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SSD performance on R430 server just dropped through the floor
We've had a new R430 server in operation for about 4 months now, but in the last two days SSD performance dropped off a cliff. No config changes were made so not sure what happened, prior to the last two days the SSDs have been exceptionally fast.
I don't think you can TRIM (or need to?) from the command line, is there perhaps a BIOS setting I need to enable for it?
The SSDs are 2x LITEON IT ECE-400NAS 400GB RAID1 setup behind PERC H330 card, R430 server running CentOS 7.1.
Plenty of disk space available
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 354G 101G 254G 29% /
Read speed benchmark:
# hdparm -Tt /dev/sda
Timing cached reads: 14570 MB in 2.00 seconds = 7291.07 MB/sec
Timing buffered disk reads: 32 MB in 3.02 seconds = 10.60 MB/sec
And write speed benchmark:
# dd if=/dev/zero of=tempfile bs=1M count=1024 conv=fdatasync,notrunc
1073741824 bytes (1.1 GB) copied, 148.132 s, 7.2 MB/s
So you can see 10MB/s reads and 7MB/s writes aren't really going to cut it. Where should I start looking for solutions?
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April 16th, 2015 18:00
Yes I rebooted the server but saw no changed. Also I have the DSU repository installed, but it is telling me I've got the latest available firmware installed:
[-]10 PERC H330 Mini Controller 0 Firmware
Current Version : 25.2.1.0037 same as : 25.2.1.0037
Why would the updated firmware you posted not be reflected by dsu?
DELL-Josh Cr
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April 16th, 2015 18:00
Hi,
Have you, are you able to reboot the server? Do you have Server administrator installed? Do either of the drives showed failed? Can you update the controller firmware it fixed some issues with SSDs falling offline. http://www.dell.com/support/home/us/en/04/Drivers/DriversDetails?driverId=5K40N
DELL-Josh Cr
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April 16th, 2015 19:00
It came out a few days ago and has not been added to the repository yet. It is version 25.2.2.0004
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April 16th, 2015 22:00
updated PERC firmware, but no change in performance.
Installed OMSA 8.0.2 but when looking at the Storage tab it shows the error "The initialization sequence of SAS components failed during system startup. SAS management and monitoring is not possible."
However using smartctl to run a short SSD health check on each drive, it completed without error
smartctl --test=short /dev/sda -d megaraid,1
DELL-Josh Cr
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April 17th, 2015 15:00
What version is it showing for the SAS backplane? Can you do a full power cycle, and not just a normal reboot, power off and power on, so that the PERC can be re-intialized? Try setting or checking the BIOS settings for low latency, http://i.dell.com/sites/content/shared-content/data-sheets/en/Documents/configuring-low-latency-environments-on-dell-poweredge-12g-servers.pdf
It is the same on 13G servers.
DELL-Josh Cr
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April 17th, 2015 17:00
I have not seen anything with the model drive that you have.
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April 17th, 2015 17:00
I was speaking with Dell support this morning and apparently there may be an issue with LITE-ON SSD firmware, but no ETA of when a firmware update might be released? Have you heard anything about that?
SMART output from both SSD drives #0 and #1 behind H330 PERC