HiSoC8Y

Its slow because you're getting a ton of errors on your drives. I think the driver keeps resetting the controller card. If this is a hotswap case, you might want to check that you're not exceeding your powersupply capacity. If it's not, maybe you're exceeding the capacity, or your slightly loosened some cabling inside somewhere I saw those errors, I had that issue with my old Dell H200 perc card, it had a maximum capacity of 16 drives. Now, my card is LSI MegaRAID 9240-8i. btw, those errors are showing only when i'm doing a parity check. my PSU is high, and can handle all the 21 drives I have installed (including the parity disk).

I can't run a parity check, it's extremely slow and affecting accessing my array dramatically. attached is my syslog unraid-syslog-12.04.2015.txt

the disk was precleared before inserting it to my system, i precleared on the side on another system. so now, i stopped the parity-check, how come you are sure that i'm still protected? I can see on the webGUI that there are reads/writes on the parity disk, and it says the parity is valid, even though i interrupted the parity-check.

no one replied, and i had to move on. I added the new disk, and the parity check started, and there was the "format" button, and I did, and after the format was completed, the array was still up, and the parity check continued. however, the parity check is extremely slow (2.5 MB/s), causing to hang while accessing my array via network shares. so I stopped the parity check, i guess I'm not protected now. what's the solution?

ok, i had to reboot the unraid with the command "reboot" because the webgui was stuck, and the whole shutdown purpose was to add a new drive. now, it's showing a 'unclean shutdown detected" and if i start the array, it will start the parity check. can i, or should i still add the new disk now?

thanks Bob, but I will stick to preclearing the other drive outside my unRAID box. I will just download the free version of unRAID on a USB, and then use a USB enclosure with the HDD, connect it to my PC, and bypass both the unRAID and the USB to a VM, and do the preclearing there. you think this will work?

I should have sticked to my original plan, to preclear outside my live unRAID array, well, lesson learned!

Can you set the maximum speed when preclearing? I faced an issue when I was preclearing my new 6 TB HDDs, the speed was around 150 MBps, and it cause my live array to be unresponsive.

all drives (the array drives) and the disk i'm preclearing connected to the same controller, which is passsthrued to the unRAID VM.

that's what I mentioned before, All drives connected to a controller..... now i'm stuck at what i described in my previous post (with the updates).... I think I have no choice right now except to wait for the preclear to complete for the drive, and then maybe reboot the system forcefully. no?

I started preclearing the disks, two disks, and it's COMPLETELY killing the performance of my array. I can't even browse to my movies folder as it contains 3000+ folders, it times out even. each preclear is showing a speed of 160 MB/s. So can I now cancel one preclear, hoping that my array performance will improve? what are the consequences of cancelling the preclear? Update 1 I stopped my array via the web, but when I click stop, it's taking time and the page is waiting for response. It's been over 10 minutes now like this. What can I do? I also cancelled the preclear on my second disk, right now, only 1 preclear running. Update 2 The reason I stopped the array because I noticed one of my drives (drive13) had a lot of reads, while i'm sure nothing was accessing the array. Even the disk activity light is still on right now. and, still the web GUI is waiting for response....it's stuck. Seriously, help guys! thanks

One more thing, While its preclwaring the disks, if I disconnect the network card and reconnect it, will it impact/stop the preclear? I need to disconnect the network for some other reason.

Yes. Just run each preclear from different console/telnet sessions. Note if using the console you have up to 6 sessions available on ALT-1 to ALT-6. tried that, didn't work. you sure it's Alt-1?

thanks, one last question before starting the preclear script. I added 2 drives, can i preclear both of them? if so, how?

Just thought of this, my drives are all connected via RAID cards (of course no RAID), and if I follow your method described, will that impact any performance of the unRAID array? or no?

My unRAID is a VM on ESXi, so won't have a problem and wouldn't need any packs. thanks though!

An additional drive. But when it pre-clears, the whole array is down, and last time it took over 15 hours. Can't I just pre-clear it on a separate system, not the unRAID system? You could, but why not do it on the unRAID system using the script describe in this thread? That is what most of us do if we have the free SATA port on the unRAID system. Using the pre-clear script rather than letting unRAID do it means the pre-clear happens on the unRAID system with the array still running. Only when the pre-clear completes successfully do you stop the array for the minute or so it takes to add it to the array. This approach also has the advantage that as you are testing the drive 'in-situ' there is less chance of disturbing cables at the last moment when you add the drive. A final point about the script is that it also carries out confidence checks on the drive - something the unRAID built-in pre-clear does not. If you are going to use a telnet session (rather than the unRAID console) to run the pre-clear script mentioned above then you might want to look into using 'screen' to control the pre-clear. If you do not then closing the telnet window aborts the pre-clear and since on a large drive pre-clear can run for days this is a real danger. At some point I think it is likely that unRAID v6 will include an equivalent to the above pre-clear script as standard, but it has not happened yet and the free-standing script is still the recommended way to do it. Ok, i get it now. So you mean, insert the disk, but don't add it to the array, and start the array and use the system as usual, and on the side, you do the pre-clear on the unraid system itself, with the new disk which is not part of the array. am i correct?

An additional drive. But when it pre-clears, the whole array is down, and last time it took over 15 hours. Can't I just pre-clear it on a separate system, not the unRAID system?

Ok So last time I added a new disk to my array, I had to stop my array which caused a downtime for a long time until the drive was pre-cleared and then the array came online. I want to avoid this long downtime. Theoretically, I have a windows PC and have an external drive case that I can insert the new disk to, and want to pre-clear it, then add it to my unRAID array (which can take few minutes only), which will be fast. so is this possible? if yes, how?

I agree

What are the ranges of low, medium and high for CPU temperature? What range is safe? is 50 C for CPU high, low? attached is my stats, am i good?

Hi All, I recently bought two HDDs, WD 6 TB WD60EFRX. I'm starting this forum to post my experience with the drive. I'm running unRAID 5.0.5 I used one of the drives for my parity, and the other as one of the data drives in the array. Test #1 (Writing data directly by access the drive...e.g. \\myserver\drive10) ----- Writing speed is around 40-48 MBps I'll update my post whenever I'm doing any other tests.

Weird, mine completed in 23 hours, all those 3 drives I mentioned

Ok, i added three new drives, 2TB, 3TB and 6TB. They are clearing first, and i'm nonitoring it, it's clearing at a rate of 1% every 10 minutes. is this acceptable?

Just an update, I read somewhere that i flash it without the ROM file, and i reflashed my card again without it. Now, I don't get the option for the BIOS of the card when the server boots. But what I did, i connected all the hard drives via the new card and the Intel extender, and my unRAID VM read all the drives as they were before, even the assignment to the slots are correct. Before i put my server into production, i want to be sure that it's ok and nothing is wrong. Update I brought the array up, and all was ok, and i tested spin up and down, and it worked. anything else i should test?