1. 判断磁盘是SSD或HDD盘
1、没有使用raid方案
lsblk -d -o name,rota命令，0表示SSD，1表示HDD
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NAME ROTA
sda 0
sdb 1
sdc 1
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2、使用raid方案
下载工具
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| wget https://raw.githubusercontent.com/eLvErDe/hwraid/master/wrapper-scripts/megaclisas-status
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执行检测命令
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| $ megaclisas-status
-- Controller information --
-- ID | H/W Model | RAM | Temp | BBU | Firmware
c0 | SAS3508 | 2048MB | 55C | Good | FW: 50.6.3-0109
-- Array information --
-- ID | Type | Size | Strpsz | Flags | DskCache | Status | OS Path | CacheCade |InProgress
c0u0 | RAID-1 | 1089G | 256 KB | RA,WB | Default | Optimal | /dev/sda | None |None
c0u1 | RAID-5 | 2616G | 256 KB | RA,WB | Default | Optimal | /dev/sdb | None |None
-- Disk information --
-- ID | Type | Drive Model | Size | Status | Speed | Temp | Slot ID | LSI ID
c0u0p0 | HDD | TOSHIBA AL15SEB120N 080710R0A0LJFDWG | 1.089 TB | Online, Spun Up | 12.0Gb/s | 27C | [134:4] | 0
c0u0p1 | HDD | TOSHIBA AL15SEB120N 080710S0A10SFDWG | 1.089 TB | Online, Spun Up | 12.0Gb/s | 28C | [134:5] | 5
c0u1p0 | SSD | HUAWEI HWE52SS3960L005N3248033GSN10L5002816 | 893.1 Gb | Online, Spun Up | 12.0Gb/s | 29C | [134:0] | 2
c0u1p1 | SSD | HUAWEI HWE52SS3960L005N3248033GSN10L5002799 | 893.1 Gb | Online, Spun Up | 12.0Gb/s | 30C | [134:1] | 4
c0u1p2 | SSD | HUAWEI HWE52SS3960L005N3248033GSN10L5002805 | 893.1 Gb | Online, Spun Up | 12.0Gb/s | 29C | [134:2] | 1
c0u1p3 | SSD | HUAWEI HWE52SS3960L005N3248033GSN10L5002797 | 893.1 Gb | Online, Spun Up | 12.0Gb/s | 29C | [134:3] | 3
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2. 解决umount target is busy挂载盘卸载不掉问题
问题描述:
由于有进程占用目录，因此无法umount目录，需要先将占用进程杀死，再umount目录。
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| $ umount /data
umount: /data: target is busy.
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查看目录占用进程：
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USER PID ACCESS COMMAND
/mnt: root kernel mount /mnt
root 13830 ..c.. bash
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杀死目录占用进程
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USER PID ACCESS COMMAND
/mnt: root kernel mount /mnt
root 13830 ..c.. bash
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fuser命令参数说明
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| -k,--kill kill processes accessing the named file
-m,--mount show all processes using the named filesystems or block device
-v,--verbose verbose output
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