empty, press the  INS key to add your new mirror drive set.  By the way, mirroring and duplexing are very similar, you may be actually duplexing because your drives are technically on separate controllers.

5) Mirroring will start automatically.  It can take a long time.  It may take more than an hour on your system.

6) System commands: Type help at the console prompt to get a list of commands you can use.  Some of interest will be:
Abort remirror partition #
Remirror #
Mirror status
Again, exact syntax may differ as I do not have a server in fromt of me.  The mirror status command will give you the partition numbers you need for the other commands.

7) Netware will automatically give prompts on the screen when the drives are out of sync.  They will show every few minutes.  A single message will be displayed when the sync is established.

8) The mirror is not sytatic...it is dynamic.  Writes are performed on each drive concurrently so the mirror is always up to date to the second.

9) If netware changes any files on the DOS partition (ncf files, nlm's etc) be sure to down the server and copy them to the other dos partition...Netware does not do it automatically.  Install will do this to startup.ncf and any patches you load may be stored on the c: drive.

I apologize for not having step by step instructions for you, I am at home and do not have a server here.  This should get you started and on the right track.  It is not a difficult process.  You will be ok.  Just watch some of the little things I mentioned...I have been caught on them when I was learning.

Nick
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Expert Comment

by:ncrosby
Comment Utility
Just some comments on the above solution and your problem:

1) note: A DOS drive can have 4 partitions.

2) Add the second drive as master on the second IDE channel.

3) Use fdisk to mske the dos partition (primary).  You have lots of room on the new drive so make it a bit bigger thatn the original.  xcopy the data from c:\ to the new drive.  Make a floppy disk, bootable, with fdisk on it.  If the original drive bites the dust, the server will not boot from the other drive.  You will have to remove the dead drive, boot from the floppy, make the dos partition on the backup drive the active partition then reboot. The system will then restart.

4) Use the Netware install utility to create the new Netware partition. (load install, choose the partitions option, create a new partition)  Make the new partition larger than the original.  Netware requires that the second partition be at least as big as the original.  It won't work if it is smaller.

5) Use the same utility (install) and go to the partitions section again.  Choose the mirror option.  Select the sys volume and follow the prompts/menu's to mirror it.  I do not have everything in fromt of me now, so I cannot give you the exact steps.  If I remember correctly, it is not too hard.   If you come up to a screen of mirrored drives and it is empty, press the  INS key to add your new mirror drive set.  By the way, mirroring and duplexing are very similar, you may be actually duplexing because your drives are technically on separate controllers.

5) Mirroring will start automatically.  It can take a long time.  It may take more than an hour on your system.

6) System commands: Type help at the console prompt to get a list of commands you can use.  Some of interest will be:
Abort remirror partition #
Remirror #
Mirror status
Again, exact syntax may differ as I do not have a server in fromt of me.  The mirror status command will give you the partition numbers you need for the other commands.

7) Netware will automatically give prompts on the screen when the drives are out of sync.  They will show every few minutes.  A single message will be displayed when the sync is established.

8) The mirror is not sytatic...it is dynamic.  Writes are performed on each drive concurrently so the mirror is always up to date to the second.

9) If netware changes any files on the DOS partition (ncf files, nlm's etc) be sure to down the server and copy them to the other dos partition...Netware does not do it automatically.  Install will do this to startup.ncf and any patches you load may be stored on the c: drive.

I apologize for not having step by step instructions for you, I am at home and do not have a server here.  This should get you started and on the right track.  It is not a difficult process.  You will be ok.  Just watch some of the little things I mentioned...I have been caught on them when I was learning.

Nick
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