running mksnap_ffs

Willem Jan Withagen wjw at
Tue Jan 2 15:20:16 PST 2007

Gary Palmer wrote:
> On Tue, Jan 02, 2007 at 09:06:24PM +0100, Willem Jan Withagen wrote:
>> Hi,
>> I got the following Filesystem:
>> Filesystem    Size    Used   Avail Capacity iused     ifree %iused 
>> /dev/da0a     1.3T    422G    823G    34%  565952 182833470    0%
>> Running of a 3ware 9550, on a dual core Opteron 242 with 1Gb.
>> The system is used as SMB/NFS server for my other systems here.
>> I would like to make weekly snapshots, but manually running mksnap_ffs 
>> freezes access to the disk (I sort of expected that) but the process 
>> never terminates. So I let is sit overnight, but looking a gstat did not 
>> reveil any activity what so ever...
>> The disk was not released, mksnap_ffs could not be terminated.
>> And things resulted in me rebooting the system.
>> So:
>>  - How long should I expect making a snapshot to take:
>> 	5, 15, 30min, 1, 2 hour or even more???
>>  - How do I diagnose the reason why it is not terminating?
> You forgot to mention what revision of FreeBSD you are running, and
> if you are using quotas or anything else on the filesystem that
> could impact this.

Yes, I pressed send somewhat to fast:

[~] wjw at bigsurf> uname -a
27 15:57:20 CEST 2006     wjw at 


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