Nov845 Posted July 13, 2022 Share Posted July 13, 2022 I was getting drive errors. So I replaced the bad drive, but I'm still getting extremely slow parity sync speeds (around 1mb/sec). I can't figure out why it's so slow. nas-diagnostics-20220713-1302.zip Quote Link to comment
trurl Posted July 13, 2022 Share Posted July 13, 2022 Just now, Nov845 said: replaced the bad drive How do you know the drive was bad? Bad connections are much more common than bad drives. Quote Link to comment
Nov845 Posted July 13, 2022 Author Share Posted July 13, 2022 1 minute ago, trurl said: How do you know the drive was bad? Bad connections are much more common than bad drives. It was getting tens of thousands of errors in the Error column on the Main page. Quote Link to comment
JorgeB Posted July 13, 2022 Share Posted July 13, 2022 Two controllers have (or are connected to) SATA port multipliers, that's very bad for performance and reliability, lots of ATA errors on the log. Quote Link to comment
trurl Posted July 13, 2022 Share Posted July 13, 2022 2 minutes ago, trurl said: Bad connections are much more common than bad drives. In fact it looks like connection problems on multiple disks, probably controller. 04:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] (rev 11) Subsystem: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] Kernel driver in use: ahci Kernel modules: ahci 06:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] (rev 11) Subsystem: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] Kernel driver in use: ahci Kernel modules: ahci Marvell controllers are NOT recommended Quote Link to comment
Nov845 Posted July 13, 2022 Author Share Posted July 13, 2022 10 minutes ago, trurl said: In fact it looks like connection problems on multiple disks, probably controller. 04:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] (rev 11) Subsystem: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] Kernel driver in use: ahci Kernel modules: ahci 06:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] (rev 11) Subsystem: Marvell Technology Group Ltd. 88SE9215 PCIe 2.0 x1 4-port SATA 6 Gb/s Controller [1b4b:9215] Kernel driver in use: ahci Kernel modules: ahci Marvell controllers are NOT recommended What controller do you recommend? Quote Link to comment
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