I have my library set up to do the cleaning.
When the tape drive says it needs it the library does the cleaning.
Too much cleaning will scrub the drive heads and give you more errors,
or have to replace the drive sooner then expected.
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of WEAVER,
Simon (external)
Sent: Monday, November 03, 2008 1:13 AM
To: smpt; Justin Piszcz; A Darren Dunham
Cc: Veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Poll: How many times do you use a cleaning
tape?
Rarely clean the drives myself (LTO3) - Only if I start to get Media
Related errors or possible write errors on a specific drive.
I always understood that too much "over cleaning" was more harm than
good. 16TB of Data per clean.... well that blows one of my sites out :-)
Thats a days work of Backups in one case ....
Simon
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of smpt
Sent: Saturday, October 25, 2008 5:12 PM
To: 'Justin Piszcz'; 'A Darren Dunham'
Cc: Veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Poll: How many times do you use a cleaning
tape?
IBM LTO3 and LTO4 requires cleaning every 16 TB of data.
stefanos
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Justin
Piszcz
Sent: Tuesday, October 14, 2008 1:10 AM
To: A Darren Dunham
Cc: Veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Poll: How many times do you use a cleaning
tape?
On Mon, 13 Oct 2008, A Darren Dunham wrote:
> On Mon, Oct 13, 2008 at 04:54:22PM -0400, Justin Piszcz wrote:
>> Also I've read / heard its best to let LTO-3 LTO-4 drives set the
>> tape alert flag when they need cleaning vs. cleaning drives at
>> intervals (which is recommended for sure with LTO-2) -- what have you
observed?
>
> I'm not sure which you're saying is recommended for LTO-2. As far as
> I'm aware, periodic cleaning is not recommended for any model of LTO
> drive. This is documented for HP and IBM drives:
>
> HP
> Should I do regular cleaning like DDS?
>
> The HP Ultrium drive is designed to require very minimal
> cleaning. The internal head cleaner provides an effective
> preventative cleaning against head contamination. Regular cleaning
> using cleaning cartridge is not necessary. Do not use a cleaning
> cartridge unless the drive requests it and the Use Cleaning
> Cartridge
>
> IBM
> The IBM Ultrium LTO Tape Drive was intentionally designed to be
> self-monitoring and self-cleaning. Therefore, the IBM
recommendation
> is not to manually clean the tape drive, but rather to use the
> automatic cleaning function provided with the library or by your
> application.
>
> Each drive determines when it needs to be cleaned and alerts the
> library or your application.
>
> In order to prevent recontamination of drive surfaces, you are
> limited to using a specific cleaner cartridge a maximum of 50
times.
>
> Note: Do not manually initiate drive cleaning unless requested by
> support engineers. LTO drives are self-cleaning and will require
> infrequent cleaning using cleaning cartridges.
>
> I found the document I was thinking of. HP LTO-1 uses 18.5 meters of
> cleaning tape, other models use 5.5 meters. So you get 15 on an LTO1
> and 50+ on LTO-2 and LTO-3 (and I assume on LTO-4 as well).
>
> I love whoever proofread this sentence. (...up to at least..)
>
> IMPORTANT: A cleaning cartridge can be used up to at least 50 times
> (LTO2 and LTO3) or 15 times (LTO1). The cleaning cartridge is
ejected
> immediately if it has expired or if it is not an approved Ultrium
> cleaning cartridge. Discard it and use a new one.
>
> Technically, because the cleaning usage algorithm isn't mandated,
> there's no way for a universal cleaning *tape* manufacturer to know
> what the usage will be beforehand. A manufacturer could use more or
less.
> However, it appears that both IBM and HP use 50 on recent drives.
>
> --
> Darren
Very nice information/description, thanks!
Justin.
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