Re: Dump failure

From: Kris Kennaway (kkenn_at_xor.obsecurity.org)
Date: 12/30/04 

Date: Thu, 30 Dec 2004 18:59:55 GMT

On 2004-12-30, Steven Maesslein <nobody@nowhere.invalid> wrote:
> On Thu, 30 Dec 2004 14:28:20 +0000, Simon coughed into
> comp.unix.bsd.freebsd.misc and left this in <BDF9C104.3893%ask@me.com>:
>
>> DUMP: write error 4194340 blocks into volume 1
>>
>> Broadcast Message from root
>> (/dev/ttyp0) at 14:17 GMT...
>>
>> Message from the dump program to all operators
>>
>> DUMP: NEEDS ATTENTION: write error 4194340 blocks into volume 1
>> DUMP WRITE ERROR!
>
> Could this be a 32-bit integer overflow issue?
>
> The 4194340 you mention is suspiciously close to 2^32 / 1K,
> IOW 2^22 = 4194304

OP forgot to mention what version he's running - if it's very old,
this might be possible. I'd be surprised if modern versions had a bug
like this though (lots of people dump to tapes > 4GB in size), unless
there's something else esoteric going on.

Kris