Perc 5i very poor performance with 8x 1 TB hard drives

August 16, 2013 at 16:24:09
Specs: Windows Server 2012, XEON Quad Core 2.5

I bought a server with 8x 1 TB hard drives with the model number WDC WD1000FYPS-01ZKB0 connected to a PERC 5i RAID controller card. I configured the array to work as either a RAID 0 or a RAID 10, and I am getting from 500 MB/s all the way down to 70 MB/s and even sometimes 2 MB/s. What is going on?

The primary purpose is to make a storage server, plus decent access to it via the network. I know that the network is only 100 MB/s over gigabit.

I know that GreenPower drives are the worst to be used in a RAID array but these hard drives are designed for RAID, so I am not sure if this is the issue.

So could anyone help me out with getting this to work correctly? All I want is a redundant 4 TB file server which has at least 200-300 MB/s read and write, that way I can use it on my network and also do full offline backups without any slowdowns.

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August 21, 2013 at 12:18:18
Make sure you have the firmware on your Perc5i updated to the latest.

Are you testing read or writes (or both)? Getting 500MB/s is about where you should be in theory with 7200RPM drives in that configuration.

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August 21, 2013 at 16:14:39
Note that RAID 0 is not redundant and not a good choice for your purposes.
Stay with the RAID 10 if you value your data of your backups become more critical.

You have to be a little bit crazy to keep you from going insane.

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