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Old 01-03-2013, 11:00 PM   #1
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Registered: Dec 2012
Posts: 4

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SATA Disk performance slow via HBA Card


We are have set of two different servers

One set is

IBM System X3950
Storage : DS-3400
Connected Via: Qlogic ISP-2442 qla-4xxxx HBA Card
OS: Oracle Enterprises Linux 64 Bit 5.8
DB & Apps: Oracle EBS R12
LVM Used

Here there is no issues on IO performance with SATA Disks

Other set is

IBM System X3950
Storage : DS-3400 x 2 (1 is SAS, other is SATA)
connected via : Two different QLogic ISP-2442 qla-4xxx HBA Cards(1 is for SAS, other is for SATA)
Combination of SAS & SATA Disks on two different SAN
OS: Oracle Enterprises Linux 64 Bit 5.8
DB & Apps: Oracle EBS R12
Multipath Used here

Here we are facing slow performance issue only with particular SATA Disk connected on SAN via HBA Card.

but, the same disk does not have any issues with 32Bit RHEL4 OS with same setup SAN & HBA Card.

On first server, it is working fine when it is alone SATA Disks on Oracle Linux 64Bit.

With this SATA Disk on RHEL5 total backup time is 8Hours,
but here in new setup it is 15 Hours.

Is it problem with combination of SAS & SATA Disks connected on two different SAN via two different HBA Cards & switch with Multipath

I have tried to exclude from Multipath for this disk, but performance is not increased, so I confirmed that this issue not with Multipathd.

Please advice me, is it because of SAS & SATA Combination of disks in two different SAN via HBA Cards/Switch

Thanks & Regards,
Old 01-04-2013, 12:18 AM   #2
Registered: Sep 2007
Location: Canada
Distribution: RHEL, Debian, SUSE
Posts: 34

Rep: Reputation: 1
Performance issues usually addressed by firmware update to your HBA controllers! I'm sure you have checked lots of things, but just wanted to throw this one out, and make sure you have done that.
Old 01-04-2013, 12:38 AM   #3
LQ Newbie
Registered: Dec 2012
Posts: 4

Original Poster
Rep: Reputation: Disabled
Thanks for your quick response,

As I mentioned with same firmware update on other (First Server) server it does not have any issues
and they are latest Firmware Update.

hdparm -t
-- result
average = 130MB+/secs in First Server on SATA Disk
average = 60MB-/secs in Second Server on SATA Disk


disk array, linux, performance, satadrives, slow

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