mbr / disklabel / ata regression in recent -CURRENT

[Dag-Erling Smørgrav]

I have a box with the following partition table on ar0:

#   flag     start chs   type       end chs       offset         size
1   0x00      0:  1: 1   0xde      8:254:63           63       144522
2   0x00      9:  0: 1   0x07   1023:254:63       144585    409609305
3   0x80   1023:  0: 1   0xa5   1023:254:63    409753890    409609305
4   0x00   1023:  0: 1   0xa5   1023:254:63    819363195    157196025

ar0s3 has the following label:

#        size   offset    fstype   [fsize bsize bps/cpg]
  a:  8388608       16    4.2BSD     2048 16384 28552
  b:  8388608  8388624      swap
  c: 409609305        0    unused        0     0
  d: 16777216 16777232    4.2BSD     2048 16384 28552
  e: 16777216 33554448    4.2BSD     2048 16384 28552
  f: 67108864 50331664    4.2BSD     2048 16384 28552
  g: 292168777 117440528    4.2BSD     2048 16384 28552

ar0s4 has the following label:

#        size   offset    fstype   [fsize bsize bps/cpg]
  a: 157196009       16    4.2BSD     2048 16384 28552
  c: 157196025        0    unused        0     0

-CURRENT from May 1st has no trouble with this.  More recent -CURRENT
is unable to locate and mount filesystems from ar0s3, while ar0s4
presents no problem.

Neither geom_mbr nor geom_bsd seem to have changed in that interval,
so I'm wondering if this may be an ata problem...

DES
-- 
Dag-Erling Smørgrav - des at des.no