Disk Mirroring

[Mike Davies]

Hi,

I've just setup disk mirroring on two 36Gb 15,000 RPM SCSI drives. It's the
system disk that is mirrored.

I've got Windows2000 Advanced Server, MS Exchange 2003 and running it as a
domain controller.

There is nothing going much accessing the server but the Disk Write % time
on the mirrored drive never drops below 70% while the % Read time on the
primary drive never drops below 10%.

In taks manager, no process is increasing the I/O Bytes Read or Write, so
what is being written?

I can only assume that the mirroring is doing this but I dont know what it's
writing or if it will badly effect my I/O performance.

Is this normal? Should I consider removing mirroring?

Thanks

Michael

 

[Bjorn Landemoo]

Mike

What is the status of the mirror in disk management? It might take some
time before the mirror is fully initialized. During this process, all data
from one of the disks is copied to the other. For large disks, this process
can take hours, and performance will be reduced during this time.

Best regards

Bjorn