Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Soft-RAID and Hard-RAID?

STOOPPP!!!

Thank you very much but I know how RAID systems work, and if I need speed and safety I WILL NEVER use an IDE-RAID!

I just want safety for the boot-disk of a server. So i`m looking for an ATA-Card that supports RAID-1 and is bootable.

All Cards I know only do RAID-0.

So is there an ATA-Card that supports RAID-1 (hardware-RAID)?

or

Can I trust on Apples SoftRAID solution?

Thanks,
Christoph


Kok-Yong Tan wrote:
At 11:08 -0500 04/29/2002, Oliver Block wrote:

If you need extra speed AND safety, you may want to check out RAID-5 arrays
which use a type of striping AND mirroring and need only a fraction of the
hard disk space used by RAID-1. I'm sure someone else on the list can
explain how RAID-5 works better than I can, so I won't even try.


Uh...while your RAID-0 and RAID-1 explanations are absolutely correct, RAID-5 doesn't work that way. What you're describing as RAID-5 is actually RAID-0+1 or RAID-10. Here's a couple of URLs that explain it quite clearly:

http://www.enhance-tech.com/t/raiddef.html
http://www.mylex.com/documents/raid_levels.htm

Another pro/con argument is that RAID-1 is great if you absolutely need to be up 100% of the time, and not just 99.99999% of the time (assuming you have hot-swappable bays) but it is expensive, obviously. RAID-3 through RAID-5 is great if you don't have to be up 100% of the time but still need protection against drive failure (because even if you have hot-swappable bays, it takes time to rebuild the data after you swap out the bad drive with a blank good drive: the rebuild time being dependent on how much data was on the RAID system before one drive went bad).

Hope this helps.



--
Dipl. Ing. Christoph Ewering
C & E Informationdienste GbR
Tel: +49 5254 806866
Fax: +49 5254 806864
Mobil: +49 173 5662661
_______________________________________________
macos-x-server mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/macos-x-server
Do not post admin requests to the list. They will be ignored.
References: 
 >RE: Soft-RAID and Hard-RAID? (From: Oliver Block <email@hidden>)
 >RE: Soft-RAID and Hard-RAID? (From: Kok-Yong Tan <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.