From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juri Haberland Subject: Re: RAID1: Disks alternating on reads Date: Wed, 24 Sep 2003 12:15:25 +0000 (UTC) Sender: linux-raid-owner@vger.kernel.org Message-ID: References: <014b01c38053$0358ad90$0180a8c0@what> <01ca01c38125$cab15c20$0180a8c0@what> Reply-To: Juri Haberland Return-path: To: linux-raid@vger.kernel.org List-Id: linux-raid.ids "Andrew Herdman" wrote: > From: "Juri Haberland" >> This way one disk can seek for a file while the other one is transfering >> one. A single read won't be faster but concurrent access to the same >> filesystem will be much faster than on a non-RAID filesystem. > > Does this mean that the md driver is filesystem aware? Or is it just > because i'm using EXT3? How does md know how many file accesses i'm doing? No, AFAIK it's not filesystem aware and it shouldn't be. For a better explanation please look at the mail from Scott Bailey. He obviously looked at the code which I didn't... Cheers, Juri -- Juri Haberland