On Tue, Jun 18, 2019 at 5:37 PM shadrock uhuru <niyal...@gmail.com> wrote: > > hi everyone > my keydisk is on a compactflash sandisk ultra 2 card, > which was created during disk encryption > > doas disklabel sd1 > # /dev/rsd1c: > type: SCSI > disk: SCSI disk > label: USB CARD READER > duid: ea53e532b5ae2a0f > flags: > bytes/sector: 512 > sectors/track: 63 > tracks/cylinder: 255 > sectors/cylinder: 16065 > cylinders: 31 > total sectors: 501760 > boundstart: 64 > boundend: 498015 > drivedata: 0 > > 16 partitions: > # size offset fstype [fsize bsize cpg] > a: 16001 64 RAID > c: 501760 0 unused > > > i boot my laptop (samsung np300e5A) with this connected to a card > reader connected to a usb port and i'm able to boot without a problem > > I HAVE A cruzer memory stick to use as a BACKUP keydisk > > doas disklabel sd3 > # /dev/rsd3c: > type: SCSI > disk: SCSI disk > label: Cruzer Fit > duid: 7fe58412fc668f9e > flags: > bytes/sector: 512 > sectors/track: 63 > tracks/cylinder: 255 > sectors/cylinder: 16065 > cylinders: 972 > total sectors: 15630336 > boundstart: 64 > boundend: 15615180 > drivedata: 0 > > 16 partitions: > # size offset fstype [fsize bsize cpg] > a: 16001 64 RAID > c: 15630336 0 unused > > using the backup instruction on the openbsd faq i create an image of the > keydisk > > dd bs=8192 skip=1 if=/dev/rsd1a of=backup-keydisk.img > > 999+1 records in > 999+1 records out > 8184320 bytes transferred in 2.251 secs (3634754 bytes/sec) > > i restore the image to the backup usb memory stick using > > dd bs=8192 seek=1 if=backup-keydisk.img of=/dev/rsd3a > > 999+1 records in > 999+1 records out > 8184320 bytes transferred in 1.744 secs (4690370 bytes/sec) >
I might be speaking out of turn here, but I'm pretty sure you want to dd rsdXc, that images the entire disk, not just the a partition. > > when i try to boot off the backup usb memory stick i get > using drive 0 partition 3 > no os > > i tried to verify the keydisk image with diff using > > doas diff /dev/rsd1a backup-keydisk.img > Binary files /dev/rsd1a and backup-keydisk.img differ > --- > > is there a problem with the hardware combination of usb sticks i use for > keydisk backup > or the commands i use especially the diff command to try and verify the image > file ? > > shadrock >
