|
|
|
|
| Author |
Message |
onetimeonlyposter
GURU
Joined: 06 Nov 2004
Posts: 832
|
 Posted: Fri Nov 24, 2006 12:35 am Post subject: On board SAS versus PCIe card |
 |
|
I'm about to put a medium duty server together and am new to SAS (serial
attached SCSI) and the difference between on-board controllers and add-in
cards.
I'm looking at a Tyan n6650W (S2915) S2915WA2NRF Motherboard with a LSI
1068E on-board SAS controller.
The other option is a similar Tyan board S2915A2NRF that comes without the
SAS controller to which I would add in an Adaptec 4805 PCI Express SAS Raid
controller.
....although I could still change my mind about mainboards, etc.
As near as I can tell, the on-board option supports raid 0 and 1, but not
10, which is likely what I want.
The Adaptec card supports multiple raid types including 10, but is about
$700.
If I definitely go with Raid 10, it looks like the on-board controller
option is out. If I go with another raid type, I can still consider it.
Another option is a Tyan h2000M motherboard (that will handle more memory),
which has an optional SAS controller add-in card (M9000-10) that will handle
RAID 10 for about $100. From what I gather, this card is a PCIx and not
PCIe, however.
....but I am wondering about other pros and cons to on-board versus add-in.
If I understand correctly, the PCIx RAID cards might not be able to handle
the max bandwidth of 4 15K SAS drives, but the PCIe cards will. I don't know
what to expect from the on-board controllers.
Could someone point me in the right direction?
Jeff
--
Posted via a free Usenet account from http://www.teranews.com |
|
| Back to top |
|
 |
|
|
Folkert Rienstra
Guest
|
| Posted: Fri Nov 24, 2006 3:59 am Post subject: Re: On board SAS versus PCIe card |
|
|
"Jeff" <none@none.com> wrote in message news:45660755$0$21101$88260bb3@free.teranews.com
| Quote: | I'm about to put a medium duty server together and am new to SAS (serial
attached SCSI) and the difference between on-board controllers and add-in
cards.
I'm looking at a Tyan n6650W (S2915) S2915WA2NRF Motherboard with a LSI
1068E on-board SAS controller.
The other option is a similar Tyan board S2915A2NRF that comes without the
SAS controller to which I would add in an Adaptec 4805 PCI Express SAS Raid
controller.
...although I could still change my mind about mainboards, etc.
As near as I can tell, the on-board option supports raid 0 and 1, but not
10, which is likely what I want.
The Adaptec card supports multiple raid types including 10, but is about
$700.
If I definitely go with Raid 10, it looks like the on-board controller
option is out. If I go with another raid type, I can still consider it.
Another option is a Tyan h2000M motherboard (that will handle more memory),
which has an optional SAS controller add-in card (M9000-10) that will handle
RAID 10 for about $100. From what I gather, this card is a PCIx and not
PCIe, however.
...but I am wondering about other pros and cons to on-board versus add-in.
If I understand correctly,
|
From what?
| Quote: | the PCIx RAID cards might not be able to handle the max bandwidth of 4
15K SAS drives,
|
Why not?
(Even 'standard' 66Mhz 64-bit PCI (~500MB/s) may well support it).
PCI-X has many flavors ....
| Quote: | but the PCIe cards will.
|
.... as does PCIe.
Only difference is that PCI-X maybe be running out of future whereas
PCIe is the future. But PCI-X is still way ahead of current use/need.
| Quote: | I don't know what to expect from the on-board controllers.
|
What it says in the user manual.
| Quote: |
Could someone point me in the right direction?
Jeff |
|
|
| Back to top |
|
|
|
|
| |
Watched Topics
Search
Register
Log in to check your private messages
Profile
Log in
Memberlist
Usergroups