Hi all, I have a raid5 with 4 drives: sda, sdb, sdc, sdd. While I was in vacations sdb powered off (I guess a thermal issue). Anyway, the raid continued for several days in decreaded mode. One day before being able to replace the powered off drive, sdd, a second drive, broke (lots of read errors, including the raid superblock). sdb (the first drive) works, but it is several days behind the other 3. I thought the best way to get the most out of a possible reconstrution, is to ddrescue as much of sdd to sdb the then attempt to re-assemble the array with the 3 drives (2 fully functional + sdb with as much of sdd's data as possible), hopping that if I am lucky, the parts that cannot be read from sdd, will exist in sdb and may not have been changed in the few days that sdb was offline. Is this going to work? Can I just "mix" data from 2 raid-5 drives to build an operational copy of the failed drives? Thanks. Costa PS: I have backup of important data, and I already have restored operations. However the array was also hosting a few TB of nice-to-have data, never backed up, which I am trying to rescue if possible. -- 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
