Test 3b has the same speed as Test 3a (about 60 MB/s). For me its a good thing and a bad thing. As soon as i plug in both sas cards the speed drops to 25MB/s. I hoped for a faulty SAS-Card. Test 3b told me that the problem should be somewhere else.

Test 3b has the same speed as Test 3a (about 60 MB/s). But as soon as i plug in both sas cards the speed drops to 25MB/s.

That makes it sound as though one of the cards is plugged into a slot that is not fast enough to exploit the card properly!  I assume that you have checked they are plugged into the 4x and 16x slots?  From the product sheet I also see that there are limitations on the combinations of PCI-e slots that can be used.

Yes i made sure, that those cards are plugged in the 16x and 4x slots.

 

That is right but the manual only states, that the PCIx 1x can't be used. The only slots populated are 16x and 4x. Couldn't find anythin on the net about a similar problem.

 

I'll will switch next week to a supermicro X9scm-f mainboard. I already ordered a i3 3220T, supermicro X9scm-f and 2*2 GB RAM. I'll send the newer x4 SAS-Card back to the shop and trade at no additional cost for x8 SAS2LP-MV8. I hope the Mainboardswitch will eliminate my speedproblem. Can't think of anything else...

I'm not sure if this is an issue or not, but wanted to point out that your initial system log shows your second MV8 card negotiating the following in the PCI-E x1 slot:

 

sas: DONE DISCOVERY on port 3, pid:871, result:0

Mar 20 07:09:33 Tower kernel: mvsas 0000:03:00.0: mvsas: driver version 0.8.2

Mar 20 07:09:33 Tower kernel: mvsas 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16

Mar 20 07:09:33 Tower kernel: mvsas 0000:03:00.0: setting latency timer to 64

Mar 20 07:09:33 Tower kernel: mvsas 0000:03:00.0: mvsas: PCI-E x1, Bandwidth Usage: 2.5 Gbps

 

I would guess you are using the onboard graphics option of the board, does this take out the x16 slot for use as an add-on card option?

 

I will point out this note on the motherboard specification page:

(Note 4) When the PCI Express x4 slot (PCIEX4_1) operate at up to x4 mode, the PCIEX1_2 and PCIEX1_3 slots become unavailable.

 

On your new components I would do some research as there have been problems identified with both the MB and card you are wanting to upgrade to and see if you are wiling to live with them.

 

Thanks for pointing it out. I m releaved to know what seems to be wrong.

 

I could live with just 4 GB of RAM. Are there any other limitations/problems?

 

Any other recommondations concerning a 1155 Motherboard or SAS-Card? I could easily switch to IBM M1015, but i would have to flash the card to IT-Mode somehow.

 

 

Not sure if you have seen this thread http://lime-technology.com/forum/index.php?topic=26719.0 but it looks like the new firmware has some positive effects.

Hi guys thx so much for your support. After switching mainboards i have a rebuilding speed of 100 MB/s. I'll do a check disk as suggested after drive rebuild.

 

Its always a nightmare if you have multible problems at once. Motherboard incompatiblity, faulty disk, riserfs faults etc. Thx again.