Hello OMV Community,
Issue: I have an unstable transfer speed when writing a 22Go file to my NAS using SMB protocol. The transfer speed oscillates between 80Mbytes/s (640Mbps) and 112Mbytes/s (896Mbps) as you can see on this screenshot. The issue happens only when writing data to the NAS, not when reading data from the NAS. When reading I get constant 112Mbytes/s.
Image/Screenshot: Unstable transfer speed from Laptop to NAS
Laptop Setup:
- Lenovo T460 - Fresh install of Windows 10 (version: 1909, build: 18363.535) with latest updates. Latest Lenovo website drivers (Bios + Hardware).
- Processor: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2496 Mhz, 2 Core(s), 4 Logical Processor(s)
- Ethernet adapter: Intel(R) Ethernet Connection I219-LM (Driver version: 12.18.9.8)
- Installed Physical Memory (RAM): 8.00 GB
- Storage (OS): SAMSUNG MZ7TY256HDHP-000L7 (238.5 GB)
- Docking Station: Lenovo Thinkpad Pro Dock
NAS Setup:
- OS: OpenMediaVault 5.2.1-1 (Usul) - Fresh install, no modifications, all updates.
- HP Proliant Microserver N54L (N54L)
- Processor: AMD Turion(tm) II Neo N54L Dual-Core Processor (2.2 GHz)
- Ethernet adapter: Broadcom Limited NetXtreme BCM5723 Gigabit Ethernet PCIe (rev 10)
- Storage (OS): SSD 64Gb No brand
- Storage (RAID): RAID 6 - 6 x 2To (7200rpm, Model: Dell MG03ACA200)
- Installed Physical Memory (RAM):
- MemTotal: 5963976 kB
- MemFree: 5015820 kB
- MemAvailable: 5261924 kB
History:
- I originally had OMV 4.x with the same issue, until I found a disk that had a red icon warning for relocated sectors, which I replaced with a another disk.
- Once the array mounted, the transfer speed issue was still there, so I installed OMV 5 (not upgrade) but still got had the issue.
- Then tried reinstalling windows 10 with all drivers/updates with no software tweaks/hacks/modifications, sadly the issue it still there.
- I'm directly connected to the NAS using an CAT6 cable without any switch/router in between (although the issue was the same with a Fortiswitch 348B).
- I tried using the SMB options from the "SMB Tunning" thread but to no avail.
Question: What can I do to pinpoint the issue/bottleneck?
Best regards,
PS: Missing any information that could help?