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06-15-2004 09:12 AM
06-15-2004 09:12 AM
I tried to restore DAT tapes to OpenVMS system.
Some tapes were restored successfully But some tape were failed.(I cleaned tape drive and I restored these tapes with no errors few weeks ago.)
Please check below error and let me know.
Thank you.
Henry
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
%BACKUP-E-READERRS, excessive error rate reading MKE300:[000000]*.*;
-SYSTEM-F-DRVERR, fatal drive error
%BACKUP-I-OPERSPEC
%BACKUP-I-OPERASSIST, operator assistance has been requested
Solved! Go to Solution.
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06-15-2004 11:02 AM
06-15-2004 11:02 AM
Solutionlooks like either broken drive or broken tapes.
The best way to check is
- Restore other tapes with the same drive
--> If it works drive should be ok, probably
tapes are broken
- Restore tapes on another drive
--> If it works tapes should be ok, probably
drive is broken.
This does assume the tapes where written on the same drive. Else there is still the possibility that your tapes do not match the drive, e.g. trying to read DDS-4 tapes with a DDS-2 drive.
Greetings, Martin
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06-15-2004 08:16 PM
06-15-2004 08:16 PM
Re: excessive error rate reading(Tape error)
I use DAT since 1995 but I'm not full satisfied; it's usually meet drive error using DAT.
To minimize trouble I hint to all my customers:
1) Clean driver weekly;
2) Change tape cartdridge every six months;
3) Don't use DDS cartdridge different form driver (DDS2 for old driver as TLZ07, DDS3 for more rececent and DDS4 for last drivers).
About your immeatly problem, if you can access to another driver, try restore from it. For my experience, execssive error rate is very difficult to solve :-(
Antonio Vigliotti
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06-16-2004 12:08 AM
06-16-2004 12:08 AM
Re: excessive error rate reading(Tape error)
I remember olddays with the TK50 drives that I used to clean the heads with alcohol swap everyweek... :)
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06-16-2004 12:31 AM
06-16-2004 12:31 AM
Re: excessive error rate reading(Tape error)
As Henry has stated
"Some tapes were restored successfully But some tape were failed"
So, this points to tape problem , as the drive can restore some tapes successfully.
Thanks & regards,
Lokesh Jain
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06-16-2004 12:38 AM
06-16-2004 12:38 AM
Re: excessive error rate reading(Tape error)
Henry, can you post a selection of tape entries from the error log.
Purely Personal Opinion
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06-16-2004 03:16 AM
06-16-2004 03:16 AM
Re: excessive error rate reading(Tape error)
The second thing, put a new tape in and try it.
I can say that 90% of these errors relate to the tape drive
Just trial and error
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06-17-2004 02:43 AM
06-17-2004 02:43 AM
Re: excessive error rate reading(Tape error)
I restored these tapes to another server and restored successfully.
(I think Tape drive is not good so some tapes were restored and some tapes not.)
Thank you.
Henry
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06-18-2004 05:49 PM
06-18-2004 05:49 PM
Re: excessive error rate reading(Tape error)
to work better with DAT tapes, periodically you need to initialize with /ERASE qualifier; in this way full tape cartdrige is written; notice this operation require much time.
Antonio Vigliotti
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06-19-2004 04:17 AM
06-19-2004 04:17 AM
Re: excessive error rate reading(Tape error)
what is the purpose? Retension the tape?
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08-25-2004 03:44 AM
08-25-2004 03:44 AM
Re: excessive error rate reading(Tape error)
On four of our DAT drives at my site, cleaning them before our monthly backups is sufficent.
On a fifth DAT drive, that has a weekly backup of 5 DAT tapes, cleaning it once a month wasn't sufficent. I clean that DAT drive before each weekly backup.
Lawrence