dump hangs on 7.1

[Len Conrad]

>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.

when the dump hangs:

ps auxww | grep dump

root    61360  0.0  0.0  3128  1168  p0  I+    1:47PM   0:00.06 /sbin/dump -0uanL -f - / (dump)

root    61361  0.0  0.1  5560  2768  p0  I+    1:47PM   0:03.65 ssh xxx at xxx.net dd of=/var/ftp/dump_images/mx1-root-test

root    61364  0.0  0.0  3128  1528  p0  I+    1:47PM   0:00.36 dump: /dev/da0s1a: pass 4: 92.66% done, finished in 0:00 at Sun Jul 12 13:47:52 2009 (dump)

root    61365  0.0  0.0  3128  1184  p0  I+    1:47PM   0:00.29 /sbin/dump -0uanL -f - / (dump)

root    61366  0.0  0.0  3128  1184  p0  I+    1:47PM   0:00.29 /sbin/dump -0uanL -f - / (dump)

root    61367  0.0  0.0  3128  1184  p0  I+    1:47PM   0:00.29 /sbin/dump -0uanL -f - / (dump)

root    61382  0.0  0.0  1660   900  p1  R+    1:48PM   0:00.00 grep dump

========

btw, with dump and dar failing, I tried rdiff-backup which succeeded.

Thanks
Len