Re: Interesting LTO fault's symptom

We had our DLT drives swapped out for LTO1 drives last November and set up
the cleaning in the library (STKL180) as per usual, the drives would never
ask for a clean.
By January we where getting massive amounts of tape errors on a daily basis,
after weeks of IBM/STK trying to work out why, for the hell of it I cleaned
the drives manually and instantly 95% of the errors went away.
Since then I've now set up some timed scripts in TSM to clean the drives on
a weekly basis. We are still getting some error's like this :-

15/04/2003 09:30:10 ANR9999D pvrntp.c(6207): ThreadId<26> BLOCK LOCATE
ERROR, VOL=001010, DRIVE=TAPE0 (mt20.1.2.3): Expected BlockID 2145678;
actual locate 0.

And are hopeing a firmware upgrade will possibly help this.

-----Original Message-----
From: Karel Bos [mailto:Karel.Bos AT NUON DOT COM]
Sent: 25 June 2003 08:12
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Interesting LTO fault's symptom


Hi,

Just to join. Today one of the tapes got a write error. In the AIX error
report we found this:

Description
TAPE OPERATION ERROR

Probable Causes
TAPE

User Causes
MEDIA DEFECTIVE
DIRTY READ/WRITE HEAD

To be sure I got the drive details:

Drive Usage Statistics

Loads 5719
Unloads 5719
MB written 139338803
MB read 1437640
Cleanings 251
Power on hours 8590

Interesting part is the number of cleanings. Our cleaning tape has been used
19 times in the past 3 years. This drive is a replacement drive put in our
library by IBM to replace a drive with a tape stuck in it.

Regard,

Karel

This TSM server: 4.2.2.13
OS: AIX 5
Library: 3584 with 10 LTO1 scsi drives





> -----Oorspronkelijk bericht-----
> Van: Leonard Lauria [mailto:Leonard AT UKY DOT EDU]
> Verzonden: dinsdag 24 juni 2003 16:39
> Aan: ADSM-L AT VM.MARIST DOT EDU
> Onderwerp: Re: Interesting LTO fault's symptom
>
>
> yes it does...i can dig it up and send it to you if
> you'd like.  :)
>
> -----Original Message-----
> From: Richard Sims <rbs AT BU DOT EDU>
> To: ADSM-L AT VM.MARIST DOT EDU
> Date: Tue, 24 Jun 2003 09:06:50 -0400
> Subject: Re: Interesting LTO fault's symptom
>
> >According to a memo I received from IBM, the LTO
> >drives do NOT require periodic cleaning.
>
> I would imagine, then, that the memo goes on to describe the
> library cleaning tapes as decorative accessories?  ;-)
>
>   Richard Sims, BU
>


****************************************************************************************************
Equitas Limited, 33 St Mary Axe, London EC3A 8LL, UK
NOTICE: This message is intended only for use by the named addressee
and may contain privileged and/or confidential information.  If you are
not the named addressee you should not disseminate, copy or take any
action in reliance on it.  If you have received this message in error
please notify postmaster AT equitas.co DOT uk and delete the message and any
attachments accompanying it immediately.

Equitas reserve the right to monitor and/or record emails, (including the
contents thereof) sent and received via its network for any lawful business
purpose to the extent permitted by applicable law

Registered in England: Registered no. 3173352 Registered address above
****************************************************************************************************