RAID Policy IO Scheduler

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Raid

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Installing the Software

#rpm-IVH http://192.168.97.250/rpms/storcli-1.04.07-1.noarch.rpm

View

#/opt/megaraid/storcli/storcli64/c0/vall Show

#/opt/megaraid/storcli/storcli64/c0/eall/sall Show

Change RAID write policy to always write back,c0 = control 0, V0 = Vd0,vall = All the VD

#/opt/megaraid/storcli/storcli64/c0/vall Set WRCACHE=AWB

#/opt/megaraid/storcli/storcli64/c0/v0 Set WRCACHE=WT

Change the RAID IO policy to direct

#/opt/megaraid/storcli/storcli64/c0/vall Set iopolicy=cached

#/opt/megaraid/storcli/storcli64/c0/v1 Set Iopolicy=direct

[Email protected] storcli]#/opt/megaraid/storcli/storcli64/c0/eall/sall Show

Controller = 0

Status = Success

Description = Show Drive information succeeded.

Drive information:

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Eid:slt did state DG Size Intf Med SED PI sesz Model Sp

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20:0 onln 0 558.406 GB SAS HDD n n 512B al14seb060n U

20:1 onln 0 558.406 GB SAS HDD n n 512B al14seb060n U

20:2 onln 0 558.406 GB SAS HDD n n 512B al14seb060n U

20:3 onln 0 558.406 GB SAS HDD n n 512B al14seb060n U

20:4 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:5 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:6 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:7 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:8 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:9 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:10 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

20:11 onln 1 446.625 GB SATA SSD N n 512B INTEL ssdsc2bb480g6 U

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Eid-enclosure Device id| Slt-slot no.| Did-device id| Dg-drivegroup

dhs-dedicated Hot spare| Ugood-unconfigured good| Ghs-global Hotspare

Ubad-unconfigured bad| onln-online| offln-offline| Intf-interface

Med-media type| Sed-self encryptive drive| Pi-protection Info

Sesz-sector size| sp-spun| u-up| d-down| t-transition| F-foreign

ugunsp-unsupported

[Email protected] storcli]#/opt/megaraid/storcli/storcli64/c0/vall Show

Controller = 0

Status = Success

Description = None

Virtual Drives:

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DG/VD TYPE State Access consist Cache SCC Size Name

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0/0 RAID5 OPTL RW Yes RWTC-49.999 GB

1/1 RAID5 OPTL RW Yes RAWBD-3.052 TB

0/2 RAID5 OPTL RW Yes RWTC-1.586 TB

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cac=cachecade| rec=recovery| ofln=offline| Pdgd=partially degraded|dgrd=degraded

Optl=optimal|ro=read Only|rw=read write| b=blocked| Consist=consistent|

R=read Ahead always| Nr=no Read ahead| wb=writeback|

Awb=always writeback| wt=writethrough| C=cached io| D=direct io|scc=scheduled

Check consistency

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IO Scheduler

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View

#grep-H ^/sys/block/{s,v}d*/queue/scheduler 2>/dev/null

Change to Deadline

#ls/sys/block/sd*/queue/scheduler |while Read i;do echo deadline > $i;d One

Write to boot from boot

#ls/sys/block/sd*/queue/scheduler |while Read I;do echo "echo Deadline > $i" >>/etc/rc.d/rc.local;done

#echo "Deadline" >/sys/block/sdb/queue/scheduler

#echo "echo Deadline >/sys/block/sdb/queue/scheduler" >>/etc/rc.d/rc.local

RAID Policy IO Scheduler