SAS Array with or without expander

Posted by tegbains on Server Fault See other posts from Server Fault or by tegbains
Published on 2009-08-18T06:48:03Z Indexed on 2010/04/08 3:43 UTC
Read the original article Hit count: 495

Filed under:

sas

|

raid

|

zfs

|

Performance

Is it better to use a SAS Expander backplane for 12 drives via one SAS connection or is it better to use a SAS backplane with 3 SAS connections? This is in terms of performance, rather than expansion. This array will be setup using ZFS on a OpenSolaris via a LSI SAS controller as an iSCSI target.

The two products being considered are the SuperMicro SuperChassis 826A-R1200LPB or the SuperChassis 826E2-R800LPB

© Server Fault or respective owner

Related posts about sas

Scheduling of SAS generated codes in SAS DI studio to IBM TWS

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Guys, I`m sure some you might have used both SAS DI studio and IBM TWS. Has anone managed to run codes generated in SAS DI studio in TWS scheduler , What are the kind of issues you have faced? And it would be great if you could suggest possible solutions >>> More
Tutoriel SAS : Lire des classeurs Excel 2007 avec SAS 9.1, par Stéphane Colas

as seen on Developper.com - Search for 'Developper.com'
Bonjour, Retrouvez ci-dessous notre dernier tutoriel SAS : Lire des classeurs Excel 2007 avec SAS 9.1, par Stéphane COLAS. N'hésitez pas à donner votre point de vue Bonne lecture ... >>> More
Livre SAS : Économétrie théorie et application sous SAS, par V. Delsart, A. Rys et N. Vaneecloo

as seen on Developper.com - Search for 'Developper.com'
Bonjour, J'ai eu le plaisir de lire pour vous Econométrie théorie et application sous SAS, de Virginie Delsart, Arnaud Rys et Nicolas Vaneecloo. N'hésitez pas à régair ou poser des questions si vous souhaitez davantage d'informations Bonne lecture... >>> More
SAS unifie la vision des risques pour les banques avec SAS Risk Management for Banking

as seen on Developper.com - Search for 'Developper.com'
SAS unifie la vision des risques pour les banques Avec SAS Risk Management for Banking SAS lance SAS Risk Management for Banking, une solution intégrée dédiée à la gestion des risques dans le secteur de la banque. Cette solution exploite les fonctionnalités de la plate-forme SAS Business Analytics… >>> More
SAS Expanders vs Direct Attached (SAS)?

as seen on Server Fault - Search for 'Server Fault'
I have a storage unit with 2 backplanes. One backplane holds 24 disks, one backplane holds 12 disks. Each backplane is independently connected to a SFF-8087 port (4 channel/12Gbit) to the raid card. Here is where my question really comes in. Can or how easily can a backplane be overloaded? … >>> More

Related posts about raid

Booting from integrated RAID controller when another RAID controller is installed in a PCIe slot

as seen on Server Fault - Search for 'Server Fault'
I have a GA MA785GT UD3H motherboard with Windows Server 2008 R2 installed on a RAID1 using the on-board RAID controller. I have now installed a RocketRaid 2680 controller and set up a RAID5 for all my data to be stored on. Unfortunately I now cannot boot from the RAID1 anymore, the PC is trying… >>> More
Onboard RAID vs Software RAID

as seen on Server Fault - Search for 'Server Fault'
My motherboard, an Asus M4a79t Deluxe, advertises RAID 0/1/5 capabilities. My limited understanding is that onboard RAID is better than software RAID. Is this necessarily true? Is an onboard RAID controller closer in performance to a software controller or a dedicated hardware controller? >>> More
RAID-1 and regular drive removal (using RAID-1 as a backup measure)

as seen on Super User - Search for 'Super User'
Is using mdadm's RAID-1 of 2 partitions (one on laptop's internal HDD, one on external HDD) a good idea. I want the system to work as RAID-1 if both drives are present, work as regular volume (degradad RAID-1) if external HDD is unplugged and quickly resync when I plug external HDD again. Questions: Is… >>> More
Explain difference in SQLIO numbers for RAID 0 versus RAID 5 over 6 disks

as seen on Stack Overflow - Search for 'Stack Overflow'
When using the SQLIO benchmark tool on a 4-core Dell server with 6 15k 450GB (fast) drives, RAID 0, we found the max throughput was 2MB per second. But when configured as RAID 5, we get 30 MB per second. It seems that the RAID controller, Dell Perc 5i integrated controller, is maxing out the… >>> More
RAID 5 RECONSTRUCT with RAID Reconstructor

as seen on Server Fault - Search for 'Server Fault'
I have Dell Poweredge server 2600 with Raid 5 in 3 hard drive Scsi 36gb each, it was fail to boot sinc the third drive is offline. I attached Sata card adapter to Sata hard drive and install OS SERVER 2003 to it, downloaded drivers for Raid and everything goes fine when I use recovery data software… >>> More