Re: OT: Homebuilt PC
- From: Rob Wynne <doc@xxxxxxxxxxx>
- Date: Fri, 29 May 2009 15:50:03 GMT
Dan <no@xxxxxxxxxxxxxxxxx> wrote:
Justin Thompson <Justin.Thompson@xxxxxxxxxxxxxxxxxxxxxx> wrote:
On Fri, 29 May 2009 07:54:01 -0600, chocolatemalt <me@xxxxxxxxxxxxxx>
I agree with Justin on the 2nd drive for RAID, but wrong RAID level...
go with RAID 1 for data security. You can always back stuff up
regularly to a USB drive or another computer of course, but you'll still
take an annoying time hit when your drive fails and you have to procure
another one and rebuild. Better to simply get an alert than one of the
mirrors failed and at your convenience you can replace it... no delay on
your next WoW session!
Drives are the #1 hardware failure item by far, so to me it seems silly
to be exposed to it.
But you lose half you disk space.
You are right - and as I said - you double your risk of losing your
data, with either disk failure resulting in total loss with RAID0.
But for me - I have a USB drive for backup.
These home RAID systems are not the best and so you will take a hit on
both read and write speed on RAID1 over a Raid 0
So for me - the (still small) risk of failure of my RAID), the cost
of the extra USB drive and a little discipline on backup stratergy is
still preferable to losing half my space and some performance of a
RAID 1 is not a backup strategy. It protects you from a single drive
failure, but that's all it does.
It won't let you recover a file you accidently deleted, overwrote or
corrupted; it won't let you recover from a broken software or driver
installation, nor can it be used to restore compromised system to
it's pre-malware state. It also won't protect from other hardware or
software failures - I've had a PSU blow and kill every hard drive
and CD/DVD drive in the system, I've also had duff raid drivers
corrupt both drives in the RAID array, and do stupid things like
rebuilding the wrong drive - using the 'corrupt' drive to rebuild
the 'ok' drive.
RAID 1 adds a bit of data security - but if you value your data, you
still need backups.
It's not an "or" question, really. It's an "and" question.
You want Raid-1 on a system where you cannot afford for that system to be
offline for even a moment due to a hard drive failure. Having completely
restorable backups is no comfort to your customers if they have to wait 2
hours for the restore to take place.
Your point, however, is quite valid. Raid-1 with no backups is only
slightly better than a single disk with no backups. And only very slightly
(Starts to digress into Virtual Server Clusters and SANs, realizes this is
about home PCs and not work, and wanders off, muttering to himself...)
Rob Wynne / The Autographed Cat / doc@xxxxxxxxxxx
http://www.autographedcat.com/ / http://autographedcat.livejournal.com/
Gafilk 2010: Jan 8-10, 2010 - Atlanta, GA - http://www.gafilk.org/
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