Re: Hard Disk Fault Tolerance
- From: Armando Treviño López <armando.trevino@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 6 Feb 2002 19:19:34 -0600
Ok, my server can handle only 4 HD, so what do you think about using 3 HD, 2
of them in RAID1, where I will install the system and ISA, and the other HD
in RAID 0 and exclusively for the cache...
I don't think ISA need fault tolerance for the cache, because even if it
fails it can regenerate quickly isn't it? What ISA need is to access the
cache at top speed and RAID 0 gives that performance.
What do you think about it?
Thanks.
Armando.
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, February 06, 2002 1:06 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Hard Disk Fault Tolerance
http://www.ISAserver.org
Actually, if you're going to rebuild the whole thing from scratch, RAID 0+1
(sometimes called RAID 10) is even better.
You get all the speed of RAID 0 distributed reads and writes and all the
mutual fault-tolerance of RAID 1 without the single-disk failure tolerance
of RAID 5.
..of course, this assumes that you're using a hardware (SCSI) RAID solution.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/authors/harrison/
Read the books!
----- Original Message -----
From: "Armando Treviño López" <armando.trevino@xxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Wednesday, February 06, 2002 10:17
Subject: [isalist] Hard Disk Fault Tolerance
http://www.ISAserver.org
Hi, I had installed ISA in a server configured in Mirrored Volumes Hard
Drives.
I have read in Tom's book that it is better to use RAID 5 Volumes, this
because the access to the cache drive is faster, because it doesn't have to
write in two drives the same information.
Recently I have noted a slower access to Internet in my clients, although I
have incremented the percentage of RAM used for cache.
Do you think that I will get a better performance if I reinstall the hole
server, this time in a RAID 5 volume? or is there another way to solve this
without reinstalling the hole system?
Thanks.
Armando Treviño L.
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