我刚刚安装了 Ubuntu 18.04.2 服务器，它需要一个多小时我已经调查了几个可能的原因，但还没有找到任何确定的原因。
我正在使用新的 ubiquity 安装程序，该安装程序在整个磁盘上都使用guided-lvm。我手动创建了一个交换分区，并在安装完成后将其激活。我在虚拟机上尝试了相同的设置，没有任何问题，所以我认为这不是这些链接中描述的问题：
- https://www.hiroom2.com/2018/05/01/ubuntu-1804-lvm-swap-wait-for-root-en/
- https://tinycp.com/community/show/solved-print-req-error-io-error-dev-fd0-sector-0,43.html
- https://ubuntuforums.org/showthread.php?t=2390618&page=2
systemd-analyze blame 显示：
18.661s apt-daily.service
10.376s systemd-udev-settle.service
10.260s dev-mapper-ubuntu\x2d\x2dvg\x2dsystem\x2d\x2dlv.device
9.639s cloud-init-local.service
9.214s snapd.service
7.875s lxd-containers.service
systemd-analyze 显示：
Startup finished in 1h 2min 5.017s (kernel) + 1min 7.007s (userspace) = 1h 3min 12.024s
POST 之后，正常消息飞过，然后每隔 23 秒我就会收到此消息：
Mar 7 15:02:19 server kernel: [ 81.401001] floppy: error 10 while reading block 0
Mar 7 15:02:19 server kernel: [ 104.223783] print_req_error: I/O error, dev fd0, sector 0
Mar 7 15:02:19 server kernel: [ 104.224975] floppy: error 10 while reading block 0
Mar 7 15:02:19 server kernel: [ 127.323255] print_req_error: I/O error, dev fd0, sector 0
直到 3725 秒，系统最终挂载文件系统：
Mar 7 15:02:19 server kernel: [ 3723.824233] print_req_error: I/O error, dev fd0, sector 0
Mar 7 15:02:19 server kernel: [ 3723.825351] floppy: error 10 while reading block 0
Mar 7 15:02:19 server kernel: [ 3724.161930] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
Mar 7 15:02:19 server kernel: [ 3725.524789] ip_tables: (C) 2000-2006 Netfilter Core Team
如果有帮助的话，该机器是 AM3+ GA-78LMT-S2 上的 AMD FX-4100。当我浏览 BIOS 选项时，我没有看到任何禁用软盘控制器的选项。
为什么我没有将软盘驱动程序列入黑名单？好吧，我有点不愿意尝试，因为运行测试的端到端时间显然是 1 小时。我想在这里问一下，看看在尝试“将所有内容列入黑名单”方法之前我是否能确定根本原因。
编辑更多细节：
server:~$ cat /etc/fstab
#UUID=916718a9-ca19-4694-966a-ae37994cbbb7 none swap sw 0 0
UUID=cb47423b-dfe1-4ccf-8ffc-4e3f408b5b32 / ext4 defaults 0 0
UUID=d13d95e4-f50e-4baf-bb44-491624accb26 /boot ext4 defaults 0 0
UUID=f2508087-1526-4976-9d81-7e35a85461af /mnt ext4 defaults 0 0
server:~$ sudo blkid
[sudo] password for david:
/dev/sda2: UUID="d13d95e4-f50e-4baf-bb44-491624accb26" TYPE="ext4" PARTUUID="1e459a88-de12-41c5-b82f-42a115adb555"
/dev/sda3: UUID="6Jl4Uh-Ztjh-SaiV-D1M7-6Chz-x1IT-GBqmsu" TYPE="LVM2_member" PARTUUID="4c56484e-f74b-4b10-b29a-da6815fef057"
/dev/mapper/ubuntu--vg-system--lv: UUID="cb47423b-dfe1-4ccf-8ffc-4e3f408b5b32" TYPE="ext4"
/dev/loop0: TYPE="squashfs"
/dev/loop1: TYPE="squashfs"
/dev/sda1: PARTUUID="5c6ca6ec-f0a9-47b8-9627-91955a7f3fd3"
/dev/mapper/ubuntu--vg-swap--lv: UUID="916718a9-ca19-4694-966a-ae37994cbbb7" TYPE="swap"
/dev/mapper/ubuntu--vg-data--lv: UUID="f2508087-1526-4976-9d81-7e35a85461af" TYPE="ext4"
server:~$ sudo lshw -C storage
*-storage
description: SATA controller
product: SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 11
bus info: pci@0000:00:11.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: storage pm ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=32
resources: irq:22 ioport:ff00(size=8) ioport:fe00(size=4) ioport:fd00(size=8) ioport:fc00(size=4) ioport:fb00(size=16) memory:fe02f000-fe02f3ff
*-usb
description: Mass storage device
product: Mass Storage Device
vendor: Generic
physical id: 3
bus info: usb@2:3
logical name: scsi1
version: 1.00
serial: 058F63646476
capabilities: usb-2.00 scsi emulated scsi-host
configuration: driver=usb-storage maxpower=250mA speed=480Mbit/s
*-ide
description: IDE interface
product: SB7x0/SB8x0/SB9x0 IDE Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14.1
bus info: pci@0000:00:14.1
version: 00
width: 32 bits
clock: 66MHz
capabilities: ide msi bus_master cap_list
configuration: driver=pata_atiixp latency=32
resources: irq:16 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:fa00(size=16)
*-scsi
physical id: 1
logical name: scsi6
capabilities: emulated
server:~$ sudo lshw -C disk
[sudo] password for david:
*-disk
description: SCSI Disk
product: USB DISK
vendor: SMI
physical id: 0.0.0
bus info: scsi@6:0.0.0
logical name: /dev/sdf
version: 1100
serial: AA00000000016831
size: 3841MiB (4027MB)
capabilities: removable
configuration: ansiversion=4 logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sdf
size: 3841MiB (4027MB)
capabilities: partitioned partitioned:dos
configuration: signature=39f675eb
*-disk:0
description: SCSI Disk
product: SD/MMC
vendor: Generic-
physical id: 0.0.0
bus info: scsi@7:0.0.0
logical name: /dev/sdb
version: 1.00
capabilities: removable
configuration: logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sdb
*-disk:1
description: SCSI Disk
product: Compact Flash
vendor: Generic-
physical id: 0.0.1
bus info: scsi@7:0.0.1
logical name: /dev/sdc
version: 1.01
capabilities: removable
configuration: logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sdc
*-disk:2
description: SCSI Disk
product: SM/xD-Picture
vendor: Generic-
physical id: 0.0.2
bus info: scsi@7:0.0.2
logical name: /dev/sdd
version: 1.02
capabilities: removable
configuration: logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sdd
*-disk:3
description: SCSI Disk
product: MS/MS-Pro
vendor: Generic-
physical id: 0.0.3
bus info: scsi@7:0.0.3
logical name: /dev/sde
version: 1.03
serial: 3
capabilities: removable
configuration: logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sde
*-disk
description: ATA Disk
product: ST3320820AS
vendor: Seagate
physical id: 0.1.0
bus info: scsi@0:0.1.0
logical name: /dev/sda
version: E
serial: 5QF5MB4F
size: 298GiB (320GB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=e4bca90d-e6e1-4ac2-acd3-8f6686bed984 logicalsectorsize=512 sectorsize=512
答案1
我的设置中有些东西导致内核搜索软盘驱动器，因此为了排除这个问题，我添加了一个内核启动参数modprobe.blacklist=floppy，现在系统在约 1 分钟内启动。
我通过运行以下命令使其永久生效：
echo "blacklist floppy" | sudo tee /etc/modprobe.d/blacklist-floppy.conf
sudo update-initramfs -u
谢谢您的诊断帮助。