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Disk reporting low IOPS and MBPS - ODA (Doc ID 2268148.1)

Last updated on FEBRUARY 12, 2020

Applies to:

Oracle Database Appliance X3-2 - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

Newly deployed 12.1.2.9.0 ODA X3-2,

running 'oakcli validate -c DiskCalibration' shows one SAS disk having just over half the MB/s as the rest:

RESULT: Random read throughput of HDD_E0_S15_3xxxxxxx6 is 234 IOPS 147 MBPS
RESULT: Random read throughput of HDD_E0_S17_3xxxxxxx4 is 238 IOPS 153 MBPS
RESULT: Random read throughput of HDD_E0_S07_3xxxxxxx2 is 235 IOPS 148 MBPS
RESULT: Random read throughput of HDD_E0_S04_3xxxxxxx6 is 227 IOPS 147 MBPS
RESULT: Random read throughput of HDD_E0_S01_3xxxxxxx6 is 238 IOPS 151 MBPS
RESULT: Random read throughput of HDD_E0_S05_3xxxxxxx2 is 237 IOPS 147 MBPS
RESULT: Random read throughput of HDD_E0_S10_3xxxxxxx8 is 204 IOPS 130 MBPS
RESULT: Random read throughput of HDD_E0_S09_3xxxxxxx4 is 230 IOPS 144 MBPS
RESULT: Random read throughput of HDD_E0_S12_3xxxxxxx4 is 234 IOPS 152 MBPS
RESULT: Random read throughput of HDD_E0_S18_3xxxxxxx4 is 237 IOPS 148 MBPS
RESULT: Random read throughput of HDD_E0_S14_3xxxxxxx0 is 236 IOPS 150 MBPS
RESULT: Random read throughput of HDD_E0_S00_3xxxxxxx4 is 232 IOPS 145 MBPS
RESULT: Random read throughput of HDD_E0_S13_3xxxxxxx8 is 234 IOPS 149 MBPS
RESULT: Random read throughput of HDD_E0_S06_3xxxxxxx6 is 238 IOPS 149 MBPS
RESULT: Random read throughput of HDD_E0_S03_3xxxxxxx4 is 235 IOPS 148 MBPS
RESULT: Random read throughput of HDD_E0_S19_3xxxxxxx2 is 231 IOPS 151 MBPS
RESULT: Random read throughput of HDD_E0_S16_3xxxxxxx0 is 224 IOPS   82 MBPS <RESULT: Random read throughput of HDD_E0_S08_3xxxxxxx6 is 229 IOPS 146 MBPS
RESULT: Random read throughput of HDD_E0_S11_3xxxxxxx0 is 232 IOPS 147 MBPS
RESULT: Random read throughput of HDD_E0_S02_3xxxxxxx8 is 233 IOPS 149 MBPS

 

The following command's output indicate the disk looks fine.

# oakclistordiag e0_pd_16 --> No issues

# smartctl --all /dev/sdao --> No issues

 

There is no direct errors for the disk was seen, reboot node does not help.

 

Changes

 Newly deployed 12.1.2.9.0 ODA X3-2

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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