[windows2000] Re: Raid

  • From: "Joe Shonk" <JShonk@xxxxxxxxxxxxxx>
  • To: <windows2000@xxxxxxxxxxxxx>
  • Date: Thu, 23 Jan 2003 08:24:14 -0800

Not necessarily... With RAID 1, you have two drive to read from.  Not =
one.  A 3 Drive RAID five, your effectively reading off of 2 spindles =
for data and one for parity (yes the parity is distributed, but the =
point is 2 of the 3 disk reads are data.) With RAID 5, you need atleast =
4-5 spindles to gain a perfomance increase over RAID 1.  By that time, =
you could do RAID 1+0 instead.    A DC isn't going to require alot of =
disk space. RAID 1 is also cheaper that RAID 5 and has the same fault =
tolerance as RAID 5.

Joe

-----Original Message-----
From: Robert Funderburk [mailto:robfunderburk@xxxxxxxxxxx]
Sent: Thursday, January 23, 2003 8:46 AM
To: windows2000@xxxxxxxxxxxxx
Subject: [windows2000] Re: Raid



I disagree.  In a RAID 1 setup your max throughput is the speed of a =
single
drive.  In RAID 5, it will almost always be higher is you have even 3
drives, because of the striping across all three.  When you account for =
the
overhead of writing the parity info, you still get slightly higher
throughput than a RAID 1 setup.  This performance increases with the =
number
of drives you add to the stripe.

-----Original Message-----
From: windows2000-bounce@xxxxxxxxxxxxx
[mailto:windows2000-bounce@xxxxxxxxxxxxx] On Behalf Of Joe Shonk
Sent: Thursday, January 23, 2003 10:20 AM
To: windows2000@xxxxxxxxxxxxx
Subject: [windows2000] Re: Raid



RAID 1, for fault-tolerance and speed.  Raid 1 will be faster than raid =
=3D 5.

The AD database will not grow large enough that you will need multiple =
=3D
disks and form a raid 5 subset... But if you do, and you get yourself a =
=3D
decent controller you could always convert from Raid 1 to 5 on the fly.

Joe

-----Original Message-----
From: bbeckett2000@xxxxxxxxx [mailto:bbeckett2000@xxxxxxxxx]
Sent: Thursday, January 23, 2003 7:02 AM
To: windows2000@xxxxxxxxxxxxx
Subject: [windows2000] Raid


Building a 2000 DC in a pristine domain. What would most of you =3D =
recommend
on=3D20 the DC for fault tolerance, RAID 1 or RAID 5 and why?
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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