I've found out that all my drives uses CFQ scheduler by default, since that udev rule (60-ssd-scheduler.rules) that says use CFQ for rotating disk is useless. I belive that Ubuntu uses Deadline scheduler by default, but for somewhat reason it's not that on my system.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: udev 229-4ubuntu21
ProcVersionSignature: Ubuntu 4.10.0-40.44~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-40-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.13
Architecture: amd64
CurrentDesktop: KDE
CustomUdevRuleFiles: 60-vboxdrv.rules 60-ssd-scheduler.rules
Date: Thu Dec 7 03:11:16 2017
InstallationDate: Installed on 2014-11-26 (1106 days ago)
InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-40-generic root=UUID=33a02342-70da-4f8d-9868-2f8e7330ec90 ro
SourcePackage: systemd
UpgradeStatus: Upgraded to xenial on 2016-07-28 (496 days ago)
dmi.bios.date: 09/12/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3901
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8H67-M
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.:bvr3901:bd09/12/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H67-M:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
please reopen if this is still an issue