** Changed in: linux (Ubuntu) Assignee: Joseph Salisbury (jsalisbury) => (unassigned)
** Changed in: linux (Ubuntu Precise) Assignee: Joseph Salisbury (jsalisbury) => (unassigned) -- 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/1446786 Title: Wrong read balance when a drive is write-mostly Status in linux package in Ubuntu: Incomplete Status in linux source package in Precise: Incomplete Bug description: This bug related to `mdadm` `--write-mostly` option. When we create SSD for read operation, but want to use HDD to mirror SSD content we can create RAID-1 with SSD and 'write-mostly' HDD disk. In Ubuntu kernel there is a bug, which lead to havy read from both SSD and HDD drives. More over if we add HDD as regular disk and SSD as a 'write-mostly' replica most read operations will go to SSD drive (which is clear from sources and we have prove it in our setup). In upstream kernel sources this was already fixed: https://github.com/torvalds/linux/commit/63a7d0a9160421a23baac407847e484e8488d12a Could you backport this functionality? - This patch looks safe to apply as is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1446786/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp