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тАО08-06-2009 02:23 AM
тАО08-06-2009 02:23 AM
Getting both Tape drives working at the same time?
We have just added a second LTO4 Tape drive but we cannot get both Drives to work at the same time. Both drives work individually but they just won't run at the same time.
Server - DL360 G5
Version Netbackup 6.5.3
Tape Library - MSL2024 with two LTO4 Tape drives
Is there a setting I need to change that I'm unaware of?
Thanks
Ryan
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тАО08-06-2009 02:08 PM
тАО08-06-2009 02:08 PM
Re: Getting both Tape drives working at the same time?
It should be easy to get both drives active at once by creating two backup jobs -- One for C:\, one for D:\, for instance, and specifying which drive each job uses.
Liberty breeds responsibility; Government breeds dependence
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тАО08-07-2009 12:24 AM
тАО08-07-2009 12:24 AM
Re: Getting both Tape drives working at the same time?
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тАО08-07-2009 11:25 AM
тАО08-07-2009 11:25 AM
Re: Getting both Tape drives working at the same time?
It the target tape storage unit setting for maximum concurrent write drives highet than 1?
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тАО08-10-2009 06:45 AM
тАО08-10-2009 06:45 AM
Re: Getting both Tape drives working at the same time?
It is set to 2 concurrent drive which is why it's quite confusing.
They just seem to take it in turns rather than write at the same time
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тАО08-10-2009 06:49 AM
тАО08-10-2009 06:49 AM
Re: Getting both Tape drives working at the same time?
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тАО08-10-2009 07:04 AM
тАО08-10-2009 07:04 AM
Re: Getting both Tape drives working at the same time?
Cheers
Ryan
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тАО08-11-2009 06:29 PM
тАО08-11-2009 06:29 PM
Re: Getting both Tape drives working at the same time?
Have you done any testing to see how fast the data can be read from disk? If it's less than 40MB/sec (more if your data is highly compressible), then you're starving the tape drive anyway, and should consider a way to make sure each drive is fed at least (compression ratio * 30MB/sec).
Liberty breeds responsibility; Government breeds dependence