工具1： storcli
a. 确认软件包是否安装
root@localhost \~\]#rpm -qa \| grep storcli
storcli-1.21.06-1.noarch
备注：若检索结果为空，需要安装对应的软件安装包。安装命令如下：
#rpm -ivh storcli-xx-xx-1.noarch.rpm
### **b. 查看逻辑卷读/写缓存状态**
备注：请关注标红部分示例为：NRWTD, 参数解释如下：
NR: No Read Ahead（关闭预读，即读缓存关闭）
R:Read Ahead(开启预读，即开启读缓存）
WB: Write Back（开启回写，即开启写缓存）
AWB: Always Write Back（强制开启回写，强制开启写缓存）
WT: Write Through(直写模式，关闭回写/写缓存）
> \[root@localhost \~\]# /opt/MegaRAID/storcli/storcli64 /c0/v1 show
>
> Controller = 0
>
> Status = Success
>
> Description = None
>
> Virtual Drives :
>
> ==============
>
> --------------------------------------------------------------
>
> DG/VD TYPE State Access Consist Cache Cac sCC Size Name
>
> --------------------------------------------------------------
>
> 1/1 RAID10 Optl RW No NRWTD - ON 2.180 TB
>
> --------------------------------------------------------------
>
> Cac=CacheCade\|Rec=Recovery\|OfLn=OffLine\|Pdgd=Partially Degraded\|Dgrd=Degraded
>
> Optl=Optimal\|RO=ReadOnly\|RW=ReadWrite\|HD=Hidden\|TRANS=TransportReady\|B=Blocked\| Consist=Consistent\|R=ReadAheadAlways\|NR=NoReadAhead\|WB=WriteBack\| AWB=AlwaysWriteBack\|WT=WriteThrough\|C=CachedIO\|D=DirectIO\|sCC=ScheduledCheck Consistency
### **c. 读缓存打开/关闭**
语法如下：
storcli /cx/vx set rdcache=RA\|NoRA
参数说明：
cx: x为数字，从0开始，代表控制器编号
vx: x为数字，从0开始，代表逻辑卷编号
RA: Read Ahead
NoRA: No Read Ahead
示例：
> \[root@localhost \~\]# /opt/MegaRAID/storcli/storcli64 /c0/v1 set rdcache=ra
>
> Controller = 0
>
> Status = Success
>
> Description = None
>
> Detailed Status :
>
> ===============
>
> ---------------------------------------
>
> VD Property Value Status ErrMsg ErrCd
>
> ---------------------------------------
>
> 1 rdCache RA Success - 0
>
> ---------------------------------------
>
> \[root@localhost \~\]# /opt/MegaRAID/storcli/storcli64 /c0/v1 set rdcache=nora
>
> Controller = 0
>
> Status = Success
>
> Description = None
>
> Detailed Status :
>
> ===============
>
> ---------------------------------------
>
> VD Property Value Status ErrMsg ErrCd
>
> ---------------------------------------
>
> 1 rdCache NoRA Success - 0
>
> ---------------------------------------
### **d. 写缓存打开/关闭**
语法如下：
storcli /cx/vx set wrcache=WT\|WB\|AWB
参数说明：
cx: x为数字，从0开始，代表控制器编号
vx: x为数字，从0开始，代表逻辑卷编号
WT: Write Through
WB: Write Back
AWB: Always Write Back
示例：
> \[root@localhost \~\]# /opt/MegaRAID/storcli/storcli64 /c0/v1 set wrcache=wt
>
> Controller = 0
>
> Status = Success
>
> Description = None
>
> Detailed Status :
>
> ===============
>
> ---------------------------------------
>
> VD Property Value Status ErrMsg ErrCd
>
> ---------------------------------------
>
> 1 wrCache WT Success - 0
>
> ---------------------------------------
>
> \[root@localhost \~\]# /opt/MegaRAID/storcli/storcli64 /c0/v1 set wrcache=wb
>
> Controller = 0
>
> Status = Success
>
> Description = None
>
> Detailed Status :
>
> ===============
>
> ---------------------------------------
>
> VD Property Value Status ErrMsg ErrCd
>
> ---------------------------------------
>
> 1 wrCache WB Success - 0
>
> ---------------------------------------
>
> \[root@localhost \~\]# /opt/MegaRAID/storcli/storcli64 /c0/v1 set wrcache=awb
>
> Controller = 0
>
> Status = Success
>
> Description = None
>
> Detailed Status :
>
> ===============
>
> ---------------------------------------
>
> VD Property Value Status ErrMsg ErrCd
>
> ---------------------------------------
>
> 1 wrCache AWB Success - 0
>
> ---------------------------------------
## **工具2：megacli**
### **a. 确认软件包是否安装**
\[root@localhost \~\]# rpm -qa \| grep -i MegaCli
MegaCli-8.07.10-1.noarch
备注：若检索结果为空，需要安装对应的软件安装包。安装命令如下：
#rpm -ivh MegaCli-xx-xx-1.noarch.rpm
### **b. 查看逻辑卷读/写缓存状态**
请关注标红部分示例为： WriteBack, ReadAheadNone, Direct, Write Cache OK if Bad BBU, 参数解释如下：
NORA: No Read Ahead（关闭预读，即读缓存关闭）
RA:Read Ahead(开启预读，即开启读缓存）
WB: Write Back（开启回写，即开启写缓存）
ForcedWB: Forced Write Back（强制开启回写，强制开启写缓存）
WT: Write Through(直写模式，关闭回写/写缓存）
示例：
> \[root@localhost \~\]# /opt/MegaRAID/MegaCli/MegaCli64 -ldinfo -l1 -a0
>
> Adapter 0 -- Virtual Drive Information:
>
> Virtual Drive: 1 (Target Id: 1)
>
> Name :
>
> RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0
>
> Size : 2.180 TB
>
> Sector Size : 512
>
> Is VD emulated : Yes
>
> Mirror Data : 2.180 TB
>
> State : Optimal
>
> Strip Size : 64 KB
>
> Number Of Drives per span:2
>
> Span Depth : 5
>
> Default Cache Policy: WriteBack, ReadAheadNone, Direct, Write Cache OK if Bad BBU
>
> Current Cache Policy: WriteBack, ReadAheadNone, Direct, Write Cache OK if Bad BBU
>
> Default Access Policy: Read/Write
>
> Current Access Policy: Read/Write
>
> Disk Cache Policy : Disk's Default
>
> Ongoing Progresses:
>
> Check Consistency : Completed 26%, Taken 493 min.
>
> Encryption Type : None
>
> Bad Blocks Exist: No
>
> PI type: No PI
>
> Is VD Cached: No
>
> Exit Code: 0x00
### **c. 读/写缓存打开/关闭**
语法如下：
MegaCli -LDSetProp {-Name LdNamestring} \| -RW\|RO\|Blocked\|RemoveBlocked \| WT\|WB\|ForcedWB \[-Immediate\] \|RA\|NORA\|ADRA \|
DsblPI
\| Cached\|Direct \| -EnDskCache\|DisDskCache \| CachedBadBBU\|NoCachedBadBBU
-Lx\|-L0,1,2\|-Lall -aN\|-a0,1,2\|-aALL
参数说明：
aN: N为数字，从0开始，代表控制器编号
Lx: x为数字，从0开始，代表逻辑卷编号
NORA: No Read Ahead（关闭预读，即读缓存关闭）
RA:Read Ahead(开启预读，即开启读缓存）
WB: Write Back（开启回写，即开启写缓存）
ForcedWB: Forced Write Back（强制开启回写，强制开启写缓存）
WT: Write Through(直写模式，关闭回写/写缓存）
**读缓存修改示例：**
> \[root@localhost \~\]# /opt/MegaRAID/MegaCli/MegaCli64 -LdSetProp RA -L1 -a0
>
> Set Read Policy to ReadAhead on Adapter 0, VD 1 (target id: 1) success
>
> Exit Code: 0x00
>
> \[root@localhost \~\]# /opt/MegaRAID/MegaCli/MegaCli64 -LdSetProp NORA -L1 -a0
>
> Set Read Policy to NoReadAhead on Adapter 0, VD 1 (target id: 1) success
>
> Exit Code: 0x00
**读缓存修改示例：**
> \[root@localhost \~\]# /opt/MegaRAID/MegaCli/MegaCli64 -LdSetProp WB -L1 -a0
>
> Set Write Policy to WriteBack on Adapter 0, VD 1 (target id: 1) success
>
> Exit Code: 0x00
>
> \[root@localhost \~\]#/opt/MegaRAID/MegaCli/MegaCli64 -LdSetProp WT -L1 -a0
>
> Set Write Policy to WriteThrough on Adapter 0, VD 1 (target id: 1) success
>
> Exit Code: 0x00
>
> \[root@localhost \~\]#/opt/MegaRAID/MegaCli/MegaCli64 -LdSetProp ForcedWB -L1 -a0
>
> Set Write Policy to Forced WriteBack on Adapter 0, VD 1 (target id: 1) success
>
> Exit Code: 0x00
## **工具3：hpssacli/ssacli**
说明：
1. hpssacli工具为旧工具，目前大部分线上服务器都安装有对应的安装包，ssacli为新工具，在旧工具无法正常执行的情况下，建议使用新工具，语法完全一致。
2. ssdsmartpath（固态硬盘智能路径）和caching(写缓存）只能打开一个，在一个打开的状态下，另外一个的值必定是关闭的,例如：
caching：Enable的情况下，ssdsmartpath的值必定为disabled.
### **a. 确认安装包是否安装**
\[root@localhost \~\]# rpm -qa \| grep hpssacli
hpssacli-2.20-11.0.x86_64
备注：若检索结果为空，需要安装对应的软件安装包。安装命令如下：
#rpm -ivh hpssacli-xx-xx.x86_64.rpm
#rpm -ivh ssacli-xx-xx.x86_64.rpm
### **b. 确认硬盘控制器所在slot插槽**
说明：如下所示， 阵列卡型号为Smart Array P840ar, 插槽位置为Slot 0, 务必查询信息，插槽位置后面的命令要用。
\[root@localhost \~\]# hpssacli ctrl all show
Smart Array P840ar in Slot 0 (Embedded) (sn: PVYKH0BRH710CO)
### **c. 确认逻辑卷写缓存(caching)状态**
参数说明：
ctrl: Controller 简写
slot=0: 硬盘控制器所在PCIe插槽位置
ld 2: ld(logical drive 逻辑卷）,后面的数字为逻辑卷编号，顺序从1开始
show: 信息展示
说明：请关注示例中caching的值，示例中为Disabled(即关闭）
> \[root@localhost \~\]# hpssacli ctrl slot=0 ld 2 show
>
> Smart Array P840ar in Slot 0 (Embedded)
>
> array B
>
> Logical Drive: 2
>
> Size: 2.2 TB
>
> Fault Tolerance: 1+0
>
> Heads: 255
>
> Sectors Per Track: 32
>
> Cylinders: 65535
>
> Strip Size: 256 KB
>
> Full Stripe Size: 1280 KB
>
> Status: OK
>
> MultiDomain Status: OK
>
> Caching: Disabled
>
> Unique Identifier: 600508B1001C0D8EB99EB2A7EE5060E4
>
> Disk Name: /dev/sdb
>
> Mount Points: /opt/uredis 2.2 TB Partition Number 1
>
> Logical Drive Label: 06172624PVYKH0BRH710COB70A
>
> Mirror Group 1:
>
> physicaldrive 1I:1:5 (port 1I:box 1:bay 5, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 1I:1:6 (port 1I:box 1:bay 6, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 1I:1:7 (port 1I:box 1:bay 7, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 1I:1:8 (port 1I:box 1:bay 8, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 1I:1:4 (port 1I:box 1:bay 4, Solid State SATA, 480.1 GB, OK)
>
> Mirror Group 2:
>
> physicaldrive 1I:1:3 (port 1I:box 1:bay 3, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 2I:2:1 (port 2I:box 2:bay 1, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 2I:2:2 (port 2I:box 2:bay 2, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 2I:2:3 (port 2I:box 2:bay 3, Solid State SATA, 480.1 GB, OK)
>
> physicaldrive 2I:2:4 (port 2I:box 2:bay 4, Solid State SATA, 480.1 GB, OK)
>
> Drive Type: Data
>
> LD Acceleration Method: HP SSD Smart Path
### **d. 确认逻辑卷ssdsmartpath状态**
参数说明：
ctrl: Controller 简写
slot=0: 硬盘控制器所在PCIe插槽位置
array b: ld(array, 磁盘阵列，也即逻辑卷）,后面的字母为逻辑卷编号，顺序从a开始
show: 信息展示
说明：请关注示例中ssdsmartpath的值，示例中为Enable(即关闭）
> \[root@localhost \~\]# hpssacli ctrl slot=0 array b show
>
> Smart Array P840ar in Slot 0 (Embedded)
>
> Array: B
>
> Interface Type: Solid State SATA
>
> Unused Space: 0 MB (0.0%)
>
> Used Space: 4.4 TB (100.0%)
>
> Status: OK
>
> MultiDomain Status: OK
>
> Array Type: Data
>
> HP SSD Smart Path: enable
### **e. 关闭固态硬件智能路径并打开写缓存示例**
\[root@localhost \~\]# hpssacli ctrl slot=0 array b modify ssdsmartpath=disable
\[root@localhost \~\]# hpssacli ctrl slot=0 ld 2 modify caching=enable
### **f. 关闭写缓存并打开固态硬盘智能路径**
\[root@localhost \~\]# hpssacli ctrl slot=0 ld 2 modify caching=disable
\[root@localhost \~\]# hpssacli ctrl slot=0 array b modify ssdsmartpath=enable
## **工具4： arcconf**
### **a. 确认软件包是否安装**
\[root@localhost \~\]# rpm -qa \| grep Arcconf
Arcconf-2.04-22665.x86_64
备注：若检索结果为空，需要安装对应的软件安装包。安装命令如下：
#rpm -ivh Arcconf-xx-xx.x86_64.rpm
### **b. 确认硬盘控制器信息**
说明：控制器编号从1开始，所以示例中控制器ID为1:
> \[root@localhost \~\]# /usr/Arcconf/arcconf list
>
> Controllers found: 1
>
> ----------------------------------------------------------------------
>
> Controller information
>
> ----------------------------------------------------------------------
>
> Controller ID : Status, Slot, Mode, Name, SerialNumber, WWN
>
> ----------------------------------------------------------------------
>
> Controller 1: : Optimal, Slot 2147483647, RAID (Expose RAW), , FB488000, 560DA833FB488000
### **c. 查看逻辑卷读/写缓存状态**
备注：
1. 请关注标红部分示例为：参数说明如下：
Read-cache setting : Enabled(读缓存打开)
Write-cache setting : Enabled(写缓存打开）
2. 示例命令行参数说明（/usr/Arcconf/arcconf getconfig 1 ld 1）
getconfig: prints controller information(打印控制器相关信息）
第一个1：控制器编号
ld:logical drive(逻辑卷，即磁盘阵列）
第二个1：逻辑卷编号，从0开始，示例是第二个逻辑卷，所以为1.
> \[root@localhost \~\]# /usr/Arcconf/arcconf getconfig 1 ld 1
>
> Controllers found: 1
>
> ----------------------------------------------------------------------
>
> Logical device information
>
> ----------------------------------------------------------------------
>
> Logical Device number 1
>
> Logical Device name : data
>
> Block Size of member drives : 512 Bytes
>
> RAID level : 10
>
> Unique Identifier : 6CDE0BB1
>
> Status of Logical Device : Optimal
>
> Additional details : Quick initialized
>
> Size : 1014 MB
>
> Parity space : 1024 MB
>
> Stripe-unit size : 256 KB
>
> Interface Type : Serial ATA
>
> Device Type : HDD
>
> Read-cache setting : Enabled
>
> Read-cache status : On
>
> Write-cache setting : Enabled
>
> Write-cache status : On
>
> Partitioned : No
>
> Protected by Hot-Spare : No
>
> Bootable : No
>
> Failed stripes : No
>
> Power settings : Disabled
>
> --------------------------------------------------------
>
> Logical Device segment information
>
> --------------------------------------------------------
>
> Group 0, Segment 0 : Present (3815447MB, SATA, HDD, Enclosure:0, Slot:2) K4KZMMKL
>
> Group 0, Segment 1 : Present (3815447MB, SATA, HDD, Enclosure:0, Slot:3) K7G2L3SL
>
> Group 1, Segment 0 : Present (3815447MB, SATA, HDD, Enclosure:0, Slot:4) K4KYTSLL
>
> Group 1, Segment 1 : Present (3815447MB, SATA, HDD, Enclosure:0, Slot:5) K7G183TL
### **d. 读/写缓存设置语法**
语法如下：
Usage: SETCACHE \
Usage: SETCACHE <Controller#> DEVICE <Channel# ID#> <physical mode> [nologs]
Usage: SETCACHE <Controller#> DEVICEALL <policy> [noprompt] [nologs]
Example: SETCACHE 1 LOGICALDRIVE 0 ron
Example: SETCACHE 1 DEVICE 0 0 wt
Example: SETCACHE 1 DEVICEALL drivespecific
===================================================================================
Changes a device's cache mode.
LOGICALDRIVE parameters
LogicalDrive# : Number of the logical device whose cache will be altered
Logical Modes : ron - read cache enabled
roff - read cache disabled
wt - write through
wb - write back
wbb - write back with battery/ZMM
con - cache enabled
coff - cache disabled
DEVICE parameters
Channel# ID# : Channel and ID of the device whose cache will be altered
Physical Modes : wt - write through
wb - write back
DEVICEALL parameters
Policy : disable - write back for all physical drives
enable - write through for all physical drives
drivespecific - user can set for an individual physical drive
部分参数说明：
rron: read cache enabled(打开读缓存)
roff: read cache disabled(关闭读缓存)
wt: write through(只写模式，即关闭写缓存）
wb:write back(回写模式，即打开写缓存）
con: cache enabled(打开逻辑卷缓存（打开读/写缓存前提是逻辑卷缓存已打开，在逻辑卷关闭的情况下，无法打开读/写缓存））
coff: cache disabled(关闭逻辑卷缓存）
noprompt：no prompt(没有提示，按照默认y执行，部分命令需要和用户交互，使用noprompt参数可按照默认yes答复执行）
e. 读缓存打开/关闭示例
root@localhost \~\]# /usr/Arcconf/arcconf setcache 1 logicaldrive 1 roff Controllers found: 1 Command completed successfully. \[root@localhost \~\]# /usr/Arcconf/arcconf setcache 1 logicaldrive 1 ron Controllers found: 1 Command completed successfully. ### **f. 写缓存打开/关闭示例** \[root@localhost \~\]# /usr/Arcconf/arcconf setcache 1 logicaldrive 1 wt Controllers found: 1 Command completed successfully. You have new mail in /var/spool/mail/root \[root@localhost \~\]# /usr/Arcconf/arcconf setcache 1 logicaldrive 1 wb Controllers found: 1 WARNING: Power failure without battery/ZMM support will lead to data loss. Do you wish to continue? Press y, then ENTER to continue or press ENTER to abort: y Command completed successfully. \[root@localhost \~\]# /usr/Arcconf/arcconf setcache 1 logicaldrive 1 wbb Controllers found: 1 Command completed successfully