Hi all, this question is only partially related to Linux MD, but since the experts are here, I think it would not be a big problem to ask here. I'm considering a storage system. This is based on HDD "rust". It should have RAID-6, for protection agaist disk failure(s). It should have LUKS (or similar), in order to simplify HDD disposal (disk that are still somehow readable will not need to be wiped out before dumping them). It should have LVM, as flexible partition system. Now, given that the HDD are always the lower layer, the others can be combined in any order. Six possible combinations, specifically, naming: H: HDD R: RAID E: encryption L: LVM We can have: HREL HRLE HLRE HLER HERL HELR Those are all possible (and valid) configurations. Some are "better" and some are less "good", depending on "good" or "bad" definition. For example, in term of pure performances, I tested HREL vs. HERL, the first is quite faster than the second one. On the other hand, HERL encrypts the RAID header, so delivers less information to whoever wants to check the disk content. HRLE gives the possibility of having volumes encrypted separately, allowing a finer security control. HLxy, I think, do not really offer any advantage, but I'm not sure. So, finally, the question would be: Knowing that it depends on requirements, do you think one of this configuration is better than the other? Why? Feel free to elaborate, if you like. Thanks a lot in advance, -- piergiorgio -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
