linux-kernel - Re: 3.12: raid-1 mismatch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <528178B8.4000704@fnarfbargle.com>
Date:	Tue, 12 Nov 2013 08:39:20 +0800
From:	Brad Campbell <lists2009@...rfbargle.com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>,
	open list <linux-kernel@...r.kernel.org>,
	linux-raid@...r.kernel.org
Subject: Re: 3.12: raid-1 mismatch_cnt question

On 11/07/2013 06:54 PM, Justin Piszcz wrote:
> On Mon, Nov 4, 2013 at 5:25 AM, Justin Piszcz <jpiszcz@...idpixels.com> wrote:
>> Hi,
>>
>> I run two SSDs in a RAID-1 configuration and I have a swap partition on a
>> third SSD.  Over time, the mismatch_cnt between the two devices grows higher
>> and higher.
>>

Are both SSD's identical? Do you have discard enabled on the filesystem?

The reason I ask is I have a RAID10 comprised of 3 Intel and 3 Samsung 
SSD's. The Intel return 0 after TRIM while the Samsung don't, so I 
_always_ have a massive mismatch_cnt after I run fstrim. I never use a 
repair operation as it's just going to re-write the already trimmed sectors.

Just a thought.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/