So after some additional testing it looks like NCQ Trim on the Samsung 8** drives still has "issues".
It looks like it mostly works, but once the drive gets saturated with a large trim *(i.e. deleting 5 kernel trees, and then fstrimming), the kernel starts to hit timeouts. Increasing the timeouts to 200 seconds or more appears to alleviate these errors, but upstream has already blacklisted the drive altogether for NCQ trim. https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a9324d396967 -- 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/1338706 Title: Samsung SSD 840 failed to get NCQ Send/Recv Log Emask 0x1 failed to set xfermode (err_mask=0x40) on upstream kernels >= 3.12 Status in linux package in Ubuntu: Incomplete Bug description: Samsung SSD 840 Series failed to get NCQ Send/Recv Log Emask 0x1. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-30-generic 3.13.0-30.55 ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2 Uname: Linux 3.13.0-30-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 2131 F.... pulseaudio CurrentDesktop: Unity Date: Mon Jul 7 20:01:28 2014 HibernationDevice: RESUME=UUID=685afcb7-7aa6-4048-af15-091d3bcd3b35 InstallationDate: Installed on 2014-06-22 (14 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: System manufacturer System Product Name ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-30-generic root=UUID=d7c2e1cb-d046-460c-83b8-0cfbb330d095 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-30-generic N/A linux-backports-modules-3.13.0-30-generic N/A linux-firmware 1.127.4 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/10/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0901 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: M3N78-EM dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0901:bd09/10/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM3N78-EM:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338706/+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
