sparc64 gmirror crash

(da0:mpt0:0:0:0): CAM status: CCB request terminated by the host
(da0:mpt0:0:0:0): Retrying command
(da1:mpt0:0:1:0): READ(10). CDB: 28 00 07 21 fa 80 00 00 10 00
(da1:mpt0:0:1:0): CAM status: CCB request terminated by the host
(da1:mpt0:0:1:0): Retrying command
(da1:mpt0:0:1:0): WRITE(6). CDB: 0a 00 5e 9a 01 00
(da1:mpt0:0:1:0): CAM status: CCB request terminated by the host
(da1:mpt0:0:1:0): Retrying command
(da0:mpt0:0:0:0): WRITE(6). CDB: 0a 00 5e 9a 01 00
(da0:mpt0:0:0:0): CAM status: CCB request terminated by the host
(da0:mpt0:0:0:0): Retrying command
(da1:mpt0:0:1:0): READ(10). CDB: 28 00 07 21 fa 80 00 00 10 00
(da1:mpt0:0:1:0): CAM status: CCB request terminated by the host
(da1:mpt0:0:1:0): Error 5, Retries exhausted
(da1:mpt0:0:1:0): WRITE(6). CDB: 0a 00 5e 9a 01 00
g_vfs_done():(da1:mpt0:0:1:0): CAM status: CCB request terminated by the host
(da1:mpt0:0:1:0): Retrying command
mirror/gm0a[READ(offset=61269671936, length=8192)](da0:mpt0:0:0:0): WRITE(6). CDB: 0a 00 5e 9a 01 00
error = 5
(da0:mpt0:0:0:0): CAM status: CCB request terminated by the host

(da0:mpt0:0:0:
FreeBSD/sparc0): Retrying command
64 (sparc.orange(da1:mpt0:0:1:0): WRITE(6). CDB: 0a 00 5e 9a 01 00
.bsdrp.net) (tty(da1:mpt0:0:1:0): CAM status: CCB request terminated by the host
u0)

login: (da1:mpt0:0:1:0): Error 5, Retries exhausted
(da0:mpt0:0:0:0): WRITE(6). CDB: 0a 00 5e 9a 01 00
(da0:mpt0:0:0:0): CAM status: CCB request terminated by the host
(da0:mpt0:0:0:0): Error 5, Retries exhausted
GEOM_MIRROR(da1:mpt0:0:1:0): READ(10). CDB: 28 00 07 0c 60 90 00 00 08 00
: (da1:mpt0:0:1:0): CAM status: CCB request terminated by the host
Request failed (error=5).(da1: mpt0:0:da0[WRITE(offset=12399616, length=512)]1:
0): g_vfs_done():Retrying command
mirror/gm0a[WRITE(offset=12399616, length=512)]error = 5
(da1:mpt0:0:1:0): READ(10). CDB: 28 00 07 0c 60 90 00 00 08 00
panic: cannot reassign paging buffer

cpuid = 0
KDB: stack backtrace:
panic() at panic+0x1d4
reassignbuf() at reassignbuf+0x50
bdirty() at bdirty+0x2c
brelse() at brelse+0xa4
bufwrite() at bufwrite+0x1b0
ffs_bufwrite() at ffs_bufwrite+0x3ac
softdep_process_journal() at softdep_process_journal+0x9b0
jwait() at jwait+0x118
flush_deplist() at flush_deplist+0x30
softdep_sync_metadata() at softdep_sync_metadata+0x2c8
ffs_syncvnode() at ffs_syncvnode+0x5c
ffs_fsync() at ffs_fsync+0x2c
VOP_FSYNC_APV() at VOP_FSYNC_APV+0x94
sys_fsync() at sys_fsync+0x1d4
syscall() at syscall+0x320
-- syscall (95, FreeBSD ELF64, sys_fsync) %o7=0x107058 --
userland() at 0x405a0948
user trace: trap %o7=0x107058
pc 0x405a0948, sp 0x7fdffffd7b1
pc 0x1024a4, sp 0x7fdffffe3e1
pc 0x4020d8f4, sp 0x7fdffffe4a1
done
KDB: enter: panic
[ thread pid 2200 tid 100498 ]
Stopped at      kdb_enter+0x80: ta              %xcc, 1
db> bt
Tracing pid 2200 tid 100498 td 0xfffff80003c2f6d0
panic() at panic+0x218
reassignbuf() at reassignbuf+0x50
bdirty() at bdirty+0x2c
brelse() at brelse+0xa4
bufwrite() at bufwrite+0x1b0
ffs_bufwrite() at ffs_bufwrite+0x3ac
softdep_process_journal() at softdep_process_journal+0x9b0
jwait() at jwait+0x118
flush_deplist() at flush_deplist+0x30
softdep_sync_metadata() at softdep_sync_metadata+0x2c8
ffs_syncvnode() at ffs_syncvnode+0x5c
ffs_fsync() at ffs_fsync+0x2c
VOP_FSYNC_APV() at VOP_FSYNC_APV+0x94
sys_fsync() at sys_fsync+0x1d4
syscall() at syscall+0x320
-- syscall (95, FreeBSD ELF64, sys_fsync) %o7=0x107058 --
userland() at 0x405a0948
user trace: trap %o7=0x107058
pc 0x405a0948, sp 0x7fdffffd7b1
pc 0x1024a4, sp 0x7fdffffe3e1
pc 0x4020d8f4, sp 0x7fdffffe4a1
done
db>