[blue68f100]

Very good questions, I have wondered that to. I have always recomend using the same hardware if at all posiable.

But your question is/has a different twist. This is what I believe but have not tested it.

All snaps v2 and up use the same disk structure. So a v3 os should read a v4 drive and vise versa.

To add another question to yours. Is the drive part of a RAID 1 Set????

I do not know if there is a difference between software Raid and hardware raid. If they use the same authorythem.... it should not make a differnce. But they may not, I dont know.

If a drive from a 2200 (v4.0.860, JBOD) installed as the slave in a 2000 (jbod) v3.4.805 what will happen? I'm not shure having not done this before. What I think will happen? You should be able to read the drive without any problem.

Installing the 2200 v4 jbod as master is not recomended. Snaps with flashram OS have extra software modules installed that is not on the 2200 models.

NOW WHAT WILL HAPPEN IF THE 2200 WAS IN RAID 1......

1. I would upgrade the OS in the 2000 to match the 2200 v4.0.860, if posable. V1 2000 will not run v4.0.860. some what. it has been reported on several cases that it slows the 2000 down to a snail pace. 4.0.830 does not have the problem.

2. If upgraded to the same OS, I would make sure the Snap is configured as a RAID 1. Install the 2200 drive in the master postion and see what happens. BEING WARE THAT THE 2000 MAY UPDATE THE OS. OR MAY TREAT IT AS A DEW DRIVE AND FORMAT IT. Don't think it will happen, but don't know.

3. If the 2000 is in RAID 1 failing the slave drive, then installing the 2200 drive as slave..... What will HAPPEN ?????
. a. Will know the raid is broken, will also know the drive is not part of its set, and may just mount the drive, May not BE READABLE, slice 50000. Without doing any thing to it. Normally if a clean drive is installed it will init and format the drive, but not repair the mirror.

4. If the 2000 is in RAID 1 failing the Master drive, then installing the 2200 drive as Master with NO drives from the 2000..... What will HAPPEN???????
. a. Since the 2200 drive is bootable, it may boot from it.
. b. May repair the OS to work with the 2000,
.... 1. Then the data may be read, or
.... 2. Or may not beable to read the data due to different aurgthrime..

5. If the 2000 is in RAID 1 failing the Master drive, then installing the 2200 drive as Master with the 2000 slave still in place..... What will HAPPEN???????
. a. It may try to boot from the 2200 (master) and auto roll to the slave drive.
.... 1. Slave drive should be readable, have know idea with Master?
. b. It may try to boot from the 2200 (master) and then repair the OS for 2000.
.... 1. So will the drive be readable??? Maybe
.... 2. If SO the Slave drive may not, Having 2 different 60000 slices.
...... a Will it attempt to repair the differences????
. c. So will the drive be readable if booted from the slave?
..... 1. Slave drive should be readable, have know idea with Master?
..... a. Having 2 different 60000 slices.

HAVE NO IDEA WOULD BE AN INTERESTING EXPERIMENT.

My best guess is 4 would be the most likely if in raid1.