I have found this issue constantly...
We also used to use maxell media throughout our operations although they
were only SDLT 220.
We found the same problems but a partial fix seemed to arise that when the
tapes were brand new and not been used previously the drives would need to
be cleaned after the labelling operation.
This was put down to the fact that similar to DLT8000 drives with DLTIV
media, that when the initial write for the label took place the film from
the head fell into the drive causing an issue with drive, although not
enough for the device to flag up a cleaning request.
Failure to do this would cause an issue whereby legato would get so far into
a tape write say 30mb - 5GB and then suddenly encounter an error and mark
the tape up as full and then load another one..... to put this in picture we
managed to get through 45 SDLT 220 tapes to backup 250GB! and it was still
asking for more tapes.
Hope this helps...
----- Original Message -----
From: "Ken Gehring" <kgehring AT MYREALBOX DOT COM>
To: <NETWORKER AT LISTMAIL.TEMPLE DOT EDU>
Sent: Wednesday, October 29, 2003 1:52 AM
Subject: Re: [Networker] SDLT tape reliability.
> We've found the same problem, but we think that the problem is mainly
> with the
> media (Maxell) rather than the drives. Out of 200 Maxell tapes we have had
a
> failure rate of 30% so far (thats 60 tapes) and it just keeps growing.
With
> our
> Quantum tapes we have see a failure rate for tapes in the 2 to 3% range
but
> are still doing a bit of investigation on these tapes.
> It also seems that Maxell is unwilling to honor their warranty. They've
> had
> 5 "bad" tapes for testing for 10 weeks now with no answer back from them.
> The testing was to take 2 weeks. They won't even answer emails. I hate to
> slam
> vendors, but I would stay away from Maxell.
>
> Ken Gehring
>
>
> ----- Original Message -----
> From: "Steven Frost" <Steven.Frost AT POWERCO.CO DOT NZ>
> To: <NETWORKER AT LISTMAIL.TEMPLE DOT EDU>
> Sent: Tuesday, October 28, 2003 4:10 PM
> Subject: [Networker] SDLT tape reliability.
>
>
> Hi there. I am finding that the attrition rate on our Super DLT tapes
seems
> rather high.
> For tape that is purported to last 1,000,000 passes , we should not have
ANY
> media problems.
> For example , a volume previously had 250GB+ written during the normal
> savegroup process and was marked as full
> without errors. On it's next cycle a media I/O error happens after, say,
> 25GB, and Legato uses another
> volume from the jukebox inventory. The tape with the media error is now
> useless ( after 25GB anyway).
> Is this normal?
> Our volumes at most would only have 20 saves done over the last 18 months,
> as we have had our SDLT drives since April 2002, and the tapes are re-used
> monthly. Out of 140 cartridges, nearly 22 are now dodgy. Is there a way to
> rejuvenate these?
> We have had dual Compaq/HP SDLT 160/320 drives in a Compaq MSL5026 Jukebox
> since November, beforehand they were 110/220 drives. We have replaced one
of
> these drives twice now , as there were too many tape problems. If a
> tapedrive is 'shoeshining', would that affect the tape media?
> Any comments or similar experiences ? Thanks .
>
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