> On Fri Dec 11, 2009 at 02:55:31PM +0000, Cat'Killer wrote: > >> I found a way using Doug Gilbert's great sg3utils to zero all these >> disks in a very efficient manner, using sgp_dd, at near drive >> bandwidth, and proceeded to zero all the disks fully in about 4 hours! >> >> Once done, I then created a RAID 5 on 10 disks, waited for the rebuild >> to complete, stopped the array using mdadm, and dumped each of the >> RAID's components superblocks to files. >> > <-snip-> >> >> The create worked fine and I waited for the rebuild to be complete >> before stopping the array and dumping the SBs. >> >> I then proceeded to write these same superblocks to 10 new similar >> disks in a different system. >> > You could just do the create with --assume-clean, which should take very > little time at all. If the drives were zeroed initially then this will > give you valid parity data. > Thank you for this, that's exactly what I was looking for. I had looked in the manpage beforehand but I did not search for the right terms nor assumed this would work in case of an array created ontop of zeroed drives. Thanks again. Ben. > Cheers, > Robin > > -- > ___ ( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> > | > / / ) | Little Jim says .... | > // !! | "He fallen in de water !!" | > > > -- 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
