linux-kernel - Re: sequential I/O on SSD disk varies from 20 to 300 MBytes/s every week

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]

Date:	Mon, 2 Feb 2015 16:08:53 +0200 (EET)
From:	Siim Vahtre <siim@...ee>
To:	Suman Tripathi <stripathi@....com>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux SCSI List <linux-scsi@...r.kernel.org>
Subject: Re: sequential I/O on SSD disk varies from 20 to 300 MBytes/s every
 week

> 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)
--
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/