Solved

Software mirroring

Posted on 2004-04-06
6
739 Views
Last Modified: 2010-04-19
I have set up a software mirror for by boot partition in Windows Server 2003.

1/. I know I can switch the disk around if one fails but it is also my belief that I can modifying the BOOT.INI to allow me to boot to either one without needing to open the case. What would be the correct syntax for two SCSI hard drives?

2/. Once booted off one or the other is there a way to tell which one I am booted off on? Somewhere in computer management maybe? I didn't see anything.
0
Comment
Question by:Gareth Gudger
6 Comments
 
LVL 20

Accepted Solution

by:
What90 earned 500 total points
ID: 10789318
1)  in boot.ini you should be able to make a change to a line like this
scsi(0)disk(0)rdisk(0)partition(1) (this being the current set up) to this
scsi(1)disk(0)rdisk(0)partition(1) (this being the new set up - by changing the SCSI number to the second disk's id windows should be able to use this to boot.

Further details on this:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;102873
http://support.microsoft.com/default.aspx?scid=KB;en-us;99743

2) - will just check a real sever and get back to you ;-)
0
 
LVL 20

Expert Comment

by:What90
ID: 10789341
Back again. As far as I'm aware the only way to check which disk your boot off in a RAID format is a third party util or looking at the Boot.ini file and seeing which disk Windows is using.
0
 
LVL 1

Expert Comment

by:lesmydad
ID: 10790559
in boot.ini you should be able to make a change to a line like this
scsi(0)disk(0)rdisk(0)partition(1) (this being the current set up) to this
scsi(1)disk(0)rdisk(0)partition(1) (this being the new set up - by changing the SCSI number to the second disk's id windows should be able to use this to boot.

0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 31

Author Comment

by:Gareth Gudger
ID: 10790583
When do I use multi() for SCSI?
0
 
LVL 31

Author Comment

by:Gareth Gudger
ID: 10790711
Ok, I figured it out.

I had my second disks SCSI ID set to 4. I set it to 1 and it already matched my boot.ini which I guess was correct in some aspects. I left the boot.ini using multi() instead and this seems to work fine.

Would be nice if disk management would tell you which one you are booted off. A nicety - maybe in Longhorn. :)


I am also wondering if it was partly due to my mirrors becoming unsynchronized as well.

However, I am going to award the points to What90 for the good articles.
0
 
LVL 3

Expert Comment

by:haresh-nyc
ID: 10820346
it was supposed to be multi() not scsi().

multi is almost always used with ide & scsi so long as the controller supports booting.
On the rare chance you use a scsi drive with a controller which does not support booting, like a 10 year old scsi card intended for accessories instead of real hard drives, it won't boot on that, and thus you'll have to boot off a boot floppy and specify the scsi( ) number.

by the way, the scsi ID of the device is not the number you use in the brackets in the multi ( ) or scsi ( ) commands.
The number needed is the actualy physical number of the device. i.e. the first physical hard drive is 0, the second drive is 1, and so on.

This is why your system worked when you used multi(1) and it booted off the second physical hard drive.

:)
-- smile --

haresh
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Setting up a Microsoft WSUS update system is free relatively speaking if you have hard disk space and processor capacity.   However, WSUS can be a blessing and a curse. For example, there is nothing worse than approving updates and they just have…
Learn about cloud computing and its benefits for small business owners.
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

832 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question