on 6-7-2008 9:35 AM drew einhorn spake the following: > I remember seeing one with an example migrating > from an old fashioned filesystem on a partition > to a new filesystem on a mirrored lvm logical volume > but one only one side of the mirror is set up at this > time. > > First I need to copy stuff from what will become > the second side of the mirror > to filesystem on the first side or the mirror > > Then I will be ready to follow the rest of the tutorial > and build and attach the second side of the mirror. > > Wish I could remember where I saw that tutorial. > > Want to embellish the example and stripe each side > of the mirror. > > Understanding a mirrored pair of stripes, > seems easier than > understanding a striped pair of mirrors. > > But this seems like a place where > counterintuitive results are not a big surprise. > > I can do mirroring and striping in lvm, mdadm, > or a hardware raid controller. There are lots of > configurations to ponder. > > What about recovery after a hardware raid controller? > > What are the chances of being able to replace the controller > and start up successfully from drives? I know that assuming > the failed controller did write bad stuff to the drives while > it was crashing and burning. > > I would not be surprised if the controller firmware revisions > had to match. I would be surprised but not astonished if > the board hardware revision level had to match, too. > I hope we are past those days. > > Anybody know about the > LSI Logic MegaRAID 8480 Storage controller > in particular. > I know that with 3ware controllers, they are always backward compatible, and will sell you a controller that will work. As to the "bad" activity, nothing will mitigate backups. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!! -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 258 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20080609/b3e11b48/attachment-0004.sig>