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Date:      Tue, 5 Jun 2018 19:28:54 +0200
From:      Dirk-Willem van Gulik <dirkx@webweaving.org>
To:        "Kenneth D. Merry" <ken@FreeBSD.ORG>
Cc:        freebsd-scsi@freebsd.org
Subject:   Re: Scalar i40 tapechanger LUN appearing as a second tape drive
Message-ID:  <D2BDA422-CBFF-4E1C-8ECE-2740652746EF@webweaving.org>
In-Reply-To: <64CB99E1-9A12-41EB-9D11-42C1AECED2F0@webweaving.org>
References:  <47CCCC93-7168-47B8-8C80-248C90F8085C@webweaving.org> <20180515201939.GA35140@mithlond.kdm.org> <3E5345E0-2F97-47A8-8BFB-94523B65B0A4@webweaving.org> <20180516165307.GB35140@mithlond.kdm.org> <64CB99E1-9A12-41EB-9D11-42C1AECED2F0@webweaving.org>

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> On 16 May 2018, at 19:30, Dirk-Willem van Gulik <dirkx@webweaving.org> wrote:
> 
> On 16 May 2018, at 18:53, Kenneth D. Merry <ken@FreeBSD.ORG> wrote:
> 
>>> Ok. good advice. Will do exactly that.
>> 
>> The best controllers to use are LSI (now Broadcom) 6Gb or 12Gb SAS
>> controllers.  They have TLR support, which helps insure data integrity with
>> tape drives.
> 
> Ok - we surely have a few  SAS9201 and LSIA SAS9202’s around.

Ok - So the summary is that 1) indeed the LSI controller see the Scalar i40 changer with no issue (and gives us a nice speed update). And that 2) that there may be some regression in the cam/scsi stack -- restoring a FreeBSD-8-RELEASE makes the P222 see the changer again.

Next up - finding out what is wrong with LEOM (and amanda).

Dw.



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