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тАО07-16-2009 10:23 AM
тАО07-16-2009 10:23 AM
The tape drive is the only device on a SCSI interface.
I've decided that I need to have two drives, one as a spare. I'd like to be able to switch drives regularly, just as a confidence test that both drives still work.
So I got another C6375A DLT. I mounted it the rack next to the other. Gave the new one it's own SCSI address.
Now, I'm sure it's a bad idea to put both drives on the same chain, for performance reasons. It's not my intention to use both drives at the same time.
But other than that, can they live together on the same chain, as a convenience for me?
I'm thinking that I could just power on the drive I want to use that week, and leave the other powered off.
Just want to see if this is a bad idea.
As an alternative I could give both devices the same address and physically swap them each week, but I'm trying to avoid that.
Thoughts pls.
Solved! Go to Solution.
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тАО07-16-2009 10:33 AM
тАО07-16-2009 10:33 AM
SolutionSo go ahead and do it.
UNIX because I majored in cryptology...
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тАО07-16-2009 10:46 AM
тАО07-16-2009 10:46 AM
Re: Two tape drives, one SCSI interface
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тАО07-16-2009 10:47 AM
тАО07-16-2009 10:47 AM
Re: Two tape drives, one SCSI interface
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тАО07-16-2009 10:50 AM
тАО07-16-2009 10:50 AM
Re: Two tape drives, one SCSI interface
if you're talking for installation, its probably better to shutdown the system.
after installation, I'd leave the drives "up" all the time.
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тАО07-16-2009 10:56 AM
тАО07-16-2009 10:56 AM
Re: Two tape drives, one SCSI interface
UNIX because I majored in cryptology...
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тАО07-16-2009 11:27 AM
тАО07-16-2009 11:27 AM
Re: Two tape drives, one SCSI interface
HP recommends one tape drive per scsi card.
If you use both drives at the same time, performance may significantly degrade.
Source: HP Response Center, 2002 response center call I was on.
Yes. I remember.
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тАО07-16-2009 11:28 AM
тАО07-16-2009 11:28 AM
Re: Two tape drives, one SCSI interface
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тАО07-16-2009 01:57 PM
тАО07-16-2009 01:57 PM
Re: Two tape drives, one SCSI interface
I'd avoid changing the power state of any
device on the bus while any other device on
the bus is busy. I normally cycle the power
daily on a DLT4000 on my Alpha (VMS) system
with no ill effects.
> sure it will work, as long as [...]
And the cable's not too long.