volume mirroring question

[Tester]

Hi there,
I just created a volume mirror on a W2K server, here is the boot.ini.
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINNT
default=multi(0)disk(0)rdisk(1)partition(1)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows 2000 Server"
/fastdetect
multi(0)disk(0)rdisk(1)partition(1)\WINNT="Microsoft Windows 2000 Server"
/fastdetect

Curiously enough if I unplug drive0, SCSI ID=0 it still boots off the other
hard drive SCSI ID=2 and same with a boot floppy it still boots with first
option(rdisk(0)) highlighted.
Disks are duplexed, first(id 0) connected to an Adaptec 2940UW and second(id
2) connected to the built in scsi controller.
Thanks, Calin

 

[Ryan Anderson [MSFT]]

Hello Calin,

With disk duplexing, you use the multi value to determine which controller
the system boots too. The order they are enumerated is determined in the
system BIOS. It sounds like you are currently booting to disk on the onboard
controller regardless the other disk being connected. Also the disks are
enumerated per controller, so assuming that you have only one disk connected
to each controller, the rdisk value would be (0) for each line. Here is the
correct syntax for your boot.ini:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows 2000 Server"
/fastdetect
multi(1)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows 2000 Server"
/fastdetect

The other thing that can be very usefull in troubleshooting boot.ini files
is to use a better description for each line like below:
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Multi 0 - Default Install"
/fastdetect
multi(1)disk(0)rdisk(0)partition(1)\WINNT="Multi 1 - Shadow"
/fastdetect

Here is an article that goes into detail on the boot.ini:
119467 How to Create a Bootable Disk for an NTFS or FAT Partition
http://support.microsoft.com/?id=119467

Hope this helps you out!


--

Ryan Anderson MCSE
Directory Services
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