temkins

Well, I just tried. I created a share which should use the questionable drive exclusively and tried to write a file to it, Right after that i got Unraid crashed - here is a screenshot of the kernel panic. I have no idea what's happening, the unraid setup is quite mint, I had just 2 dockers running at the moment (Heimdall and Cloudflaredydns).

I need the advice what to do with this drive. Model/ID: ST6000DM003-2CY186_ZR10CJF8. I don't remember when exactly I got it, but should be no older than 2 years, used very moderately. This was a data drive in a newly created array (4x 6TB, with 1 parity), all attached through the "Serial Attached SCSI controller: Broadcom / LSI SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)." (as listed in devices) During the initial parity build it reported a huge number of errors. I assumed it was due to a loose SATA cable, checked/tightened all cables carefully. Upon trying to write to this drive's share, Unraid disabled it. I recreated the array, checked cables again - still the same result, the drive is being disabled after any write attempt. Quick SMART test gives no errors. SMART is attached. I removed the drive from the array for now. What should I do next? Should I just trash it or what? ST6000DM003-2CY186_ZR10CJF8-20210427-1218.txt

Thanks! I have already changed it to 40 before, and now changed to 70 (I have 64 Gb of RAM on server with just a couple of dockers running). Copying a single file from Unraid to client is now solid 1 - 1.1 Gbps, writing the same file back to Unraid is still around 550-600 mbps. However, with some bundle files (such as fcpbundle packages) both writes and reads are quite puzzling. I made a quick screen capture to illustrate the case. Please note that write and read are sequential, nothing is running on background, no network or server load. In short - copying to client starts fast, but stalls at around 95%, Writing back to unraid starts very slow, but later speeds up. Is it an anomaly or something to be expected? copy test.mp4

OK, a quick update. I replaced QVO with EVO, now having a cache pool of 4 x Samsung 850 EVO 1TB, in RAID0. Clearly an overkill for Unraid. With my 10G network the best file transfer speed I'm getting is 600-650 on writes, and up to 700 on reads for large single files (like pro-res videos) and around 350-400 for package libraries (which are literally folders with few thousands of small files inside). Based on the post below I assume this is maximum I could get without setting up a direct access to cache drive. Bypassing the share is rather sophisticated and perhaps doesn't worth the risk in my case. Besides, as my main client is M1 Mac with Big Sur (well known for very weird SMB performance), I assume I should be happy with my latest results.

Thanks so much! You are right, that might be the problem. I'll try to replace QVOs and see if any difference.

Hello community! Please share your wisdom, again! :) I really need some advice on making the optimal cache pool. I have a 10G LAN between my Unraid and my Mac workstation (huge thanks to SpaceinvaderOne for amazing videos!) Now I would like to capitalize on my new 10G connection speed. I have 4 SSD SATA drives available: 2 x Samsung 870 QVA, 2TB 2 x Samsung 850 EVO 1TB. I placed all 4 into a cash pool (obviously btrf) as RAID0. Then I created a share exclusively for that cache pool (with "use cache pool" set to "only") and mounted that share on my Mac. Now, when I'm writing/reading from that share on my Mac via 10G, I'm only getting around 350-400mb/s, which is, to my mind, is a single drive performance, while I have 4 iof them in RAID0! I'm not expecting 4x speed since drives are of different sizes, but 2x is something I was hoping to see. It is also worth noting that connecting to "domains" share (which is, in my case, a cache pool of 2 NVMEs) I'm getting a read/write speed of about 750-800 mb/s, which is fine with me. After this long introduction, my question is about btrfs RAID 0 implementation - should I put all 4 into a single raid0, or this is in fact counterproductive? If so, how should I setup my 4 available SSD drives to make sure my Mac could use them at full 10G speed? Many thanks!

Thanks for those hints! So I figured out, that I had a couple of HUGE Final Cut libraries on my drives (my Unraid is a file server/archive). On MacOS this is a single file, while Unraid sees it as a folder with nearly 1 million of tiny files. Those fcpbundle files were causing the major copying slow down, while single files are copied in line with USB->HDD expected speeds - just as you described above.

I'm using my Unraid (8x8Tb + 1 parity) as a file server (lets say, Share 1) and also as a Plex machine for a few users (aka Share 2). Both shares are currently set as high-water, no specific drives selected. Now, when I have files being moved in or out of Share 1, my Plex server on Share 2 is having troubles with playback. It seems like drives are not able to deliver the stream, video playback is caching. Once the file move on Share 1 is on hold, Plex has no issues at all and could easily deliver a few direct streams. So here comes the question: I want to specify some dedicated drives for Plex only, and keep file server on other drives. If I change my share setting to use specific drives now, will it move existing files automatically to those specific drives, or I have to do that manually?

Oh, got that. I already created a share, so my “drive-name” are actually directories under that share. Thanks for clarifying that. Still puzzled with speed. Is there any way to see if there is a hardware issues with my usb ports? Or does that speed is ok for hfs+ to unraid transfer?

So does it mean that there is a better, non-confusing way to move a large amount of files to the share? Except for using windows, mounting that share as the shared drive a copying everything via network?

Hi there! I've got a couple of questions about the file copying speed, need to know if my situation is normal or should I investigate further? I need to copy multiple external USB HDD to my Unraid server. Each drive is 4Tb with over 100k files (large or small). I'm hooking these USB drives directly to Unraid through the USB 3 port and using the Midnight Commander to copy files from mounted unassigned drive (/mnt/disks/drive_name) to (mnt/user0/share_name/disk_name) My unraid is running with GUI on and monitor hooked, so that I could keep the MC open and see how it goes. Since I'm totally new to unraid (and to linux in general), I've got a few questions and hope you guys could help me: 1. The speed of file transfer from the external USB drive (Lacie RAID 0, HFS+) to unraid share is 20 MB/s, sometimes drops to as low as 3 MB/s, sometimes goes up to 40-50 MB/s. I believe that both unraid and external drives can do much faster through the USB 3. What should I check? 2. Is it ok to copy files the way I do -- from "/mnt/disks/drive_name" to "mnt/user0/share_name/disk_name". I'm using "user0" as I don't need those files on my cache drive. I tried using the Krusader docker, but have a weird feeling that it copies even slower. Would appreciate any suggestions.