From: Siim Vahtre <siim@xf.ee>
To: Suman Tripathi <stripathi@apm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux SCSI List <linux-scsi@vger.kernel.org>
Subject: Re: sequential I/O on SSD disk varies from 20 to 300 MBytes/s every week
Date: Mon, 2 Feb 2015 16:08:53 +0200 (EET) [thread overview]
Message-ID: <alpine.DEB.2.00.1502021600380.23745@q.xf.ee> (raw)
In-Reply-To: <CAOHikRBjOuUMdeyKDx0=+6YPKNrhZNquukAfdv-qMxYGFdX34Q@mail.gmail.com>
> Please check whether write cache is enabled in the drive
> also check whether NCQ is enabled or not.
About caches please note quote from my e-mail below. Changing NCQ
enabled/disabled had no effect either.
>> 6) It is not a caching issue (controller/disk caches were off during
>> testing, but even putting them on had minor impact on the results)
next prev parent reply other threads:[~2015-02-02 14:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 13:07 Siim Vahtre
2015-02-02 13:49 ` Suman Tripathi
2015-02-02 14:08 ` Siim Vahtre [this message]
[not found] ` <CAN7X1UkducENcF_+GuY7rY3q+qAhAp9H1HWMAXnFFtfTjX7Zrw@mail.gmail.com>
2015-02-04 9:50 ` Siim Vahtre
2015-02-25 21:50 ` Pavel Machek
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