Dear Managers,
we've recently switched our main backup machine from VMS to Unix
(V4.0B). Our backup medium is a Quantum DLT4500 with a media changer
unit. Both devices have been entered into the /etc/ddr.dbase (see
below). Due to financial reasons (my employer being an university, after
all...) I'm forced to do the backups with tar. The current strategy is to
tar each filesystem individually onto the DLT, with each filesystem
having a size of about 10GB (although we've also a 65GB RAID, but that's
another story...). My problem is that the DLT does not appear to switch to
the next tape when the EOM is reached.
Therefore:
1. How do I configure the DLT/Changer such that it switches automatically
between the tapes in a tapeset?
and/or
2. I could switch manually between tapes, but how do I do that
softwarewise so that I can run my backups overnite?
Thanks for your help,
Joern Wilms
wilms_at_astro.uni-tuebingen.de
---------
Here's the ddr.dbase entry:
SCSIDEVICE
#
# DLT 4500 with attached loader, 1998/04/02 JW
#
Type = tape
Name = "DLT" "4500"
#
PARAMETERS:
TypeSubClass = DLT, loader
DENSITY:
# low (rmt0l): high density, compression off, CompacTape IV
DensityNumber = 0
DensityCode = 81630_bpi
CompressionCode = 0x0
Buffered = 0x1
DENSITY:
# high (rmt0h): high density, compression on, CompacTape IV
DensityNumber = 1
DensityCode = 81630_bpi
CompressionCode = 0x1
Buffered = 0x1
DENSITY:
# medium (rmt0m): medium density, no compression, CompacTape III
DensityNumber = 2,4,5,6,7
DensityCode = 42500_bpi
CompressionCode = 0x0
Buffered = 0x1
DENSITY:
# alternate (rmt0a): medium density, compression, CompacTape III
DensityNumber = 3
DensityCode = 42500_bpi
CompressionCode = 0x1
Buffered = 0x1
Received on Mon May 11 1998 - 09:43:41 NZST