Intel motherboard and SATA/RAID ...

2004-11-05 Thread Marc G. Fournier
Dual-channel SATA 100 (two connectors) integrated with RAID 0 and 1 
support

If I have 4 drives in the above, could I stripe two to each other and then 
mirror those together?  Or is it strip *or* mirror?

also, not sure if this is a no brainer, but would FreeBSD support that 
resultant array?


Marc G. Fournier   Hub.Org Networking Services (http://www.hub.org)
Email: [EMAIL PROTECTED]   Yahoo!: yscrappy  ICQ: 7615664
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Re: Intel motherboard and SATA/RAID ...

2004-11-05 Thread Scott Gerhardt
There are only two channels so you can only have 2 drives in raid 1 or 
0. Don't use 0 unless you don't care about your data.
You didn't specify the type of motherboard or SATA RAID chipset, but 
all of those onboard RAID controllers are not true hardware raid (Host 
raid) and require special software drivers in the OS.  You are much 
better off purchasing a separate hardware raid controller such as the 
3Ware 8006-2LP 2 port, 3Ware 9500S-4LP 4 port, Adaptec 2410SA 4-port 
controllers.  They do true hardware raid and work with FreeBSD.

Hope that answers your question.
Thanks,
--
Scott A. Gerhardt, P.Geo.
Gerhardt Information Technologies
On Nov 5, 2004, at 12:32 PM, Marc G. Fournier wrote:
Dual-channel SATA 100 (two connectors) integrated with RAID 0 and 1 
support

If I have 4 drives in the above, could I stripe two to each other and 
then mirror those together?  Or is it strip *or* mirror?

also, not sure if this is a no brainer, but would FreeBSD support that 
resultant array?


Marc G. Fournier   Hub.Org Networking Services 
(http://www.hub.org)
Email: [EMAIL PROTECTED]   Yahoo!: yscrappy  ICQ: 
7615664
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Re: Intel motherboard and SATA/RAID ...

2004-11-05 Thread Marc G. Fournier
On Fri, 5 Nov 2004, Scott Gerhardt wrote:
There are only two channels so you can only have 2 drives in raid 1 or 0. 
Don't use 0 unless you don't care about your data.
You didn't specify the type of motherboard or SATA RAID chipset, but all of 
those onboard RAID controllers are not true hardware raid (Host raid) and 
require special software drivers in the OS.  You are much better off 
purchasing a separate hardware raid controller such as the 3Ware 8006-2LP 2 
port, 3Ware 9500S-4LP 4 port, Adaptec 2410SA 4-port controllers.  They do 
true hardware raid and work with FreeBSD.

Hope that answers your question.
Unfortunately ... yup :)  I was hoping to avoid the extra cost, but glad 
to have it confirmed ... thanks ...

BTW, the motherboard/chassis is the Intel SR1400/SE7520JR2 ... which, 
re-looking at the specs negates the original question anyway :)  it only 
holds 3 drives ...

Thanks though ...

Marc G. Fournier   Hub.Org Networking Services (http://www.hub.org)
Email: [EMAIL PROTECTED]   Yahoo!: yscrappy  ICQ: 7615664
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3Ware Controllers (Was: Re: Intel motherboard and SATA/RAID ...)

2004-11-05 Thread Marc G. Fournier
On Fri, 5 Nov 2004, Marc G. Fournier wrote:
On Fri, 5 Nov 2004, Scott Gerhardt wrote:
There are only two channels so you can only have 2 drives in raid 1 or 0. 
Don't use 0 unless you don't care about your data.
You didn't specify the type of motherboard or SATA RAID chipset, but all of 
those onboard RAID controllers are not true hardware raid (Host raid) and 
require special software drivers in the OS.  You are much better off 
purchasing a separate hardware raid controller such as the 3Ware 8006-2LP 2 
port, 3Ware 9500S-4LP 4 port, Adaptec 2410SA 4-port controllers.  They do 
true hardware raid and work with FreeBSD.

Hope that answers your question.
Unfortunately ... yup :)  I was hoping to avoid the extra cost, but glad to 
have it confirmed ... thanks ...

BTW, the motherboard/chassis is the Intel SR1400/SE7520JR2 ... which, 
re-looking at the specs negates the original question anyway :)  it only 
holds 3 drives ...

Thanks though ...
Wait, now I'm a bit nervous, as this is the first time I use SATA on 
anything but a desktop ... so my experiences are limited to 'single drive' 
systems ...

The 8006-2LP ... how many drives will that support?  Just 2, right?  And 
the 9500-4LP will support 4?  So, is it one cable that goes from the 
controller card to the chassis SATA backplane?

From reading their web site, multiple cable would be the MI cards, 
instead of the regular ones ... right?

Marc G. Fournier   Hub.Org Networking Services (http://www.hub.org)
Email: [EMAIL PROTECTED]   Yahoo!: yscrappy  ICQ: 7615664
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Re: Intel motherboard and SATA/RAID ...

2004-11-05 Thread steveb99
Marc G. Fournier wrote:
Dual-channel SATA 100 (two connectors) integrated with RAID 0 and 1 
support

If I have 4 drives in the above, could I stripe two to each other and 
then mirror those together?  Or is it strip *or* mirror?

also, not sure if this is a no brainer, but would FreeBSD support that 
resultant array?
The two variations your are talking about are referred to as RAID 0 + 1, 
or RAID 10 depending on the order you stripe and mirror.  I assume this 
is hardware RAID so FreeBSD shouldn't even know its there.  You will 
create a logical drive from the RAID set you create and that is what 
FBSD will see.  That is one of the reasons I like hardware RAID vs 
software RAID is the OS doesn't even know about it, it is just a drive 
to the OS. 

Steve Barnette

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