Very high load during mkfs on a new 1tb raid 1
daniele-ml at libertyline.it
Tue Apr 20 15:54:01 CDT 2010
On 04/20/2010 07:35 PM, Jefferson Ogata wrote:
> Fast initialization just means it marks the array as ready and continues
> scrubbing in the background. The scrubbing competes heavily for I/O.
Ok I have reinitialized the array with the slow initialization method.
> Use MegaCLI to check initialization status, e.g. "MegaCLI -ldbi
> -showprog -lall -aall".
[root at ns01 daniele]# /opt/MegaRAID/MegaCli/MegaCli -ldbi -showprog -lall
Background Initialization on VD #0 is not in Progress.
Background Initialization on VD #1 is not in Progress.
[root at ns01 daniele]# omreport storage vdisk
List of Virtual Disks in the System
Controller PERC 6/i Integrated (Embedded)
ID : 1
Status : Ok
Name : Data
State : Ready
HotSpare Policy violated : Not Assigned
Virtual Disk Bad Blocks : Not Applicable
Secured : Not Applicable
Progress : Not Applicable
Layout : RAID-1
Size : 931.00 GB (999653638144 bytes)
Device Name : /dev/sdd
Bus Protocol : SAS
Media : HDD
Read Policy : Read Ahead
Write Policy : Write Back
Cache Policy : Not Applicable
Stripe Element Size : 64 KB
Disk Cache Policy : Enabled
> Or look at the disks when you aren't doing anything. Are they both lit
> up heavily?
The disks are 200Km away from me :-( so I cannot check them.
I tried to create the filesystem after the slow initialization but the
issue is still present.
A simple dd if=/dev/zero of=/dev/sdd1 exibits the same problem , after
30 seconds the load is already about 46 and all the waiting processes
are in state D
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