Thread: RAID Cache
November 20th, 2011, 05:40 PM #1
I have bought a new server for the office, it's HP ML110 G7 which has been upgraded with an additional 8 GB of RAM to bring it up to a total of 10 GB of RAM, HP P212i/ZM RAID controller and two 1 TB Enterprise SATA HDD's
The server will be used to run ESXi 5.0.0 which will be used to host various machines for software development and testing purposes mainly .net builds, SQL Server etc. There will be a very light load on the server.
I have created 1 RAID 1 logical disk which is used as the data store for all VM's running on the box for both windows and data however I am getting very poor performance on writes, I am struggling to get 2 or 3 MB/s however reads are reasonable at 30-40 MB/s
I understand that the RAID controller is a zero memory type and I was wondering if I purchase the 256 MB upgrade for this card, will the write speeds improve. I don't want to go spending money if it wont make any difference.
I am also getting latency warnings, sometimes up to 5 seconds when the disk is busy.
Disk access to a single disk which is also connected to the controller card is good, 100 MB/s is the typical speeds.
Any help would be greatly appreciated.
Q6600 | GA-PS35-DS3R | 8 Gb RAM | 2 x 64 Gb SSD RAID 0 | 8600GT
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