gmirror 6.2 -> 7.1

[Iv Ray]

Hello everyone,

Do you think the following way to upgrade gmirror 6.2 -> 7.1 is safe  
for the average person?

(The server is in a remote data center without physical console access.)

1. Backup
2. Remove one of the two SCSI HDDs from the gmirror
3. Install 7.1 on the removed HDD
4. Instruct the boot loader to boot from the 7.1 HDD
5. Reboot
6. Copy data
7. Clean the 6.2 HDD
8. Apply gmirror on 7.1 and add the former 6.2 HDD

Thank you,
Iv