Hi,

On 5/30/2007 9:15 PM, Ryan Novosielski wrote:
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> 
> [EMAIL PROTECTED] wrote:
>> Ryan,
>>
>>>     16: List Volumes likely to need replacement from age or errors
>>> Choose a query (1-16): Unexpected question has been received.
>>> 16
>>> No results to list.
>>>
>>> ...I currently have no such volumes, but the capability is there.
>>> However, there is nothing that retires them except operator
>> intervention
>>> (I instruct them to look at this e-mail and make the call). I would
>>> suggest a change of "Retired" though to "Archive," since it already
>> exists.
>>
>> Looking at the query.sql file where did the values of VolWrites >
>> 3999999 and VolMounts > 50 come from?
> 
> Someone in the Bacula project used that as a number.

Might have been me :-)

These values work for my DDS and DLT tapes. They definitely don't work 
for QIC tapes where I set smaller tape file sizes and (once) used block 
sizes of 1k :-)

Please take these values only as place holders for your situation!

> I've found that my
> DDS4's that go bad are basically always above that number, so it makes
> sense to me. It is a good question though -- maybe we'll see if someone
> responds.

As noted above, the values kind of work for DDS and DLT.

> 
>> I was poking around the manual and it looks like VolWrite is incremented
>> each time the maximum file size is reached. From the manual it says that
>> the default is 1GB, although I did see a message that stated the default
>> was 2GB. It appears that all of my volumes have volwrites > 3999999. I
>> have one tape that has over 30,000,000 VolWrites.
> 
> I believe it is 1GB -- not sure where you found the other thing.
> 
>> What should sensible values be for VolWrites and VolMounts be for LTO-2
>> tapes?
> 
> Don't know... you'd have to check your media for information on that, or
> perhaps someplace online that has recommendations for this. These values
> are fairly easily changed. I, for example, changed that query to exclude
> disk volumes, as it's pointless to be checking for volumes that do not
> wear out.

Difficult... depending on the customers needs, I have used values for 
VolMounts between 10 and 2000 :-)
VolWrites is more or less easily calculated: Say, we increment VolWrites 
once per GB. LTO tapes might have a typical compressed capacity of 280 
GB. That makes 280 VolWrites for a full tape, 20 full writes seeam 
reasonable for the customers needs, so I'd use 5600 as the limit here.

>> How can I check to see what the default value is for VolWrites?
> 
> What do you mean? The default "too many" value? All of this is in
> query.sql which is somewhere in the Bacula tree (should be pretty easy
> to dig up).

Arno

-- 
IT-Service Lehmann                    [EMAIL PROTECTED]
Arno Lehmann                  http://www.its-lehmann.de

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