Hey everyone! I'm having some issues with my Buffalo TeraStation, which I primarily use for archiving backups. No matter how much I test it, I can't get the write speeds to exceed 200Mbps—it's consistently around 150Mbps across various devices. On the flip side, the read speeds are blazing fast, hitting over 750Mbps. I even tested this from a Windows Server with SSDs and dedicated hardware RAID, but the results are still the same. Other test servers write at over 600Mbps and read at 800Mbps, all while connected through the same switch and using RAID 5. I'm starting to wonder if this is a RAID or drive configuration issue. Should I just swap the drives into an older server for better speeds? Here are the specs: I'm using a WS5420RN9 running Windows Server IoT 2019 for Storage, and the drives are Seagate IronWolf 8TB NAS HDDs, 7200 RPM with 256MB Cache.
3 Answers
You might want to rethink using RAID-5, especially since you've got large drives. With three 8TB drives, there's a high chance of encountering unrecoverable errors during a rebuild, which could be risky. If you're looking for safer options for long-term storage, RAID-10 could be a better fit, balancing performance and redundancy. But yeah, those write speeds being so low is surprising—definitely consider a setup that has more RAM and proper RAID handling!
I think it's all about the drive performance with spinning disks. If you want better write speeds, consider using multiple smaller 2.5" drives, as those can run at much higher RPMs compared to your 3.5" drives. It's all about maximizing the hardware you have. And since your TeraStation has a 10GbE NIC, switching to it might boost performance too. Just a thought!
It sounds like your setup with RAID-5 might be causing the slow write speeds. Without a dedicated hardware XOR engine, RAID-5 can really bog down write performance, plus the Server IoT edition could be set up in a way that's not optimizing speed. I'd check if it's using Dynamic Disk or Parity Storage Spaces, as those configurations can hurt performance significantly. You might want to consider switching RAID types or getting a dedicated RAID controller for better throughput.
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