Re: RAID10 not working in install

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Subject: Re: RAID10 not working in install
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 24 Feb 2008 17:03:23 +0000
Cc: davidsen@xxxxxxx
In-reply-to: <47C199AE.5010205@xxxxxxx>
Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903
Reply-to: For users of Fedora <fedora-list@xxxxxxxxxx>

> The raw read speed on a RAID1 array is the speed of a single drive. The 

No. A smart raid1 driver will use both source disks. The raw write speed
is that of the slowest drive (plus overhead).

RAID 10 gives you better write throughput which on a modern PC normally
means that with PCI Express your bridge/memory bandwidth becomes the
limit.

Alan

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