Hi, Am Sonntag, den 05.02.2012, 14:44 +0100 schrieb Michał Dwużnik:
> keep in mind that members of software RAID, lvm physical volumes and > so on may house the data despite zeroed out first sector: > > #dd if=/dev/md0 of=file count=1 > 1+0 records in > 1+0 records out > 512 bytes (512 B) copied, 0.00886503 s, 57.8 kB/s > > #dd if=/dev/zero of=zero count=1 > 1+0 records in > 1+0 records out > 512 bytes (512 B) copied, 6.3684e-05 s, 8.0 MB/s > > #diff file zero > # thanks. > md0 is a perfectly healthy device, btw... > (LVM housing the root filesystem of the machine I used for that example...) > > cat /proc/mdstat > Personalities : [raid1] > md0 : active raid1 sdc4[1] sdb4[0] > 64725760 blocks [2/2] [UU] > > unused devices: <none> > > PV /dev/md0 VG fatvg lvm2 [61.73 GiB / 17.73 GiB free] > > > > Making assumptions on the basis of the first sector (which you seem to > make due to > 'clean the disk with dd if=/dev/zero of=/dev/sda count=1') > would actually destroy most of machines I call 'mine', so please > forgive me the warning. OK seems that I have to look for a better solution. Anyone a better idea? regards Andreas Schockenhoff
