Hi friends,
I am currently running out of ideas to find the reason for my RAID 5 Performance problem with the IRST system. May be someone can help me.
I got a GA-H57M-USB3 Board , because it seems to be a good choice for a low power PC in combination with the i5 650 when using the build in GP of the CPU. Also it should support RAID5 for the Intel SATA Controller, so I hoped to replace my “energy eating” Synology DS508 RAID system as well.
The board is running fine and power consumption is nearly as expected, but the problem is that the RAID5 mode seems to be useless because it is extremely slow.
On different sides I found a lot of threads regarding the RAID5 speed problems with the IRST software and some of them seem to be fixed. But none of these tips fixed my problem.
I currently use 4 x 1TB 2,5” Toshiba disks. I had ordered 6 but 2 of them did not pass my tests with the smartctl utility. Installed is the latest driver version from the Intel Download side (10.1.0.1008). Used Software: Win-7 64 Bit(Business), smartrctl, ATTO Disk Benchmark.
Win7 is installed on a single SSD which is connected to the first SATA port of the other SATA Controller. This should make sure that the RAID system is in power safe mode, most of the idle time.
For the RAID5 Problem I made the following tests:
- Disabled Array and checked all disks in single mode: Read and Write speed was between 80 and 100 MB/sec
- Read/Write checked the single disks(not array configuration) by copying 100 GB of data across. All fine. So hardware and cabling must be fine.
- Used only 3 disks in the array (idea: 2TB limit) . Does not fix the problem.
- Played around with different stripe sizes. No change.
- Double checked the disks with smartctl
Currently the “Initialization” is running, but after 24 hours it has just reached 30%. I do not believe that this is normal?
And do not believe that this will fix the problem.
I think I must not say that this test needs hours :-(
Grettings