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Date:      Fri, 10 Feb 2012 21:45:58 -0800
From:      "" <>
Subject:   ACK/NAK timeout
Message-ID:  <>

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I have the following config:

1. DG43GT motherboard with 4GB memory
2. br10i SAS adapter
3. 16x Toshiba SAS drives connected to expander backplane.

I am able to create a zfs pool ok without any errors but as soon as I
do a scrub on that pool I get tons of scsi errors.

Here is my dmesg output:

(da3:mpt0:0:12:0): READ(6). CDB: 8 0 b2 f1 6f 0
(da3:mpt0:0:12:0): CAM status: SCSI Status Error
(da3:mpt0:0:12:0): SCSI status: Check Condition
(da3:mpt0:0:12:0): SCSI sense: ABORTED COMMAND asc:4b,3 (ACK/NAK timeout)

I have a similar setup with desktop SATA drives and I see no issues.

I have tried replacing motherboard and SAS adapter but no luck.

I have already tried following in my loader.conf


Any help would be appreciated.


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