Seems like any tuning you did for one I/O workload would be sub-optimal for
the other.

Are large transfer sizes still de riguer for LTO?

[RC]




                "John E.
                Vincent"
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                <ADSM-L AT VM DOT MAR         Re: Number of HBA's
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                02/09/2005
                03:59 AM


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Stef Coene wrote:
> On Tuesday 08 February 2005 21:10, Ben Bullock wrote:
>
>> The documents say you are supposed to NOT have SAN and tape
>>devices running on the same HBAs.
>
> Mhh, can you point me to a paper stating this?  I can't find any.
> I can find the rule that a tape drive must be on a separate zone from the
> disks.  But it can still be the same HBA in the host.
>
> Stef

Well what it really boils down to is the following two things:

1) Do you really want to slow disk access for tape traffic
and
2) Is it a supported configuration. I've been told flat out by IBM that
it is NOT a supported configuration. So as much as I would like to give
my TSM server some space on the SAN, I don't have room for another HBA
(x335) and I'm not about to go unsupported for it.

John




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