Tu peux aussi désactiver tout ce qui a trait a lvm si tu n'est pas en lvm.
Pour info voici ce que j'ai :
[dominique@host-192-168-1-2 ~]$ systemd-analyze blame|awk '{print $0;sum=sum+$1} END {print NR,"services: Total =",sum/1000,"seconds"}'
858ms akmods.service
340ms vboxdrv.service
300ms systemd-tmpfiles-setup.service
176ms systemd-fsck@dev-disk-by\x2duuid-d6ac0272\x2d538f\x2d4270\x2db104\x2d6041eb438871.service
148ms accounts-daemon.service
132ms systemd-backlight@backlight:acpi_video0.service
129ms systemd-fsck@dev-disk-by\x2duuid-22c530ab\x2db83f\x2d4d9b\x2d9cc4\x2dfce609a547eb.service
129ms rtkit-daemon.service
126ms rsyslog.service
124ms NetworkManager.service
88ms avahi-daemon.service
85ms systemd-vconsole-setup.service
69ms lm_sensors.service
51ms udisks2.service
49ms systemd-binfmt.service
41ms systemd-udev-trigger.service
41ms systemd-fsck-root.service
31ms mcelog.service
30ms colord.service
28ms chronyd.service
27ms systemd-logind.service
25ms user@1000.service
24ms upower.service
24ms polkit.service
23ms dev-mqueue.mount
22ms sys-kernel-debug.mount
21ms dev-hugepages.mount
20ms tmp.mount
20ms systemd-readahead-replay.service
19ms systemd-readahead-collect.service
19ms proc-sys-fs-binfmt_misc.mount
19ms systemd-tmpfiles-setup-dev.service
16ms dev-disk-by\x2duuid-b70abe30\x2d94cc\x2d4886\x2da85b\x2dc1418d7f02b5.swap
16ms vboxballoonctrl-service.service
15ms vboxweb-service.service
13ms vboxautostart-service.service
10ms systemd-user-sessions.service
8ms kmod-static-nodes.service
7ms boot.mount
6ms home.mount
4ms systemd-update-utmp-runlevel.service
4ms systemd-sysctl.service
3ms systemd-journal-flush.service
3ms systemd-udevd.service
3ms auditd.service
3ms systemd-remount-fs.service
3ms systemd-update-utmp.service
2ms systemd-readahead-done.service
2ms systemd-random-seed.service
2ms sys-kernel-config.mount
50 services: Total = 3.358 seconds
comme tu peux le constater je n'ai que 50 services de lancé, et ma Fedora 20 fonctionne sans soucis.