kewtips

Bit embarrassed as this should have been posted in the V6 forum and I found my answer there pretty quickly. Here it is if anyone is looking in the wrong place like I was (I blame tapatalk). http://lime-technology.com/forum/index.php?topic=38719.msg360374#msg360374

hi all, I managed to migrate from v5.05 to v6 over the weekend and everything seems to be working well. I have also liberated a spare Ssd from my main machine. Currently the cache is an old mechanical 5400 rpm drive running on Reiser. I know I can add the ssd and form a cache pool. However this raises some questions. 1. I presume that my best course would be to remove the mechanical drive and use the ssd as a cache. What is the best process to achieve this? 2. If I kept both the ssd and the mech drive, would performance be at the pace of the mechanical drive? 3, Not a big deal. But is there a way to transfer files (eg docker) from the mech drive to the ssd? I have done some searches but nothing that seems to address this situation. Sorry if I have missed anything and thanks in advance.

Hi, I too am experiencing very slow SMB write speeds . Circa 1MB/s with SMB or CIFS. Using AFP gives me 20-30MB/s. I upgraded to 10.9.5 this morning and no improvement. Has anyone got any suggestions for changing the SMB conf file on Unraid to improve performance or any other suggestions? Many thanks,

Ok, the plot thickens. With MC: The old parity drive seems fine- internal copies are at around 30MB/s-not stellar but within parameters. The "faulty" drive copies at around 10MB/s- Can I RMA this? More interesting are network results. Widnows: old parity: windows read 812Mb/s. Write 204Mbps (niiiiice!) faulty drive read 827Mb/s, write 91Mbps (limited by drive speed?) Max OS X 10.4 old parity read 819 Mb/s, write 84Mb/s I think I have two overlapping problems: 1. A poor drive 2. OSX network write weirdness Any pointers again gratefully received.

Thanks everyone. i had already tried swapping the disks between slots. I am currently pre-clearing the Parity disk (3 cycles ) and will see if that drive performs better. If it does, i will RMA the slower disk and use the replacement as parity (the data is backed up elsewhere). J Thanks again for the ideas and help.

OK Using MC to do a 1GB internal transfer from: disk 1 to disk 2-achieves 40-60 MB/s from disk 2 to disk 1 6MB/s It definitely looks like a write problem with the WD red but weird this does not appear in the SMART tests. Can anyone recommend any other diagnostics?

I am writing from my main PC. It is a dual boot Windows/OSX machine. Running tests from windows: disk 1 (WD red 2TB) 9MB/s write, 99MB/s read disk 2 (old seagate driver 500GB) 24MB/s write, 99MB/s read Thanks, J

OK scratch the previous post. Write speeds with Parity off are 1.3MB/s. I think I managed to test one of the internal drives previously. I will order some new cables and see if that makes a difference. Any other ideas gratefully received.

Hi, yes all the drives were pre-cleared including the parity drive (although I understand that this is not strictly necessary). I attach the smart report for the parity drive: Many thanks for your help. NOTE: updated with recent SMART scan. smart_SDA_02.txt

Okay. With parity disabled, write speed becomes 68.6 MB /s. Read 67.5 MB /s. Ok looks like I managed to test an internal drive. See below.

Thanks all. I have just replaced the cables and the switch. This makes no difference to the write speed All the cables are 5e. I will try disabling parity next.

I have just done some tests. Read speed is 57.1 MB/s Write speed 1.3 MB/s

Hi, Back at home now. The system is not modded at all except I did install the BIOS to unlock the full SATA speeds for the top bay-this is not used yet. ATA4 is the 250GB disk that was provided with the server. It is not part of the array. I have replaced the cable between the server and my network.-the speed is still 1-2MB/s. A couple of thoughts. [*]I am using a very old USB drive-but the operations take place in RAM right? [*]I have 2 RAM sticks: 1MB and 4MB and these are not matched Are either of these likely candidates? Thank you

Hi, This is a new build that has been up and running for about 4 weeks. I am pretty certain that the write speeds have been consistently low or at least, since the parity drive was installed 2 weeks ago. Both parity and drive 1 are new 2TB WD Reds. There is a legacy 500GB drive as drive 2 which came out of an old time machine which is scarcely used. The parity check speed was estimated at around 80MB/s-I will get the actual speed when I return home this evening. J

Hi all, I am struggling with write speeds on my N54L running UnRAID basic 5.05 (so no cache drive). Speeds seem to be stuck at 1-2MB/s, I attach the system log. I have also performed SMART checks the disks and I have cycled the network switch. I have also started in safe mode but the performance persists. I have searched the forums and tried the tips but no luck so far. Any thoughts gratefully received. Thank you. syslog.txt