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56939
March 4th, 2004 23:00
RAID 5 Scrub Time and Consistency Check Time for 432GB Volume
I want to find out how long it takes for the RAID5 (4 x 144GB), 432GB volume to undergo the 'Scrub' process. Also the time it will take to do the Consistency Check. The volume will be configured in PowerEdge 4400 with embedded PERC3/Di.
Appreciate any help in this.
Regards,
Skyport
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henkes5
3 Posts
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March 12th, 2004 14:00
I have a 477.68 GB RAID-10 volume and the consistency check started at 10:03 am on day 1 and finished at 9:24 on day 2!
Not sure about the scrub time!
Hope this helps
skyport
2 Posts
0
March 12th, 2004 15:00
Thanks henkes5,
I built the RAID5, 432GB volume and got the following result:
Model PE4400
Controller PERC2/DC
RAID TYPE 5 (4 x 144)
Drives Hitachi, Ultrastar IC35L146UCDY10-0 (RPM - 10K)
Initialize Time 5 seconds (very quick)
Consistency check 11 hours
Scrub Time Not Applicable (Since only Adaptec Controllers does the scrub - PERC x/xi (integrated on MB)
What puzzled me is the Initialize time which went so quick on LSI/AMI controller card vs the Scrub Time that would have
required had I used the Adaptec integrated controller. My understanding is that Initialize and Scrub are similar process
that build the parity information. According to a Dell Support person, scrub time is estimated at 1 min/GB. It also
depends on Raid type, Stripe Width ...etc. I hope Forum Admin could enlighten us in this.
Regards,
Skyport
DPYeilding
80 Posts
0
October 3rd, 2006 13:00
You can manually run a consistency check in Storage Management using these instructions
http://support.dell.com/support/edocs/software/OMSS10UG/vdmgmt.html#323112
or if you save the CLI commands below to a batch file than use Windows Task Scheduler they can be run during off peak hours, which is more beneficial.
Instructions on how to run the CLI Commands using Task Scheduler
Go to a command line and run the following command to display the virtual disks and controllers. You do this because in the batch file you will have to specify the controller and virtual disk you would like to scan.
omreport storage controller to display the controller IDs
omreport storage vdisk controller=ID to display the IDs for the virtual disks attached to the controller.
Once you have the information above you will next open notepad and save the file to the root of C as cons_check.bat or a similar name. You will need to create one for each virtual disk you would like to check.
Inside the file you will add the necessary commands to check the consistency on the selected virtual disk and controller.
Example Syntax
For example, to run a check consistency on virtual disk 4 on controller 1, you would enter the text below into the cons_check.bat file and save it.
omconfig storage vdisk action=checkconsistency controller=1 vdisk=4
Once that is complete you will use the Windows Task Scheduler Wizard to run the batch file during off peak hours.
1. Click the Start button, point to Programs, point to Accessories, and then click Add Scheduled Task.
The Scheduled Task Wizard appears.
2. Click next and follow the onscreen directions. Click Browse and locate the batch file you created above
NOTE: The minimum recommendation for this task is to be run at least once a month
Thank You,