Date: Sun, 24 Sep 2006 23:33:13 +0200 From: "O. Hartmann" <ohartman@mail.uni-mainz.de> To: ajmm@portugalmail.pt Cc: ohartman@uni-mainz.de, freebsd-questions@freebsd.org Subject: Re: Hitachi disk performance Message-ID: <4516F999.2080309@mail.uni-mainz.de> In-Reply-To: <1159126289.4516dd118b4f6@webmail3.portugalmail.pt> References: <1159126289.4516dd118b4f6@webmail3.portugalmail.pt>
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ajmm@portugalmail.pt wrote: > > > Hi! > > I saw your posts with title "Performance issue amd64". I don't know if this > could help, but I'm having the same problem with ICH5 SATA controller and the > same Hitachi drives on linux. I cannot activate DMA, and bandwidth is lesser > than 10MB/s. I could not solve the problem, until now. BTW, with "any" other > drives, the problem does not exist. > > Antonio Marques > __________________________________________________________ > Continua a preferir gastar mais? > Compare o preço da sua ligação à Internet > http://acesso.portugalmail.pt/compare > I did not dig deeper into that problem - due to the lack of suitable hardware. Bonnie shows about 55 MB/s sustained performance, sometimes higher, burst reaches 117 MB/s. With the old disks, both values were about 25 MB/s higher. I doubt this is only a partition layout related issue. The average performance droped remarkable, especially while compiling world. At the Hitachi website I did not find any hint about issues with several controllers or especially with SATA PseudoRAID like nForce4 offers, hope this can be fixed anyway and it's a simple firmware issue. Checking the disks via the Hitachi brewn drive fitness tool gives no suspicious data, mode is SATA II/300, no accoustic or energy management and so on ... I would appreciate any solvage, if you have one! Well, in your case, I would check whether your drive is in SATA 150 mode (factory setting) or SATA 300, as I know the ICH5 is only SATA 150 and drives with problems switching to SATA 150 while in SATA 300 could cause problems. Regards, Oliver
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