如何查看盘的类型

基本信息

查看控制器：

[root@xxxx /root]
#lspci | grep -i contro
00:11.4 SATA controller: Intel Corporation C610/X99 series chipset sSATA Controller [AHCI mode] (rev 05)
03:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS3008 PCI-Express Fusion-MPT SAS-3 (rev 02)

查看盘使用的哪个控制器：

[root@xxxx /root]
#ll /sys/block/ | grep 03:00.0
lrwxrwxrwx 1 root root 0 Jul 19 05:37 sdaa -> ../devices/pci0000:00/0000:00:03.0/0000:03:00.0/host10/port-10:0/expander-10:0/port-10:0:25/end_device-10:0:25/target10:0:25/10:0:25:0/block/sdaa
lrwxrwxrwx 1 root root 0 Jul 19 05:37 sdab -> ../devices/pci0000:00/0000:00:03.0/0000:03:00.0/host10/port-10:0/expander-10:0/port-10:0:26/end_device-10:0:26/target10:0:26/10:0:26:0/block/sdab
lrwxrwxrwx 1 root root 0 Jul 19 05:37 sdac -> ../devices/pci0000:00/0000:00:03.0/0000:03:00.0/host10/port-10:0/expander-10:0/port-10:0:27/end_device-10:0:27/target10:0:27/10:0:27:0/block/sdac

#cat /sys/block/sda/queue/rotational
1

1 表示非旋转类型的盘

1、 yum -y install smartmontools搜索

smartctl -a /dev/sda

可以看到vendor
硬盘是否打开了SMART支持
smartctl -i /dev/sda

2、查看硬盘的健康状况：

smartctl -H /dev/sda

3、详细的参数：

smartctl -A /dev/sdb

4、yum install hdparm

测试硬盘读写速度命令

#hdparm -tT /dev/sda
/dev/sda:

 Timing cached reads:   3286 MB in  1.99 seconds = 1653.51 MB/sec
 Timing buffered disk reads: 456 MB in  3.01 seconds = 151.47 MB/sec

5、或者创建个文件看速度

dd bs=1M count=128 if=/dev/zero of=test conv=fdatasync
dd if=/dev/zero of=/root/1Gb.file bs=1024 count=1000000

SATA && SAS

• SAS比SATA要贵很多
• SATA的limit： 600MB/s

AHCI && NVMe

• AHCI worker for HDD, but still support ssd
• Nvme based on PCI-E

Difference:

• AHCI only handle one queue at a time with up to 32 pending commands, It's enough for slowly hdd, but not a good thing for faster SSD.
• Nvme support 65000 queue,

PCI-e bus

• M.2 , SATA
• Nvme (BIOS should support it)

M.2

接口： M.2

总线标准： SATA， PCI-E

协议： Nvme， AHCI