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Date: Wed, 20 May 2015 20:50:33 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: George Kontostanos <gkontos.mail@gmail.com>
Cc: freebsd-stable <freebsd-stable@freebsd.org>,
 "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org>
Subject: Re: L2ARC degraded. Checksum errors, I/O errors
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On Wed, May 20, 2015 at 07:17:44PM +0300, George Kontostanos wrote:

> Hello,
> 
> Appologies if that has been asked before. I was wondering if the following
> bug has been addressed so far:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198242

As I know

kstat.zfs.misc.arcstats.l2_cksum_bad: 14495
kstat.zfs.misc.arcstats.l2_io_error: 12877

caused by hardware failure on L2ARC device.
try replace it.