dump hangs on 7.1

[Mel Flynn]

On Friday 10 July 2009 08:29:01 Len Conrad wrote:
> FreeBSD 7.1-RELEASE #0: Thu Jan  1 14:37:25 UTC 2009    
> root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
>
> CPU: Intel(R) Xeon(R) CPU           E5420  @ 2.50GHz (2496.26-MHz 686-class
> CPU) Origin = "GenuineIntel"  Id = 0x1067a  Stepping = 10
>   AMD Features=0x20100000<NX,LM>
>   AMD Features2=0x1<LAHF>
>   Cores per package: 4
> real memory  = 3484745728 (3323 MB)
> avail memory = 3405537280 (3247 MB)
> ACPI APIC Table: <DELL   PE_SC3  >
> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
>  cpu0 (BSP): APIC ID:  0
>  cpu1 (AP): APIC ID:  1
>  cpu2 (AP): APIC ID:  2
>  cpu3 (AP): APIC ID:  3
>
>
> /sbin/dump -0uanL -f - / | ssh dump_images at xxx.net dd
> of=/var/ftp/dump_images/mx1-root-test
>
> dump has completed only once. Several other dumps have all gotten under
> way, target file is created and increases until the hang.
>
> CTRL-C gets back to shell,eg:
>
>   DUMP: Date of this level 0 dump: Fri Jul 10 10:25:33 2009
>   DUMP: Date of last level 0 dump: the epoch
>   DUMP: Dumping snapshot of /dev/da0s1d (/usr) to standard output
>   DUMP: mapping (Pass I) [regular files]
>   DUMP: mapping (Pass II) [directories]
>   DUMP: estimated 1713942 tape blocks.
>   DUMP: dumping (Pass III) [directories]
>   DUMP: dumping (Pass IV) [regular files]
> ^C  DUMP: Interrupt received.
>   DUMP: Do you want to abort dump?: ("yes" or "no") Killed by signal 2.
>   DUMP: Broken pipe
>   DUMP: The ENTIRE dump is aborted.
>
> Hangs always in Pass IV

What's the output ps -auwwx|grep dump at the time of the dump.
-- 
Mel