> > Hi, ubuntu 14.04, and a 5TB RAID (sdc) partitioned into two 2.5TB partitions > > (sdc1 and sdc2) with parted to be used as backing devices, > > > /dev/sdc2 attaches fine > > > problem with sdc1: > > > # make-bcache -B /dev/sdc1 > > Device /dev/sdc1 already has a non-bcache superblock, remove it using wipefs > > and wipefs -a > > > # wipefs /dev/sdc1 > > wipefs: WARNING: /dev/sdc1: appears to contain 'dos' partition table > > > # wipefs -a /dev/sdc1 > > wipefs: WARNING: /dev/sdc1: appears to contain 'dos' partition table > > Did you try wipefs -a -f /dev/sdc1 ? my wipefs does not have a -f option > If that fails, just erase the first few MB of the device with zeroes: > > dd if=/dev/zero of=/dev/sdc1 bs=1M count=10 I had tried this, but I see now that I copied from /dev/null instead of /dev/zero and no data got copied :) so, yes, your suggestion dd if=/dev/zero of=/dev/sdc1 bs=1M count=10 fixed it thank you Pavel! /Erik -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
