mount - How to fix slow boot issue in RAID? - Ask Ubuntu
i switched hardware raid1 , noticed significant boot time increase. see yourselves sample dmesg output:
... [ 2.316879] dell_wmi: detected dell wmi interface version 1 [ 2.316928] input: dell wmi hotkeys /devices/virtual/input/input8 [ 2.329702] input: hda intel pch headphone mic /devices/pci0000:00/0000:00:1f.3/sound/card0/input9 [ 2.329755] input: hda intel pch line out /devices/pci0000:00/0000:00:1f.3/sound/card0/input10 [ 2.332544] nvidia-uvm: loaded uvm driver in 8 mode, major device number 241 [ 2.527704] ext4-fs (dm-2): mounted filesystem ordered data mode. opts: (null) [ 2.606030] audit: type=1400 audit(1477798402.176:2): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine" pid=978 comm="apparmor_parser" [ 2.606034] audit: type=1400 audit(1477798402.176:3): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=978 comm="apparmor_parser" [ 2.606909] audit: type=1400 audit(1477798402.176:4): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session" pid=972 comm="apparmor_parser" [ 2.606913] audit: type=1400 audit(1477798402.176:5): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session//chromium" pid=972 comm="apparmor_parser" [ 2.607887] audit: type=1400 audit(1477798402.176:6): apparmor="status" operation="profile_load" profile="unconfined" name="/sbin/dhclient" pid=973 comm="apparmor_parser" [ 2.607891] audit: type=1400 audit(1477798402.176:7): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/networkmanager/nm-dhcp-client.action" pid=973 comm="apparmor_parser" [ 2.607895] audit: type=1400 audit(1477798402.176:8): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/networkmanager/nm-dhcp-helper" pid=973 comm="apparmor_parser" [ 2.607898] audit: type=1400 audit(1477798402.176:9): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=973 comm="apparmor_parser" [ 2.608931] audit: type=1400 audit(1477798402.180:10): apparmor="status" operation="profile_load" profile="unconfined" name="/usr/sbin/cups-browsed" pid=981 comm="apparmor_parser" [ 2.791921] clocksource: switched clocksource tsc [ 2.995463] nvrm: system not configured drive vga console [ 2.995464] nvrm: on primary vga device. nvidia linux graphics driver [ 2.995464] nvrm: requires use of text-mode vga console. use of other console [ 2.995465] nvrm: drivers including, not limited to, vesafb, may result in [ 2.995465] nvrm: corruption , stability problems, , not supported. [ 3.118394] input: hda nvidia hdmi/dp,pcm=3 /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input11 [ 3.118480] input: hda nvidia hdmi/dp,pcm=7 /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input12 [ 3.118560] input: hda nvidia hdmi/dp,pcm=8 /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input13 [ 3.118625] input: hda nvidia hdmi/dp,pcm=9 /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input14 [ 92.261466] audit_printk_skb: 60 callbacks suppressed [ 92.261467] audit: type=1400 audit(1477798491.830:31): apparmor="denied" operation="open" profile="/usr/sbin/cupsd" name="/etc/ld.so.preload" pid=1140 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 92.262088] cgroup: new mount options not match existing superblock, ignored [ 92.331553] audit: type=1400 audit(1477798491.898:32): apparmor="denied" operation="open" profile="/usr/sbin/cups-browsed" name="/etc/ld.so.preload" pid=1224 comm="cups-browsed" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 ... i suspecting bad uuids in /etc/fstab, please, look, uncommented swap necessary things included:
~$ sudo blkid /dev/sda: type="isw_raid_member" /dev/sdb: type="isw_raid_member" /dev/sdc1: uuid="8c6a54af-7820-4590-851d-d11bcb06f642" type="crypto_luks" partuuid="1a92ebcc-01" /dev/sdc2: uuid="9660a50c-cd39-4366-85c4-b4f0485914c5" type="swap" partuuid="1a92ebcc-02" /dev/mapper/isw_deehbehggj_towervolume1: uuid="04e2666d-4dbf-47d9-87ae-84cc06914d32" type="ext4" pttype="dos" partuuid="074e8ddc-01" /dev/mapper/isw_deehbehggj_towervolume2: uuid="e17a84b2-3f2a-471f-a928-d7a265993e1e" type="ext4" partuuid="074e8ddc-02" /dev/mapper/isw_deehbehggj_towervolume: ptuuid="074e8ddc" pttype="dos" and @ /etc/fstab
~$ cat /etc/fstab # /etc/fstab: static file system information. # # use 'blkid' print universally unique identifier # device; may used uuid= more robust way name devices # works if disks added , removed. see fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / on /dev/sda1 during installation uuid=04e2666d-4dbf-47d9-87ae-84cc06914d32 / ext4 errors=remount-ro 0 1 # /home on /dev/sda6 during installation uuid=e17a84b2-3f2a-471f-a928-d7a265993e1e /home ext4 defaults 0 2 # swap on /dev/sdc during installation #uuid=9660a50c-cd39-4366-85c4-b4f0485914c5 none swap sw 0 0 i these uuids match, why getting
[ 92.262088] cgroup: new mount options not match existing superblock, ignored ?
p.s.
/dev/sda 256gb ssd (adata ssd s559)
/dev/sdb 256gb ssd (liteon cv3-ce256)
sda , sdb set in raid1
/dev/sdc 1tb hdd thats divided encrypted drive(/dev/sdc1) , 8gb swap (/dev/sdc2)
/dev/mapper/isw_deehbehggj_towervolume raid1 volume representation
raid info:
~$ lspci -vv | grep -i raid 00:17.0 raid bus controller: intel corporation sata controller [raid mode] (rev 31) subsystem: dell sata controller [raid mode] here proof no software raid being used:
~$ cat /proc/mdstat personalities : unused devices: <none> running ubuntu 16.10
here systemd-analyze blame output, see nothing strange
~$ systemd-analyze blame 9.609s networkmanager-wait-online.service 5.074s nmbd.service 3.817s apt-daily.service 2.078s upower.service 1.209s vmware.service 904ms user@1000.service 545ms vmware-workstation-server.service 414ms systemd-timesyncd.service 348ms dev-mapper-isw_deehbehggj_towervolume1.device 289ms click-system-hooks.service 282ms snapd.firstboot.service 240ms networking.service 131ms networkmanager.service 110ms modemmanager.service 107ms smbd.service 102ms accounts-daemon.service 101ms systemd-resolved.service 97ms keyboard-setup.service 92ms udisks2.service 87ms apparmor.service 82ms vmware-usbarbitrator.service 82ms bluetooth.service 78ms teamviewerd.service 54ms thermald.service 45ms gpu-manager.service 45ms pppd-dns.service 43ms rsyslog.service 42ms systemd-udev-trigger.service 41ms systemd-fsck@dev-disk-by\x2duuid-e17a84b2\x2d3f2a\x2d471f\x2da928\x2dd7a265993e1e.service 38ms systemd-tmpfiles-setup-dev.service 37ms irqbalance.service 36ms grub-common.service 34ms lightdm.service 34ms systemd-tmpfiles-setup.service 30ms polkitd.service 26ms systemd-udevd.service 23ms systemd-tmpfiles-clean.service 22ms colord.service 19ms apport.service 18ms avahi-daemon.service 18ms packagekit.service 16ms systemd-journald.service 16ms systemd-modules-load.service 16ms ssh.service 16ms speech-dispatcher.service 15ms plymouth-read-write.service 15ms rc-local.service 14ms systemd-logind.service 14ms alsa-restore.service 12ms plymouth-start.service 10ms sys-kernel-debug.mount 10ms binfmt-support.service 10ms dev-hugepages.mount 10ms systemd-remount-fs.service 9ms dev-mqueue.mount 8ms ureadahead-stop.service 7ms home.mount 7ms snapd.boot-ok.service 6ms dns-clean.service 6ms systemd-sysctl.service 5ms console-setup.service and ~$ systemd-analyze plot output
for playing raid or otherwise reformatting disks, not forget following:
check both /etc/fstab and /etc/crypttab files.
for me /etc/crypttab had line specifying nonexisting encrypted swap volume. after removing, boot in under 15secs.
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