Separate HDD test using RAID controller Post: 302945626

Sponsored Content

Operating Systems Linux Red Hat Separate HDD test using RAID controller Post 302945626 by hicksd8 on Monday 1st of June 2015 06:10:22 AM

06-01-2015

Moderator

If you have identical machines with different RAID I/O performance the first thing to do is compare the RAID controller parameter settings. Yes, it could be a rogue hard drive but it's more likely to be the configuration.

Adaptec RAID controllers have all kinds of parameters which can be configured using the BIOS setup or other Adaptec provided tools. I suggest that you compare, parameter by parameter, the settings of poor performing RAID controller with a good performing RAID controller.

In particular, I would be looking at the cache setup. (Use Google to read about cache (i) write-through, (ii) write-around, and (iii) write-back. That setting will most definitely greatly affect performance.)

Also, Google for "Adaptec RAID cache" to read what they say about setting the cache; the pro's and the con's.

Also, of course, search THIS FORUM for threads about this subject as you will learn personal opinions and benefit from tons of experience available on here.

Repeat, if possible, compare all the settings on the Adaptec cards one by one.

Hope that helps. Let us all know how you get on with this.

Last edited by hicksd8; 06-02-2015 at 07:01 AM..

This User Gave Thanks to hicksd8 For This Post:

hicksd8

View Public Profile for hicksd8

Find all posts by hicksd8

10 More Discussions You Might Find Interesting

1. SCO

ultra 320 scsi raid controller driver for sco 5.0.6

I am facing a problem to install sco 5.0.6 in Dell Power Edge SC1420 which raid controller is ultra 320 scsi raid controller . how/from where to download the ultra 320 scsi raid controller driver for sco 5.0.6. Plz help with any idea karzon

2. SCO

driver needed for hp smartarry p200i sas raid controller

recently we have purchased hp proliant ml350 g5 server and configured raid 5 with hp smartarray p200i sas controller.but i could not found any sas raid controller hp smartarry p200i driver for sco unix 5.0.7 :(.i searched on hp support site,but no use.any one can help.

3. Solaris

RAID controller needed for SVM?

hi this may be a very stupid question, but im quite new to Solaris (gonna buid my first system, Solaris 10 on x86 system, connected to other windows systems in a home network) i wanna put a RAID 5 system in there to back up my other systems at home; iv read that its really so easy with SVM to...

4. Red Hat

linux server with raid controller card

I am planning on building a fedora box with raid controller (database server). Is anybody done that ? also what kind of software do you need to backup and recover data.

5. Hardware

Problem with External Raid Controller.

Hi, We have a Sunfire 4150 with On-Board Internal Raid Controller connected to 4 X 146 GB SAS disks. This also has an External Raid Controller (Storagetek Eight-Port, External HBA Model SG-XPCIESAS-R-EXT-Z) connected to a JBOD array ( Storagetek XTA2530 ) which has 5 X 300 GB Hard disk. ...

6. AIX

SCSI PCI - X RAID Controller card RAID 5 AIX Disks disappeared

Hello, I have a scsi pci x raid controller card on which I had created a disk array of 3 disks when I type lspv ; I used to see 3 physical disks ( two local disks and one raid 5 disk ) suddenly the raid 5 disk array disappeared ; so the hardware engineer thought the problem was with SCSI...

7. AIX

Internal PCI X RAID Controller issue ?

Hello folks, Could someone tell me why I unable to create pdisks for a RAID Array # lscfg | grep scsi + sisscsia0 U787A.001.DPM0707-P1 PCI-X Dual Channel Ultra320 SCSI Adapter + scsi0 U787A.001.DPM0707-P1-T10 PCI-X Dual Channel Ultra320 SCSI Adapter...

8. Red Hat

RAID Configuration for IBM Serveraid-7k SCSI RAID Controller

Hello, I want to delete a RAID configuration an old server has. Since i haven't the chance to work with the specific raid controller in the past can you please help me how to perform the configuraiton? I downloaded IBM ServeRAID Support CD but i wasn't able to configure the video card so i...

9. Shell Programming and Scripting

Controller is not going into IF test

Hi All, I am searching for some files (*.sem and *.chk and *.temp) in morethan one directories. if i found .sem and .chk files(base name should be same) i am deleting these 2 files because i need to delete .chk files if i found respective .sem file i am also deleting other .sem files only...

10. SCO

SCO OS 6 Driver for LSIL SAS1064E Raid Controller

Hi all, A client has an SCO OpenServer Server 6.0, that is running on an HP ProLiant Box and they lost the root password. Its equipped with a Doal-Core Intel Pentium Processor. They don't have any media or emergency disk anymore. I tried to boot with the CD Rom, then "Tools", then exit to...

LEARN ABOUT NETBSD

mfi

MFI(4)							   BSD Kernel Interfaces Manual 						    MFI(4)

NAME

     mfi -- LSI Logic & Dell MegaRAID SAS RAID controller

SYNOPSIS

     mfi* at pci? dev ? function ?

DESCRIPTION

     The mfi driver provides support for the MegaRAID SAS family of RAID controllers, including:

	   -   Dell PERC 5/e, PERC 5/i, PERC 6/e, PERC 6/i
	   -   Intel RAID Controller SRCSAS18E, SRCSAS144E
	   -   LSI Logic MegaRAID SAS 8208ELP, MegaRAID SAS 8208XLP, MegaRAID SAS 8300XLP, MegaRAID SAS 8308ELP, MegaRAID SAS 8344ELP, MegaRAID
	       SAS 8408E, MegaRAID SAS 8480E, MegaRAID SAS 8708ELP, MegaRAID SAS 8888ELP, MegaRAID SAS 8880EM2, MegaRAID SAS 9260-8i
	   -   IBM ServeRAID M1015, ServeRAID M5014

     These controllers support RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50 and RAID 60 using either SAS or SATA II drives.

     Although the controllers are actual RAID controllers, the driver makes them look just like SCSI controllers.  All RAID configuration is done
     through the controllers' BIOSes.

     mfi supports monitoring of the logical disks in the controller through the bioctl(8) and envstat(8) commands.

EVENTS

     The mfi driver is able to send events to powerd(8) if a logical drive in the controller is not online.  The state-changed event will be sent
     to the /etc/powerd/scripts/sensor_drive script when such condition happens.

SEE ALSO

     intro(4), pci(4), scsi(4), sd(4), bioctl(8), envstat(8), powerd(8)

HISTORY

     The mfi driver first appeared in NetBSD 4.0.

BSD
								  March 22, 2012							       BSD