Can I test disk slot 1 in Ultra 6+?

Hi,

I have an Ultra 6+ which had four 3 TB drives in slots 1-4, configured as a single x-raid-2 volume. All drives on HCL

Yesterday I got a disk failed error for the disk in slot 1, a seagate ST3000DM001. Data was fine, but array was non-redundant. I had a spare, new, drive of the same model, so I hot swapped it into slot 1. The new drive, however, was not recognized by the system.

I put the new drive in slot 5, where it was recognized, and my array was rebuilt and is now redundant. Slot 1 is empty.

I tested the failed drive offline, and it is completely dead.

I'm pretty sure that my problem was simply a failed drive, and the failure to recognize the new drive when I first put it in slot 1 was a glitch, but I wish to confirm that slot 1 works.

Can I do the following without jeopardizing my data (my crucial data is fully backed up, twice, but there is some non crucial data which is too large to backup, but would be nice to keep)

1) Label the 4 drives and power down the system, and remove the drives with my data that are in slots 2-5
2) Insert a new "test" drive in slot 1 and see if the system recognizes it and configures it
3) If slot 1 is OK, I'll power down the unit, then remove the test drive from slot 1, and reinsert my data drives into their original locations in slots 2-5

Thanks!