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- From: stevedc@syma.sussex.ac.uk (Stephen Carter)
- Subject: Exabyte Backup Failures
- Message-ID: <1993Jan25.123329.11700@syma.sussex.ac.uk>
- Keywords: exabyte backup failures
- Organization: University of Sussex
- Date: Mon, 25 Jan 1993 12:33:29 GMT
- Lines: 51
-
-
- We are running RSTS 9.7. We have had exabytes since I don't know how
- long, and have been VERY happy with the overall functionality.
-
- Backup strategy is to do incremental backups Mon/Tue/Wed/Thur nights
- (at about 02:00), and FULL backups to exabyte, unattended, at about
- 18:00 on saturday - lasting through to early sunday morning. Two
- backup sets onto one physical tape, both sets verifying. Blocksize
- max, groupsize 50.
-
- In July 1992 we swapped two 512Mb Fuji's for Two 2Gb Seagate ST42400
- Scsi discs hanging off a CMD Scsi controller. The users' data did
- expand (naturally!) but currently stands at (laboriously calculated)
- 2,146,696,704 bytes.
-
- When we backup now, the run fails (after 13 hours) with the following
-
- |
- |
- ?Error reading Backup set
- ?Data error on device
- ?Error reading Backup set
- ?Data error on device
- ?Unexpected error 14 in RSTRMS
- |
-
- On the face of it, with these data volumes it may appear to be a badly
- handled end-of-reel situation, so before folk flame me, I HAVE seen a real
- end-of-reel situation on the exabyte, and that was handled properly
- (Please mount volume 2 of Backup set etc etc)
-
- What is it?
-
- Is it a multi-reel so close to the end of data that it fails, or what.
-
- I've RTFM and can't find why BACKUP becomes RSTRMS anywhere, nor the
- Meaning of error 14, nor why our most recent (sic) RMS Utilities
- manual is for V8.0 and dated 1983!
-
- I guess anyway that the 2.1Gb figure above means a re-cast of the
- simple strategy, but the (untypically) badly handled nature of this
- error worries us, and I'd rather get to the bottom of this than kludge
- a workaround.
-
-
- Stephen Carter, Systems & Operations Manager, Computing Services,
- University of Sussex, Brighton BN1 9QJ, UK
- JANET : S.Carter@uk.ac.sussex.central
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