三星pm983测试数据
三星pm983测试数据
硬盘型号 三星 pm983，容量 900G, m2 接口 nvme 协议， pcie 3.0 x4， 规格为 22110。
华硕z690
主板为华硕 z690-p d4, m2 接口 pcie 4.0 x4，受硬盘限制实际为 pcie 3.0 x4。
安装 pve 8.0 系统，6.2 内核。
基本信息
$ lspci | grep SSD
08:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
磁盘数据：
$ fdisk -l
Disk /dev/nvme1n1: 838.36 GiB, 900185481216 bytes, 219771846 sectors
Disk model: MZ1LB960HBJR-000FB
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 131072 bytes / 131072 bytes
Disklabel type: gpt
Disk identifier: 87408245-67E3-47E0-AF90-85B8DDDAD75D
Device Start End Sectors Size Type
/dev/nvme1n1p1 193462528 219771647 26309120 100.4G Linux filesystem
/dev/nvme1n1p2 256 262399 262144 1G EFI System
/dev/nvme1n1p3 262400 193462272 193199873 737G Linux LVM
分区信息：
$ hdparm /dev/nvme1n1p3
/dev/nvme1n1p3:
readonly = 0 (off)
readahead = 512 (on)
geometry = 754687/64/32, sectors = 1545598984, start = 2099200
速度测试
硬盘写入速度：
$ dd if=/dev/zero of=/root/temp/test1.img bs=1G count=10 oflag=dsync
10+0 records in
10+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 14.4349 s, 744 MB/s
只有 744 兆，低的有点出乎意外，应该是缓存耗尽。
硬盘读取速度：
dd if=/root/temp/test1.img of=/dev/null bs=8k
对比
hdparm -tT /dev/nvme1n1p3
/dev/nvme1n1p3:
Timing cached reads: 32260 MB in 2.00 seconds = 16152.14 MB/sec
Timing buffered disk reads: 5074 MB in 3.00 seconds = 1691.16 MB/sec