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DL380 G7 P410i Disk Reads Slow

 
flumpydog
Occasional Visitor

DL380 G7 P410i Disk Reads Slow

Hi,

I am just setting up some DL360 G7 servers with the P410i 1GB and 8 x 146GB 15K drives. The disks are being configured as a single Raid 10 unit and I am installing Centos 7 on these. One of the servers is showing slow disk reads in comparison to the others and I am not sure why. I have used the CLI to generate an output of the disks and raid config and the systems are identical, same firmware, settings in the bios, disk partitions, etc.

Problem server performace running hdparm - Timing buffered disk reads: 1448 MB in  3.00 seconds = 482.24 MB/sec

Other servers - Timing buffered disk reads: 2364 MB in  3.00 seconds = 787.71 MB/sec

As you can see, there is quite a difference in the reads between these two devices. I pulled all the disks from the slower unit, replaced them with other disks and same problem exists. I have started out from scratch a couple times, redoing the raid unit, re-installing the OS and still the same. I have confirmed the BBW is charged and working and cache settings are the same as on the other servers.

Any suggestions on what I can do to troubleshoot this further and fix this?

Many Thanks,

Chuck