<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8">
<META NAME="GENERATOR" CONTENT="GtkHTML/3.18.3">
</HEAD>
<BODY>
On Wed, 2009-09-09 at 10:50 -0600, Gary Sandine wrote:
<BLOCKQUOTE TYPE=CITE>
<PRE>
Hi Andres,
On Wed, Sep 09, 2009 at 04:13:51PM +0000, Andres Paglayan wrote:
> quick question,
>
> If you have 4 x 1 TB disks, and they will be used for general purpose, (ie
> db and file storage)
>
> how would you arrange them?
>
> raid 5 with one hot-spare?
> or raid 1+0 (raid 10) stripping and mirroring?
>
> Both will provide 2 TB of available space,
> will the raid 10 be faster I/O?
I would probably make a RAID 6 array because I think that should
always survive a double disk failure. RAID 5 with a hot spare could
fail if a second disk fails while the hot spare is being included
(the rebuild can take a while for a 2 TB array), and RAID 10 could
fail if one of the mirrors loses its second disk before a RAID 1
component finishes mirroring onto a new disk.
I have only done RAID 6 with hardware RAID cards though (by Areca
and 3ware). I think the Linux kernel software RAID driver supports
RAID 6 now.
</PRE>
</BLOCKQUOTE>
seems it does,<BR>
but I wonder about the write speed in this case,<BR>
it seems the same as raid 5,<BR>
but love the two disk failure and still up feature,<BR>
<BR>
<BR>
<BLOCKQUOTE TYPE=CITE>
<PRE>
Regards,
Gary
_______________________________________________
nmglug mailing list
<A HREF="mailto:nmglug@nmglug.org">nmglug@nmglug.org</A>
<A HREF="https://nmglug.org/mailman/listinfo/nmglug">https://nmglug.org/mailman/listinfo/nmglug</A>
</PRE>
</BLOCKQUOTE>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%">
<TR>
<TD>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%">
<TR>
<TD>
-------------------------------<BR>
Andres Paglayan<BR>
<TABLE>
<TR>
<TD>
o:
</TD>
<TD>
(505) 629-4344
</TD>
</TR>
<TR>
<TD>
m:
</TD>
<TD>
(505) 690-2871
</TD>
</TR>
<TR>
<TD>
f:
</TD>
<TD>
(505) 629-1008
</TD>
</TR>
<TR>
<TD>
h:
</TD>
<TD>
(505) 986-1561
</TD>
</TR>
</TABLE>
andres@paglayan.com<BR>
--------------------------------
</TD>
</TR>
<TR>
<TD>
<BR>
<BR>
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
</BODY>
</HTML>