I have to tell the back story...

Over the long weekend I went to the data center to remove 2 300 GB SAS drives (in RAID 1) and put 2 new SSDs (in RAID 1) in R630 server. 

Since SAS to SSD is not a straight swap in RAID 1, and because this drive contained ESXI OS, I knew I was going to be there for a couple of hours.

However, in my ignorance/carelessness (well it ruined my weekend plans), I forgot to delete the old RAID 1 array. I shutdown the server, removed the drives, and put the new ones in. Then I booted up the server. 

oh boy.. 

Fortunately for me, this is a new server and has not been used much, but we had a few VMs on it (none were critical). 

But as soon as I booted up the server, the server did not see any RAID arrays - there were 4 total RAID 1 arrays, I removed/replaced one so I knew that did not exist, but the other 3 went missing as well.

How? Why? 

Since this was a new server, I proceeded to rebuild the arrays, but if this was prod, what steps should I have taken to recover the RAID 1? 

I had read that the PERC would identify that the disk belonged to a RAID and ask to recover, but I did not get any such notification. Should I have gone to CTRL+ R and tried from there first? 

Anyhow I am looking for guidance on right way to recover a Raid 1 or Raid 10 as I would not be so lucky next time...