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我面临以下问题：
我的固态硬盘三星EVO 850让我非常慢写表现。
我只得到大约。150MB/秒，很多时候情况比这更糟。我期望更高的写入输出。
dd if=debian-8.2.0-amd64-CD-1.iso of=testfile bs=1M count=1024 conv=fdatasync,notrunc
627+0 records in
627+0 records out
657457152 bytes (657 MB) copied, 4.31444 s, 152 MB/s
我的系统上有什么：
- Linux——Debian——7.9
- 内核版本：Linux 3.10.0-13-pve #1 SMP Fri Oct 9 11:36:12 CEST 2015 x86_64 GNU/Linux
- 安装了 3.4-166 版本的 Proxmox
我不知道如何查看问题可能出在哪里。使用类似iostat、iotop、dstat、strace一点帮助都没有。我仍然陷入困境。
非常感谢任何建议。我应该用类似这样的工具来分析吗？系统水龙头？
请参阅输出串行通信命令。
00:00.0 Host bridge: Intel Corporation 5520 I/O Hub to ESI Port (rev 13)
00:01.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 1 (rev 13)
00:02.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 2 (rev 13)
00:03.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 3 (rev 13)
00:04.0 PCI bridge: Intel Corporation 5520/X58 I/O Hub PCI Express Root Port 4 (rev 13)
00:05.0 PCI bridge: Intel Corporation 5520/X58 I/O Hub PCI Express Root Port 5 (rev 13)
00:06.0 PCI bridge: Intel Corporation 5520/X58 I/O Hub PCI Express Root Port 6 (rev 13)
00:07.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 7 (rev 13)
00:08.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 8 (rev 13)
00:09.0 PCI bridge: Intel Corporation 7500/5520/5500/X58 I/O Hub PCI Express Root Port 9 (rev 13)
00:0a.0 PCI bridge: Intel Corporation 7500/5520/5500/X58 I/O Hub PCI Express Root Port 10 (rev 13)
00:0d.0 Host bridge: Intel Corporation Device 343a (rev 13)
00:0d.1 Host bridge: Intel Corporation Device 343b (rev 13)
00:0d.2 Host bridge: Intel Corporation Device 343c (rev 13)
00:0d.3 Host bridge: Intel Corporation Device 343d (rev 13)
00:0d.4 Host bridge: Intel Corporation 7500/5520/5500/X58 Physical Layer Port 0 (rev 13)
00:0d.5 Host bridge: Intel Corporation 7500/5520/5500 Physical Layer Port 1 (rev 13)
00:0d.6 Host bridge: Intel Corporation Device 341a (rev 13)
00:0e.0 Host bridge: Intel Corporation Device 341c (rev 13)
00:0e.1 Host bridge: Intel Corporation Device 341d (rev 13)
00:0e.2 Host bridge: Intel Corporation Device 341e (rev 13)
00:0e.3 Host bridge: Intel Corporation Device 341f (rev 13)
00:0e.4 Host bridge: Intel Corporation Device 3439 (rev 13)
00:14.0 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub System Management Registers (rev 13)
00:14.1 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub GPIO and Scratch Pad Registers (rev 13)
00:14.2 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub Control Status and RAS Registers (rev 13)
00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 1
00:1c.4 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 5
00:1d.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1
00:1d.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2
00:1d.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3
00:1d.3 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #6
00:1d.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
00:1f.0 ISA bridge: Intel Corporation 82801JIB (ICH10) LPC Interface Controller
01:03.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI ES1000 (rev 02)
02:00.0 System peripheral: Hewlett-Packard Company Integrated Lights-Out Standard Slave Instrumentation & System Support (rev 04)
02:00.2 System peripheral: Hewlett-Packard Company Integrated Lights-Out Standard Management Processor Support and Messaging (rev 04)
02:00.4 USB controller: Hewlett-Packard Company Integrated Lights-Out Standard Virtual USB Controller (rev 01)
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
03:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
04:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
04:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
05:00.0 RAID bus controller: Hewlett-Packard Company Smart Array G6 controllers (rev 01)
06:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)
09:00.0 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (rev 02)
09:00.1 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (rev 02)
3e:00.0 Host bridge: Intel Corporation Xeon 5600 Series QuickPath Architecture Generic Non-core Registers (rev 02)
3e:00.1 Host bridge: Intel Corporation Xeon 5600 Series QuickPath Architecture System Address Decoder (rev 02)
3e:02.0 Host bridge: Intel Corporation Xeon 5600 Series QPI Link 0 (rev 02)
3e:02.1 Host bridge: Intel Corporation Xeon 5600 Series QPI Physical 0 (rev 02)
3e:02.2 Host bridge: Intel Corporation Xeon 5600 Series Mirror Port Link 0 (rev 02)
3e:02.3 Host bridge: Intel Corporation Xeon 5600 Series Mirror Port Link 1 (rev 02)
3e:02.4 Host bridge: Intel Corporation Xeon 5600 Series QPI Link 1 (rev 02)
3e:02.5 Host bridge: Intel Corporation Xeon 5600 Series QPI Physical 1 (rev 02)
3e:03.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Registers (rev 02)
3e:03.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Target Address Decoder (rev 02)
3e:03.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller RAS Registers (rev 02)
3e:03.4 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Test Registers (rev 02)
3e:04.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Control (rev 02)
3e:04.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Address (rev 02)
3e:04.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Rank (rev 02)
3e:04.3 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Thermal Control (rev 02)
3e:05.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Control (rev 02)
3e:05.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Address (rev 02)
3e:05.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Rank (rev 02)
3e:05.3 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Thermal Control (rev 02)
3e:06.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Control (rev 02)
3e:06.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Address (rev 02)
3e:06.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Rank (rev 02)
3e:06.3 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Thermal Control (rev 02)
3f:00.0 Host bridge: Intel Corporation Xeon 5600 Series QuickPath Architecture Generic Non-core Registers (rev 02)
3f:00.1 Host bridge: Intel Corporation Xeon 5600 Series QuickPath Architecture System Address Decoder (rev 02)
3f:02.0 Host bridge: Intel Corporation Xeon 5600 Series QPI Link 0 (rev 02)
3f:02.1 Host bridge: Intel Corporation Xeon 5600 Series QPI Physical 0 (rev 02)
3f:02.2 Host bridge: Intel Corporation Xeon 5600 Series Mirror Port Link 0 (rev 02)
3f:02.3 Host bridge: Intel Corporation Xeon 5600 Series Mirror Port Link 1 (rev 02)
3f:02.4 Host bridge: Intel Corporation Xeon 5600 Series QPI Link 1 (rev 02)
3f:02.5 Host bridge: Intel Corporation Xeon 5600 Series QPI Physical 1 (rev 02)
3f:03.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Registers (rev 02)
3f:03.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Target Address Decoder (rev 02)
3f:03.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller RAS Registers (rev 02)
3f:03.4 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Test Registers (rev 02)
3f:04.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Control (rev 02)
3f:04.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Address (rev 02)
3f:04.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Rank (rev 02)
3f:04.3 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 0 Thermal Control (rev 02)
3f:05.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Control (rev 02)
3f:05.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Address (rev 02)
3f:05.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Rank (rev 02)
3f:05.3 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 1 Thermal Control (rev 02)
3f:06.0 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Control (rev 02)
3f:06.1 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Address (rev 02)
3f:06.2 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Rank (rev 02)
3f:06.3 Host bridge: Intel Corporation Xeon 5600 Series Integrated Memory Controller Channel 2 Thermal Control (rev 02)
答案1
根据您发布的输出，您的主板有一个 ICH10 芯片组，即 SATA II。因此，您的读/写速度应该在 250/270 左右，接近 SSD 的一半，即 SATA III。这就是我在使用相同芯片组的 iMac 和三星 Pro 上获得的结果。不要期望比这更高。
我不是 Linux 专家，但我只是想让您了解 X58 与 ICH10 的局限性。