IT博客汇 | lsiutil设置磁盘带宽

lsiutil设置磁盘带宽

夜行人发表于 2017-04-10 08:33:48

1. 问题

DELL R410自带RAID卡是SAS6IR，机械盘接上去带宽是3G，而SSD，无论是三星还是闪迪，都只有1.5G，查看指令

./lsiutil -p1 -a 69,8,21,4,0,0

有问题的结果，其中1.5处为接SSD的端口

SAS1068E's links are 3.0 G, 3.0 G, 3.0 G, 1.5 G, off, off, off, off

2. 解决

2.1 方法一

换个RAID卡，如 PERC 6i或者H700，贵

2.2 方法二

换pcie口的SSD，价格是sata口的两倍，贵

2.3 方法三

可以通过lsiutil（要求Version 1.62或以上）设置磁盘的带宽，此机接了4个盘，所以，具体设置，请根据实际情况选择

[root@localhost src]# ./lsiutil -p1 -a 69

LSI Logic MPT Configuration Utility, Version 1.63, June 4, 2009

1 MPT Port found

     Port Name         Chip Vendor/Type/Rev    MPT Rev  Firmware Rev  IOC
 1.  /proc/mpt/ioc0    LSI Logic SAS1068E B3     105      00192f00     0

Main menu, select an option:  [1-99 or e/p/w or 0 to quit] 69

Seg/Bus/Dev/Fun    Board Name       Board Assembly   Board Tracer
 0   2   0   0     SAS6IR                                            

# 输入13进行操作
Main menu, select an option:  [1-99 or e/p/w or 0 to quit] 13  

# 以下3行，直接回车即可
SATA Maximum Queue Depth:  [0 to 255, default is 8] 
Device Missing Report Delay:  [0 to 2047, default is 0] 
Device Missing I/O Delay:  [0 to 255, default is 0] 

PhyNum  Link      MinRate  MaxRate  Initiator  Target    Port
   0    Enabled     1.5      3.0    Enabled    Disabled  Auto
   1    Enabled     1.5      3.0    Enabled    Disabled  Auto
   2    Enabled     1.5      3.0    Enabled    Disabled  Auto
   3    Enabled     1.5      3.0    Enabled    Disabled  Auto
   4    Disabled    1.5      3.0    Enabled    Disabled  Auto
   5    Disabled    1.5      3.0    Enabled    Disabled  Auto
   6    Disabled    1.5      3.0    Enabled    Disabled  Auto
   7    Disabled    1.5      3.0    Enabled    Disabled  Auto

# 此处选择3，是我们接SSD的位置
Select a Phy:  [0-7, 8=AllPhys, RETURN to quit] 3
# 直接回车
Link:  [0=Disabled, 1=Enabled, default is 1] 
# 设置最小带宽，关键操作，选择1
MinRate:  [0=1.5 Gbps, 1=3.0 Gbps, default is 0] 1
# 以下4行，直接回车
MaxRate:  [0=1.5 Gbps, 1=3.0 Gbps, default is 1] 
Initiator:  [0=Disabled, 1=Enabled, default is 1] 
Target:  [0=Disabled, 1=Enabled, default is 0] 
Port:  [0 to 7 for manual config, 8 for auto config, default is 8] 

PhyNum  Link      MinRate  MaxRate  Initiator  Target    Port
   0    Enabled     1.5      3.0    Enabled    Disabled  Auto
   1    Enabled     1.5      3.0    Enabled    Disabled  Auto
   2    Enabled     1.5      3.0    Enabled    Disabled  Auto
   3    Enabled     3.0      3.0    Enabled    Disabled  Auto
   4    Disabled    1.5      3.0    Enabled    Disabled  Auto
   5    Disabled    1.5      3.0    Enabled    Disabled  Auto
   6    Disabled    1.5      3.0    Enabled    Disabled  Auto
   7    Disabled    1.5      3.0    Enabled    Disabled  Auto

# 以下4行，直接回车
Select a Phy:  [0-7, 8=AllPhys, RETURN to quit] 
Persistence:  [0=Disabled, 1=Enabled, default is 1] 
Physical mapping:  [0=None, 1=DirectAttach, 2=EnclosureSlot, default is 2] 
Number of Target IDs to reserve:  [0 to 32, default is 8] 

# 输入0退出设置
Main menu, select an option:  [1-99 or e/p/w or 0 to quit] 0

经过以上设置，重启系统，再次确认，带宽已经变为3，cp大量小文件，性能也提升了50%

参考资料

SAS 6/iR Integrated SAS + SATA (SSD) Negotiated speed PE1950，搜Suggested Answer，看资料，是DELL限制了非DELL SSD的带宽，o(╯□╰)o。