On Fri, Oct 09, 2026 at 01:14:35PM +0200, ????????? wrote: > I also used the hex dump to confirm, as suggested by Crystal. > Unfortunately, her suggestion of using a hex editor has no chance. > There is a checksum in softraidvar.h: sr_metadata.ssd_checksum, right near > sr_metadata._sdd_invariant.ssd_vol_flags, where the BIOC_SCBOOTABLE flag > apparently resides.
The checksum is just the md5 of the first 96 bytes starting at where you see 'marcCRAM': # hexdump -C disk_block 00000000 6d 61 72 63 43 52 41 4d 06 00 00 00 04 00 00 00 |marcCRAM........| 00000010 29 c5 9c f7 98 0e 46 64 b8 ce 63 31 ac 33 1e ae |).....Fd..c1.3..| 00000020 01 00 00 00 00 00 00 00 01 00 00 00 00 02 00 00 |................| 00000030 04 00 00 00 43 00 00 00 f0 f5 ff 7f 03 00 00 00 |....C...........| 00000040 4f 50 45 4e 42 53 44 00 53 52 20 43 52 59 50 54 |OPENBSD.SR CRYPT| 00000050 4f 00 00 00 00 00 00 00 30 30 36 00 00 00 00 00 |O.......006.....| 00000060 41 ec c5 2d 3a 12 da ee 55 45 a7 68 54 d1 f7 c7 |A..-:...UE.hT...| ... # dd if=disk_block bs=96 count=1 | md5 1+0 records in 1+0 records out 96 bytes transferred in 0.000 secs (1659091 bytes/sec) 41ecc52d3a12daee5545a76854d1f7c7 Note the output from md5 matches the last line of the hex dump.
