DLT Tape Read errors on aac0

[Scott Long]

The ServeRAID/ips driver in FreeBSD cannot talk directly to the
SCSI bus on the RAID card, nor does the card export non-RAID
devices to the driver, nor do I know if there is a way to make
this work.

Seriously, using a $200-$1000 RAID card to run your tape drive
in place of a $40 SCSI card really doesn't make a whole lot of
sense in most cases.  I understand that there are situations
where there aren't enough PCI slots for an extra SCSI card, but
it's a tradeoff.  Most firmware simply isn't written to multiplex
direct SCSI requests from the OS with it's own SCSi stack.  Trying
to do so only jeopardizes the integrity of the system.

Scott

Maxim M. Kazachek wrote:

> IBM ServeRAID 6i in IBM xSeries 345 doesn't see tape drive on second LSI 
> Logic MPT channel (6i is a Zero channel RAID Controller). There was 
> trouble with setting DDS-4 streamer under SCO. Due to lack of 
> information provided by SCO OperServer 5.0.5 FreeBSD (5.3 or so) was 
> tried to see, which devices are detected. After installation of Adaptec 
> 19160 streamer was seen by FreeBSD, then was configured under SCO. As 
> far as I know it works perfectly now.
> 
>    Sincerely, Maxim M. Kazachek
>        mailto:stranger at sberbank.sibnet.ru
> 
> 
> On Mon, 19 Dec 2005, Scott Long wrote:
> 
>> Christian Gr?ndemann wrote:
>>
>>>>
>>> Thanks for your fast answer, Scott! What Adaptec Card can you recommend?
>>> I am thinking about this card, it seems to be supported quite well.
>>> * Adaptec 19160B
>>>
>>> Is this card a "real" SCSI card ? Actually I thought the 2120S is a 
>>> "real"
>>> SCSI Card.
>>> And for the future, what kind of Adaptec RAID-5 card is useable where
>>> I can put several devices on it like a Raid-5 *and* a DLT device ?
>>>
>>> Christian
>>>
>>
>> An Adaptec 19160 would be an excellent choice.  By 'real SCSI card' I 
>> mean one that only does SCSI and doesn't have a RAID processor sitting
>> in front on it.  I don't have a good answer for your last question.
>> Scott
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>