On Wednesday, 12.03.2014 at 12:28 -0400, Jon LaBadie wrote: > A guess only. > > I note the measured speed has dropped by 45%. Due to what I haven't a > clue, but maybe some hardware change or cables or ???
Hmmm, yeah: I noticed that too, just after I'd posted. It's the same controller card as always and the same cables, so it's either a driver issue with the controller (OS has been upgraded once or twice) or a fault with the controller or damage to the cable, maybe. > Perhaps your system's ability to feed the drive has dropped below the > minimum needed to keep the drive streaming. In that case, the drive > must "shoe-shine" and each restart costs a bit of tape. Would this behaviour be noticeable just by looking at the drive in operation, do you think, seeing some kind of stop and start? Backups normally run during 'out of hours', but I can run a job while physically sat in the room with the drive... Dave. -- Dave Ewart da...@ceu.ox.ac.uk Computing Manager, Cancer Epidemiology Unit University of Oxford N 51.7516, W 1.2152
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