From owner-freebsd-scsi@FreeBSD.ORG  Wed Apr 20 20:50:31 2005
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Date: Thu, 21 Apr 2005 02:18:43 +0530
From: "Rajesh S. Ghanekar" <rajesh_ghanekar@persistent.co.in>
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cc: freebsd-scsi@freebsd.org
Subject: Re: QLogic Fiber Channel with isp.c
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Rajesh S. Ghanekar wrote:

> Hi,
>
>    We had a problem when a disk shelf failed. The error message is as
> follows:
>
> Mar 23 15:33:09 freebsd /kernel: isp0: bad underrun for 0.0 (count > 
> 65536,
> resid 2147422207, status not marked)
>
> I would like to know the reasons of what causes Data Underruns in FC 
> Adapters?
> Any pointers?

Sorry for providing insufficient data.

OS Version: FreeBSD-4.10
FC HBA: QLogic ISP 2300


Thanks,
Rajesh