On Sunday 14 December 2008 12:47:14 Florian Philipp wrote: > Then I would use it (and the older disk) in an LVM volume group. LVM > also supports mirroring (like RAID1) and striping (like RAID0) on a > per-volume basis. That means that you could keep most of your data > somewhere on the TB disk and still experiment with mirroring and > striping using both disks for partitions which need more speed or more > security.
LVM's support for mirroring and striping is exceptionally crude to say the least. You will also have problems if your stripes do not align with the underlying volume. Seeing as LVM is designed to make volume management easier and RAID is designed to provide redundancy, it is best to completely dispense with the mirror/stripe "features" of LVM and leave that to the thing that does it best - RAID - while letting LVM do what it does best - making your life infinitely easier with volume management. Plus, most built-in so-called hardware RAID solutions are utter crap and nothing worth the silicon they are built on. Linux software raid is many times better. Rule of thumb is that if the OS can see the underlying volumes that make up the RAID, you do not have real hardware RAID. You instead have something else that a marketing person decided would be cute if it were called hardware RAID. Calling a duck a swan does not make it anything other than a duck ;-) -- alan dot mckinnon at gmail dot com
