Janos Haar wrote: > At this time, i working in my data recovery company, and some times need Ah - I missed this too. > to recover the broken hw raid arrays too. > (with md arrays, we have no problem at all. :-) ) Nice quote for "the benefits of software raid" somewhere :) > In your rows, we talking about 2 cases: > > a, disk hw problem (only bad sectors, the completely failed disk is in > 'b' case) > Yes, the ddrescue is the best way, to do the recovery, but: > The ddrescue is too agressive with default -e 0 setting! > This can be easily fail down the drive! (dependig the reason of the bad > sectors) OK, worth knowing - what would you suggest? > And with the images, we have another problem! > The 0x00 holes. > The hw or md have no deal about where we need recover from parity and > where we have real zero blocks.... > Overall this is why data recovery companys learning and developing more > and more.... :-) Hmm - I wonder if things like ddrescue could work with the md bitmaps to improve this situation? Is this related to David Lethe's recent request? > I need no help at this time, i just want to share my ideas, to helping > upgrading/developing md, and helping for people.... OK - ta. David -- 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
