trying to whack a glabel for a zfs mirror

[Randy Bush]

as usual, i am a bit clueless here.

NAME                STATE     READ WRITE CKSUM
tank                DEGRADED     0     0     0
  mirror            DEGRADED     0     0     0
    label/m00-d01   REMOVED      0     0     0
    label/m00-d00   ONLINE       0     0     0
  mirror            ONLINE       0     0     0
    label/m01-d00   ONLINE       0     0     0
    label/m01-d01c  ONLINE       0     0     0
  mirror            ONLINE       0     0     0
    label/m02-d00c  ONLINE       0     0     0
    label/m02-d01c  ONLINE       0     0     0
  mirror            ONLINE       0     0     0
    label/m03-d00   ONLINE       0     0     0
    label/m03-d01c  ONLINE       0     0     0
  mirror            ONLINE       0     0     0
    label/m04-d00   ONLINE       0     0     0
    label/m04-d01   ONLINE       0     0     0
  mirror            ONLINE       0     0     0
    label/m05-d01   ONLINE       0     0     0
    label/m05-d00   ONLINE       0     0     0

Geom name: da2s3
Providers:
1. Name: label/m00-d01
   Mediasize: 1965957073408 (1.8T)
   Sectorsize: 512
   Mode: r0w0e0
   secoffset: 0
   offset: 0
   seclength: 3839759909
   length: 1965957073408
   index: 0
Consumers:
1. Name: da2s3
   Mediasize: 1965957073920 (1.8T)
   Sectorsize: 512
   Mode: r0w0e0

# zpool attach tank label/m00-d00 label/m00-d01
cannot use '/dev/label/m00-d01': must be a GEOM provider or regular file

# glabel label m00-d01 /dev/da2s3
glabel: Can't store metadata on /dev/da2s3: Invalid argument.

# sysctl kern.geom.debugflags=17
kern.geom.debugflags: 0 -> 17

# dd if=/dev/zero of=/dev/da2s3
dd: /dev/da2s3: Invalid argument

randy