Perbix, Michael schrieb:
can you elaborate further on this problem in case I am not understanding correctly...my servers are on UPS power with generator backup.
-Mike
________________________________________
From: macos-x-server-bounces+perbix=email@hidden [macos-x-server-bounces+perbix=email@hidden] On Behalf Of Dan Shoop [email@hidden]
Sent: Friday, October 12, 2007 10:56 PM
To: Andre Downer
Cc: email@hidden
Subject: Re: Xserve
On Oct 12, 2007, at 4:22 PM, Andre Downer wrote:
Yes have to get the card, standard card supports strip and mirror
in software only.
A.
On Oct 12, 2007, at 4:10 PM, Silas Thomas <email@hidden> wrote:
Hello All,
We are considering making a purchase of an Xserve but I'm
wondering if the built in or default SATA controller supports raid
5, or do you have to buy the Xserve Raid card for it? From what I
can tell it looks like you have to buy the raid card.
In reality you rarely want a hw raid 5 card b/c of the power off /
write cache problem.
apple xserve website..
Optional Internal RAID
Using software RAID built in to
Mac OS X Server, you can stripe two or three internal drives into a
RAID 0 array to increase performance or create a RAID 1 array for data
protection against a drive failure. For the ultimate in data
protection, add the optional Xserve RAID card to your system. With
256MB of RAID cache and hardware RAID levels 0, 1, and 5, the Xserve
RAID card delivers up to 198MB/s RAID 5 performance(2) for
the most demanding server workloads – without taking a valuable PCI
Express expansion slot.
With a built-in battery that protects the RAID
cache for up to 72-hours, your data is further protected from
unexpected power outages.
So, as i intend this, the cache should be written when power is on
again.
--
mit freundlichen Gruessen
Maximilian Sichart
<-------------------------------->
sichart.org - Agentur für Kommunikation und Projektmanagement
Kommunikationsdesign
Zope-Hosting Programmierung
Dipl.Designer
Maximilian Sichart
Visuelle Kommunikation
Zentgrafenstrasse 134
D-34130 Kassel
USt-IdNr.: DE813829797
mail:email@hidden
Fon : 0561 5218080
Fax : 0561 5218081
mobil : 0561 9847602
<-------------------------------->
