Hi,

28.12.2007 01:45,, pedro moreno wrote::
> On Dec 18, 2007 12:56 AM, Arno Lehmann <[EMAIL PROTECTED]> wrote:
...
>>>    I use the command query option 16 and receive this data:
>>>
>>> +---------------+--------+--------+------------+--------+
>>> | Volume        | Mounts | Errors | Writes     | Status |
>>> +---------------+--------+--------+------------+--------+
>>> | FullTape-0007 |     10 |      0 | 19,008,158 | Full   |
>>> | FullTape-0015 |      3 |      0 |  4,982,277 | Used   |
>>> | FullTape-0014 |      3 |      0 |  5,149,360 | Used   |
>>> | FullTape-0004 |      3 |      0 |  4,796,619 | Used   |
>>> | FullTape-0001 |      3 |      0 |  5,153,608 | Used   |
>>> | FullTape-0013 |      5 |      0 |  8,990,607 | Used   |
>>> | FullTape-0011 |      7 |      0 | 10,309,906 | Used   |
>>> | FullTape-0010 |      9 |      0 | 13,201,649 | Used   |
>>> | FullTape-0009 |      9 |      0 | 18,643,901 | Used   |
>>> | FullTape-0008 |      9 |      0 | 17,578,293 | Used   |
>>> | FullTape-0006 |     10 |      0 | 15,953,200 | Used   |
>>> | FullTape-0005 |     11 |      0 | 20,655,434 | Used   |
>>> | FullTape-0003 |     11 |      0 | 20,101,553 | Used   |
>>> | FullTape-0002 |     11 |      0 | 19,915,631 | Used
...
>   Hi Arno.
> 
>   I was checking my drive and tapes this days. updating his Firmware, etc.
> 
>   I have been having some problems with my drive, but looks like is back.

Good to know.

>   Well analyzing your info, the last part about:
> 
>> The errors and mounts columns are rather simple to modify, I think. If
>> you want to get useful thresholds for the no. of writes, you should
>> take your average (or maximum) effective volume capacity, divide thet
>> by the block size you use (probably about 64 k) and multiply with the
>> 260 full backups HP claim the tapes can stand. The result would be
>> your maximum number of writes per tape - or somewhat close to it.
> 
> Right now, my tape has disable the HW compression, them i just get 100GB.
> 
> To get this data i need to calculate:
> 
> maximum Numbers of Writes per tape = (100,000kb * 64kb)/260 = 24615.385
> 
>   I'm right?

Hmm... I may be wrong (after the holiday season :-) but I think you 
should do

100000 / 63.5 * 260 =~ 409449

> If this result is correct, i already need to change some volumes soon?

If you are right - yes. If I am right - no ;-)

> I'm right Arno? Thanks for your time!!!

I created this query, so I should try to help making it useful, right? :-)

Arno

> Happy New Year to all!!!

Thank you!


-- 
Arno Lehmann
IT-Service Lehmann
www.its-lehmann.de

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