Date: Wed, 1 Oct 2008 04:49:27 +0700 From: "Danny Do" <ai_quoc@hotmail.com> To: "'Wojciech Puchar'" <wojtek@wojtek.tensor.gdynia.pl> Cc: freebsd-questions@freebsd.org Subject: RE: Optimal File System config for 2.5TB RAID5 Message-ID: <00ee01c92346$69508fa0$3bf1aee0$@com> In-Reply-To: <20080930205435.B20033@wojtek.tensor.gdynia.pl> References: <1222681181.48e0a25d094c3@www.inbox.lv> <BAY139-DAV13C8982A51CD9B05C74D5090430@phx.gbl> <48E21C66.8080407@FreeBSD.org> <BAY139-DAV5423DFBF403B32AA0C22690430@phx.gbl> <20080930161407.E16761@wojtek.tensor.gdynia.pl> <BAY139-DAV45B9F2CCF6913F5533E3090430@phx.gbl> <20080930205435.B20033@wojtek.tensor.gdynia.pl>
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Hi Wojciech Puchar, I got Perc 4E-DI Embedded Raid Adapter (256MB) from DELL for my current SCSI system. They said it's the enterprise class. I don't know much about the performance between software RAID and hardware RAID. Could you please tell me if this type of hardware RAID controller could match the software RAID you were talking about? I don't want to pay for it if I don't really need it. Thanks, Danny -----Original Message----- From: Wojciech Puchar [mailto:wojtek@wojtek.tensor.gdynia.pl] Sent: Wednesday, 1 October 2008 1:56 AM To: Danny Do Cc: freebsd-questions@freebsd.org Subject: RE: Optimal File System config for 2.5TB RAID5 > > The reason I want to use hardware RAID is because I got so much problem with > software RAID5 4 years ago on FreeBSD 5.4. I still remember those > nightmares. Furthermore, hardware RAID5 doesn't require much knowledge and > management. > > But you could be right, the CPU speed is triple now, software RAID gets > smarter and more stable, it could perform better than hardware RAID because > it's more flexible. But again, I still prefer hardware because it's easy to it's someone more than that, still - you don't read my mails carefully. you will get better performance with my patch, but still it will be crappy with your "hardware" RAIDs compared to what it should be
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