在全新安装的 Proxmox 8.1 上，fdisk -l 警告“分区 3 未从物理扇区边界开始”。这对我来说是意料之外的，因为分区的起始位置是 2099200，可以被 8 整除（4096/512）。
我担心这会影响性能和 SSD 寿命。
系统信息：
操作系统：Proxmox 8.1（Debian 12.5）
硬件：MegaRAID 12GSAS/PCIe Secure SAS39xx，RAID 5 中的 4 个磁盘
lshw 类磁盘类存储
*-raid
description: RAID bus controller
product: MegaRAID 12GSAS/PCIe Secure SAS39xx
vendor: Broadcom / LSI
physical id: 0
bus info: pci@0000:81:00.0
logical name: scsi0
logical name: /dev/fb0
version: 00
width: 64 bits
clock: 33MHz
capabilities: raid pm msi pciexpress msix bus_master cap_list rom fb
configuration: depth=32 driver=megaraid_sas latency=0 mode=1024x768 visual=truecolor xres=1024 yres=768
resources: iomemory:2000-1fff iomemory:2000-1fff irq:51 memory:20020f00000-20020ffffff memory:20020e00000-20020efffff memory:f2100000-f21fffff ioport:b000(size=256) memory:f2000000-f20fffff
*-disk
description: SCSI Disk
product: MR9560-8i
vendor: BROADCOM
physical id: 3.6f.0
bus info: scsi@0:3.111.0
logical name: /dev/sda
version: 5.27
serial: 00cd0054e9b972052d000a6910b26200
size: 2681GiB (2878GB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=efea2081-a6ca-4151-ae8b-d5cc971ce290 logicalsectorsize=512 sectorsize=4096
fdisk -x
Disk /dev/sda: 2.62 TiB, 2878970265600 bytes, 5622988800 sectors
Disk model: MR9560-8i
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disklabel type: gpt
Disk identifier: EFEA2081-A6CA-4151-AE8B-D5CC971CE290
First usable LBA: 34
Last usable LBA: 5622988766
Alternative LBA: 5622988799
Partition entries starting LBA: 2
Allocated partition entries: 128
Partition entries ending LBA: 33
Device Start End Sectors Type-UUID UUID Name Attrs
/dev/sda1 34 2047 2014 21686148-6449-6E6F-744E-656564454649 7E31886C-4D4F-43A7-8F53-81BA700F4394
/dev/sda2 2048 2099199 2097152 C12A7328-F81F-11D2-BA4B-00A0C93EC93B 40656EBB-ABAE-4A26-BBA4-3D18CDAD8D80
/dev/sda3 2099200 5622988766 5620889567 E6D6D379-F507-44C2-A23C-238F2A3DF928 33753DAF-6729-4730-8237-318CED86E220
Partition 1 does not start on physical sector boundary.
Disk /dev/mapper/pve-swap: 4 GiB, 4294967296 bytes, 8388608 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disk /dev/mapper/pve-root: 20 GiB, 21474836480 bytes, 41943040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disk /dev/mapper/pve-data: 59.99 GiB, 64416120832 bytes, 125812736 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 262144 bytes / 786432 bytes
Disk /dev/mapper/pve-vm--1001--disk--0: 300 GiB, 322122547200 bytes, 629145600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 2097152 bytes
Disklabel type: dos
Disk identifier: 0x8b7a7123
Device Boot Start End Sectors Id Type Start-C/H/S End-C/H/S Attrs
/dev/mapper/pve-vm--1001--disk--0-part1 * 2048 1953791 1951744 83 Linu 4/4/1 1023/254/2 80
/dev/mapper/pve-vm--1001--disk--0-part2 1953792 3907583 1953792 82 Linu 1023/254/2 1023/254/2
/dev/mapper/pve-vm--1001--disk--0-part3 3909630 602861567 598951938 5 Exte 1023/254/2 1023/254/2
/dev/mapper/pve-vm--1001--disk--0-part5 3909632 101564415 97654784 83 Linu 1023/254/2 1023/254/2
/dev/mapper/pve-vm--1001--disk--0-part6 101566464 103518207 1951744 83 Linu 1023/254/2 1023/254/2
/dev/mapper/pve-vm--1001--disk--0-part7 103520256 602861567 499341312 83 Linu 1023/254/2 1023/254/2
Partition 3 does not start on physical sector boundary.
答案1
该错误Partition 3 does not start on physical sector boundary与设备有关/dev/mapper/pve-vm--1001--disk--0，而不是/dev/sda像您的陈述2099200所暗示的那样是分区的开始。
事实上，分区 3 的/dev/mapper/pve-vm--1001--disk--0起始扇区不能被 512 完全整除（3909630/512=7635.99609375）。
对于磁盘，/dev/sda您会得到有关分区 1 的相同错误，该分区也没有在扇区边界上对齐。