Thanks both James and Tim
Further testing suggests it's the alignment of the record head on the SAS
drive that's the issue as the SCSI drive can read and write its own stuff as
well as reading stuff written on a 3rd drive - but not tapes written on the
SAS drive. The SAS drive can read anything including its own tapes - but
remains the only drive that can read its own tapes.
Annoying as a) I've written 13 tapes already with the SAS drive and b) the
SCSI drive is very much slower. Looks like I'll need to buy a replacement
SAS drive. Ah well.
Cheers
R
-----Original Message-----
From: Hampshire <hampshire-bounces@???> On Behalf Of James
Dutton via Hampshire
Sent: 04 October 2024 19:21
To: Hampshire LUG Discussion List <hampshire@???>
Cc: James Dutton <james.dutton@???>
Subject: Re: [Hampshire] Tape drives - one can't read from t'other!
On Fri, 4 Oct 2024 at 17:01, Tim via Hampshire
<hampshire@???> wrote:
>
> One of the common issue I had back when doing tape backup was head
alignment, it only had to be a fraction out and then you had the situation
you have now. I know some drive did have a slight bit of alignment option
but not knowing it it up or down left or right it would be a bit of trial
and error (even slackening the securing screws and retightening the screw
might be enough. The other point to check is how clean is the head, it might
need a clean.
>
I would suspect the tape head alignment also.
Back in the day, we just got the tape backup devices serviced / calibrated /
aligned at regular intervals. I don't know what the service engineer did but
it kept them working well.
It was a good choice you made, to get two devices, otherwise you would never
have found out that you had a problem.
Keep in mind that tape media deteriorates over time, so make new duplicates
over time.
Kind Regards
James
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