On Thu, 2005-08-18 at 12:47, Robert Hanson wrote: > and so, if i load and config the 1850R with 4 scsi drives in raid5 array > and get functional with CentOS, let's say i want to take all 4 drives and > stuff them in correct order in a dl380 *cold*... > > possibly different SCSI controllers.... yet nothing CentOS couldnt handle > IMHO... First, most SCSI or SATA based RAID controllers put some, if not all. the config info for the array on one or all of the drives. At boot they load this info so they know how the array is set up. Each different MFG uses a different table type to do this :( . With this said, if your first RAID 5 controller is made by (pick one) LSI Logic and you try to put these drives into a system with a (pick any other one) adaptec controller you will have NO LUCK. Second, The only way your drive migration is going to be seamless (really just move the drives and boot) is if: 1) RAID controllers are the same and running the same level of firmware. different levels of firmware may store different config parameters in a different order - but might migrate ?? 2) Same motherboard and chipset with same BIOS revision. 3) BIOS is set up identically so that the RAID array is the same device and in the same position in the boot order. Swap is hard coded into fstab and if the array is a different logical drive the O/S may not be able to mount swap This is not a Centos limitation, it's an operating system / BIOS / boot sequence function. Hope this helps Seth Bardash Integrated Solutions and Systems 1510 North Gate Road Colorado Springs, CO 80921 719-495-5866 719-495-5870 Fax 719-337-4779 Cell http://www.integratedsolutions.org Failure can not cope with perseverance! -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.10.12/77 - Release Date: 8/18/2005