Upgrading ml370 SCSI drives?

http://www.hp.com/bizsupport/detailpages/hot_topic/scsi_customer_advisory.html

http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&locale=en_US&docIndexId=179911&taskId=115&prodTypeId=15351&prodSeriesId=254940

I am not familiar with this product line, but here are a couple of links for some lite reading on your system

You will need to build a separate RAID array with the 72.8GB drives and copy the data to it.  Ghost is not advertised as being able to do it (http://service1.symantec.com/SUPPORT/ghost.nsf/docid/1999010613522725&src=w), so you will need another product to do this (perhaps XClone?  I have not used it).  If you want to use the 18.2 and 72.8 drives as part of one array, that would not be advisable because RAID arrays will only use the capacity of the smallest size drive in the array.  You can use them as a second array, or as just a bunch of drives (JBOD).

Here's a question someone else asked about cloning a RAID-5 array: https://www.experts-exchange.com/questions/20831960/Ghosting-a-RAID-5-Array.html

Since it's set at RAID 5, could I possibly trick the computer into thinking that the 18.2 GB drives are failing and it will start transferring all of its data to the 72.8 drives?

One other thing, our OS is on the 18.2 drives.

Ok, thanks for the help, i'll give it a shot.