Bug 16411

Summary: DUMP freezes system if uucico or samba writes during the dump
Product: Base System Reporter: jhanna <jhanna>
Component: i386Assignee: freebsd-bugs (Nobody) <bugs>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 3.3-RELEASE   
Hardware: Any   
OS: Any   

Description jhanna 2000-01-27 22:00:01 UTC 
Hi. I run dump nightly to backup my files to a second disk drive, something like this:

dump -0 -a -f - / |gzip >/backup/larryboy/larryboy.root.dump.gz
dump -0 -a -f - /usr |gzip >/backup/larryboy/larryboy.usr.dump.gz

In the middle of this process the system locked up. I had to
push the reset key to bring it back. UUCICO was also running about the same time as the backup. I've also had crashes with Samba accesses. I've compiled the kernel with debug and tried to force a panic but it doesn't panic.

Fix: 

I've switched to TAR in place of DUMP on the active partition and have not crashed since then. I'm hoping the problem will go away with 4.0's ATA driver, but haven't tested it -- I'm waiting for 4.0 or 4.1 release.
How-To-Repeat: Try
dump -0 -a -f - /usr |gzip >/secondHD/larryboy.usr.dump.gz

from one wd drive to another and set up UUCICO to run during the dump, or try writing some files with Samba to the folder being dumped.

It's quite repeatable for me, but it could be hardware specific:
  SMP, primary and slave IBM drives on wd0
Comment 1 iedowse freebsd_committer freebsd_triage 2001-08-12 23:06:24 UTC 
State Changed
From-To: open->feedback


Does this still occur with more recent releases?
Comment 2 Kris Kennaway freebsd_committer freebsd_triage 2002-01-06 04:05:48 UTC 
State Changed
From-To: feedback->closed

Feedback timeout