DS3610 Slow Write Speeds

[Patrick Murphy]

I have a DS3610 Disk enclosure attached to a HP DL380 G10 with an E208e-p Smart Array running Centos 7.   The disk enclosure is configured with 6 8TB SAS 7.2K LFF SC 512E DS HDDs in Raid 5 configuration.   I am experiencing very slow write speeds to this array.   I have patched the OS and applied the latest firmware.  Below are the hdparm -tT  and iostat results.    The device is saturated based upon the iostat $util.  What could be causing the slow write speed as given by the iostat w/s value?  Any help would be appreciated.

hdparm -tT /dev/sdd

/dev/sdd:
Timing cached reads: 16072 MB in 1.99 seconds = 8079.71 MB/sec
Timing buffered disk reads: 122 MB in 3.06 seconds = 39.92 MB/sec

iostat -dxz 1

Device: rrqm/s wrqm/s r/s      w/s       rkB/s   wkB/s      avgrq-sz   avgqu-sz  await  r_await    w_await  svctm %util
sdd       0.00     256.00 0.00  120.00  0.00    6120.00   102.00      10.43        101.38   0.00       101.38    8.33    100.00

[Parvez_AL]

Hello @Patrick Murphy 

As there is no response to the query yet, I would recommend to directly contact technical support and log a support call for quicker resolution. Please refer the links below for support ticket options:

https://support.hpe.com/help/en/Content/supportAndOtherResources.html

https://www.hpe.com/psnow/doc/A00039121ENW