我刚刚安装了一台 HP z230 Xeon E3 1225 v3 机器，它配备了 HP TurboDrive G1 和 Seagate Firecuda NVMe SSD。我原本预计读取速度为 2-3000MB/s，但实际速度却远低于这个数字。我并不太在意这里或那里的几百MB/s，但我看到的是 300-400MB/s，这让我觉得有些配置有误。
$ uname -ra
Linux host 5.4.0-74-generic #83-Ubuntu SMP Sat May 8 02:35:39 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal
简单分区方案，无加密
Disk /dev/nvme0n1: 931.53 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: Seagate FireCuda 510 SSD ZP1000GM30031
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 521B5816-364D-4D9B-B9B5-5F7C17E272C9
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 1953521663 1953519616 931.5G Linux filesystem
hdparm 显示出比预期低近一个数量级：
$ hdparm -tT --direct /dev/nvme0n1
/dev/nvme0n1:
Timing O_DIRECT cached reads: 722 MB in 2.00 seconds = 360.94 MB/sec
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing O_DIRECT disk reads: 1098 MB in 3.00 seconds = 365.60 MB/sec
使用 grub 设置：
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset nvme_core.default_ps_max_latency_us=200 scsi_mod.use_blk_mq=1"
调度器
$ cat /sys/block/nvme0n1/queue/scheduler
[none] mq-deadline
fstab：
/dev/disk/by-uuid/26ccd344-b8f1-4101-af69-6571bb600a87 / ext4 defaults,noatime,nodiratime 0 0
智能控制：
smartctl --all /dev/nvme0n1
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-74-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Number: Seagate FireCuda 510 SSD ZP1000GM30031
Serial Number: 7W1004GW
Firmware Version: STPSC014
PCI Vendor/Subsystem ID: 0x1bb1
IEEE OUI Identifier: 0x6479a7
Total NVM Capacity: 1,000,204,886,016 [1.00 TB]
Unallocated NVM Capacity: 0
Controller ID: 1
Number of Namespaces: 1
Namespace 1 Size/Capacity: 1,000,204,886,016 [1.00 TB]
Namespace 1 Formatted LBA Size: 512
Namespace 1 IEEE EUI-64: 6479a7 486f001b5c
Local Time is: Mon Jun 14 20:17:02 2021 UTC
Firmware Updates (0x1e): 7 Slots, no Reset required
Optional Admin Commands (0x0017): Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005d): Comp DS_Mngmt Wr_Zero Sav/Sel_Feat Timestmp
Maximum Data Transfer Size: 512 Pages
Warning Comp. Temp. Threshold: 75 Celsius
Critical Comp. Temp. Threshold: 80 Celsius
Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
0 + 9.48W - - 0 0 0 0 0 0
1 + 6.45W - - 1 1 1 1 0 0
2 + 4.93W - - 2 2 2 2 0 0
3 - 0.0490W - - 3 3 3 3 2000 2000
4 - 0.0018W - - 4 4 4 4 25000 25000
Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
0 + 512 0 2
1 - 4096 0 1
=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
SMART/Health Information (NVMe Log 0x02)
Critical Warning: 0x00
Temperature: 35 Celsius
Available Spare: 100%
Available Spare Threshold: 5%
Percentage Used: 0%
Data Units Read: 206,765 [105 GB]
Data Units Written: 209,598 [107 GB]
Host Read Commands: 14,114,924
Host Write Commands: 11,352,976
Controller Busy Time: 11
Power Cycles: 25
Power On Hours: 34
Unsafe Shutdowns: 20
Media and Data Integrity Errors: 0
Error Information Log Entries: 6
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0
Error Information (NVMe Log 0x01, max 63 entries)
No Errors Logged
结盟：
$ sudo parted /dev/nvme0n1
GNU Parted 3.3
Using /dev/nvme0n1
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) align-check opt 1
1 aligned
至此，我的实验就到此结束了。我很想找到其他东西来尝试，或者看看 SSD 是否出了问题。（虽然它是全新的）
谢谢，克里斯