From: Jeff Garzik <jgarzik@pobox.com>
To: "Ralph Paßgang" <ralph@debianbase.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: Which raid card to buy for Sarge
Date: Wed, 31 Mar 2004 15:59:26 -0500 [thread overview]
Message-ID: <406B312E.1030006@pobox.com> (raw)
In-Reply-To: <200403312242.49462.ralph@debianbase.de>
Ralph Paßgang wrote:
> kernel code). But normaly a real hardware raid is without a doubt faster than
> a software raid.
Well... Regardless of hardware or software RAID, the kernel I/O limits
and the drive I/O limits are the main limiting factor. Hardware RAID
mainly helps for RAID1 and RAID5 writes, eliminating duplicate copies of
data going across the PCI bus... at the expense of relinquishing control
over your data to the hardware RAID's firmware.
A UDMA/133 PATA hardware RAID from a large company I won't mention is
quite a bit slower than any SATA software RAID that I've tested...
Jeff
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next prev parent reply other threads:[~2004-03-31 20:59 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-31 15:47 Which raid card to buy for Sarge me
2004-03-31 16:15 ` Luca Berra
2004-03-31 16:43 ` me
2004-03-31 16:58 ` Måns Rullgård
2004-03-31 18:03 ` Ralph Paßgang
2004-03-31 19:50 ` Mark Hahn
2004-03-31 20:19 ` Richard Scobie
2004-04-01 9:07 ` KELEMEN Peter
2004-04-04 4:47 ` Richard Scobie
2004-04-09 11:16 ` KELEMEN Peter
2004-04-09 13:07 ` Which raid card to buy for SargeD Yu Chen
2004-04-09 21:52 ` KELEMEN Peter
2004-03-31 20:42 ` Which raid card to buy for Sarge Ralph Paßgang
2004-03-31 20:59 ` Jeff Garzik [this message]
2004-03-31 21:39 ` Guy
2004-04-01 4:49 ` Brad Campbell
2004-04-01 4:51 ` seth vidal
2004-04-01 5:01 ` Brad Campbell
2004-04-01 5:39 ` Guy
2004-04-01 5:51 ` Brad Campbell
2004-04-01 5:29 ` Guy
2004-04-01 5:54 ` Jeff Garzik
2004-04-01 5:44 ` Jeff Garzik
2004-04-01 5:56 ` Brad Campbell
2004-04-01 7:49 ` Sandro Dentella
2004-04-01 8:03 ` Brad Campbell
2004-04-01 8:07 ` Jeff Garzik
2004-04-16 14:25 ` Nick Maynard
2004-04-16 15:09 ` Måns Rullgård
2004-04-16 16:29 ` Nick Maynard
2004-04-16 17:44 ` Måns Rullgård
2004-04-16 22:34 ` jlewis
2004-04-01 4:24 ` me
2004-04-01 4:57 ` Clemens Schwaighofer
2004-04-01 5:34 ` Jeff Garzik
2004-04-01 6:39 ` Clemens Schwaighofer
2004-04-01 5:58 ` Jeff Garzik
2004-04-01 12:52 ` me
2004-04-01 19:31 ` Terrence Martin
2004-04-02 4:46 ` me
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