From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Turmel Subject: Re: Linux software RAID assistance Date: Sat, 19 Feb 2011 10:30:16 -0500 Message-ID: <4D5FE208.5020700@turmel.org> References: <4D540F6C.6050904@gmail.com> <20110215155315.55d35b8e@notabene.brown> <4D5A92F3.1090004@turmel.org> <4D5BD678.2050200@gmail.com> <4D5BE119.7000804@turmel.org> <4D5C0E17.3060306@gmail.com> <4D5C140F.9010301@turmel.org> <4D5C1508.3040308@gmail.com> <4D5C15D3.1070608@turmel.org> <4D5C167C.7000101@turmel.org> <4D5C1CF8.1020507@gmail.com> <4D5C1E0B.9060300@turmel.org> <4D5C2061.4060106@gmail.com> <4D5C2143.3000907@turmel.org> <4D5C2260.3020800@gmail.com> <4D5C273E.7020609@turmel.org> <4D5C4176.80604@gmail.com> <4D5C4204.5020106@turmel.org> <1377706586882297883@unknownmsgid> <4D5C6016.6060809@turmel.org> <4D5D2723.1010101@turmel.org> <6037962689649361915@unknownmsgid> <4D5D52AE.8070602@turmel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Simon Mcnair Cc: NeilBrown , "linux-raid@vger.kernel.org" List-Id: linux-raid.ids On 02/19/2011 03:43 AM, Simon Mcnair wrote: > Phil, > Sorry for the spamming, but I'm just keeping you informed :-). > > proxmox:/home/simon# ./block2gz.sh sdd /media/ntfs3g/sdb > 953869+1 records in > 953869+1 records out > 1000204886016 bytes (1.0 TB) copied, 95384 s, 10.5 MB/s [trim /] > Have just started sdj,sdk,sdl,sdm. I was thinking of renaming the > .gz's with the serial number as this would seem to me as more useful, > is this a good idea ? Yes. I guess they'll finish some time tomorrow? > These numbers are not at all reflective of the drive or controller > speed as I took the lazy route and was writing 2 sets of images at the > same time to the same drive and in addition gzip was also running > (although not really stressing the system from what I could tell). The CPU was busy, but not overloaded. The per-drive data rates were 1/5th to 1/10th what I would have expected. The Asus P6T SE motherboard has a lot of bandwidth. Something's odd. Can you attach a copy of your dmesg? > I suspect also that the drives may be pretty fragmented as the space > was not allocated at the start of the write, so that may have had some > impact too. Ntfs-3g can push 70+ MB/s onto my heavily fragged Windows laptop partition with only 50% of a Core2 Duo. I doubt that's it. Phil