May 20, 20242 yr I just set up a new unraid install and I'm getting really slow write speeds. On my old setup I had 5x4TB data disks and 2x4TB parity drives and always get 112MB/s when transferring speeds as excepted. On my new setup I have 2x12TB data disks and 2x12TB parity drives and I get 22MB/s write speeds. My read speeds are 112MB/s so those are fine it's just the write speeds that are an issue. I put the "md_write_method" on "reconstruct write" as a test and then I get the normal speeds for a second or two, after this it drops down to 22MB/s again. Any help with this would be appreciated.
May 21, 20242 yr Community Expert Nothing obvious in the diags that I can see, it can be a slow disk, post a screenshot of the Windows explorer transfer graph, with reconstruct write enabled, and the results of the diskspeed docker test, the controller test.
May 21, 20242 yr Community Expert What is the file mix--- Large size files (>5GB) or thousands of small files (<1MB)?
May 22, 20242 yr Author On 5/21/2024 at 5:05 PM, JorgeB said: Nothing obvious in the diags that I can see, it can be a slow disk, post a screenshot of the Windows explorer transfer graph, with reconstruct write enabled, and the results of the diskspeed docker test, the controller test. I tried installing the diskspeed docker but this failed, after this I noticed my two parity disks were disabled as well. The whole environment was also very slow and just not working right so I decided to just start fresh, format my USB and install Unraid on it again. But now I have a new issue in that I can't access it anymore. When I boot the first time it gives me the login prompt but when I go to the IP I get a connection refused error, the same when I try over SSH. After starting the GUI mode via the console the webpage also does not load there. I tried giving it a fixed IP and after rebooting it won't start anymore and gives the following error: [sda] Attached SCSI removable disk not found - press ENTER key to reboot. When I recreate the USB again I get the same issues every time. Maybe for some context: this Unraid instance is running as a virtual machine on Proxmox. The USB is passed trough to the VM as well as the PCIE adapter of a QNAP TL-D800S to access my drives.
May 22, 20242 yr Author On 5/21/2024 at 5:12 PM, Frank1940 said: What is the file mix--- Large size files (>5GB) or thousands of small files (<1MB)? It was one large ISO file I was testing with.
May 23, 20242 yr Community Expert 10 hours ago, Nusu said: When I recreate the USB again I get the same issues every time. Note that virtualizing Unraid is not supported, but please post the diagnostics after booting with a new stock install using DHCP.
May 23, 20242 yr Author 1 hour ago, JorgeB said: Note that virtualizing Unraid is not supported, but please post the diagnostics after booting with a new stock install using DHCP. I created a new USB with the stock install, here is the diagnostics zip. After running the diagnostics command I rebooted it without changing anything to see what would happen and I get the "Attached SCSI removable disk not found" error again. So it seems I can only boot it once and then it stops working and I need to create a new USB again. tower-diagnostics-20240523-0134.zip
May 23, 20242 yr Community Expert May 23 01:33:23 Tower emhttpd: Unregistered Flash device error (ENOFLASH3) Unraid is not detecting the flash drive, so likely related to that error you see and virtualization, you can try asking for help here: https://forums.unraid.net/forum/46-virtualizing-unraid/
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