[Kernel-packages] [Bug 1828351] Re: RAID 10 with MegaRaid controller gives poor write performance

Unsubscribing field-critical and marking as invalid. The main reason of this was that bcache was not tuned automatically. ** Changed in: linux (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to l

[Kernel-packages] [Bug 1828351] Re: RAID 10 with MegaRaid controller gives poor write performance

Subscribing field-critical as it is blocking an ongoing deployment -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1828351 Title: RAID 10 with MegaRaid controller gives poor write perform

[Kernel-packages] [Bug 1828351] [NEW] RAID 10 with MegaRaid controller gives poor write performance

Public bug reported: On a Bionic server (Cisco UCS C240 M5) with a MegaRaid controller (Cisco 12G Modular Raid Controller UCSC-RAID-M5), I can observe very slow writes on the RAID 10 device that was created. A simple test: dd if=/dev/zero of=out bs=1M count=100 Outputs a 35MB/s speed. The RAID