[root@SC4304 ~]# dmidecode -t 16
# dmidecode 2.11
# SMBIOS entry point at 0xb89a5000
SMBIOS 2.7 present.
Handle 0x1000, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: Multi-bit ECC
Maximum Capacity: 1536 GB
Error Information Handle: Not Provided
Number Of Devices: 24
从上面的信息我们可以看出：
内存插槽数：24个
最大扩展内存：1536G
单跟内存条最大：64G
现在内存为：128G
但是，我们还必须查清这里的128G到底是16*8GB, 2*64GB还是其他？就是查看已使用的插槽数
如果是2*64GB，那么可以扩展到1536GB，但是如果插槽已经插满，无法扩展了：
1、查看内存槽数、哪个槽位插了内存，大小是多少
[root@SC4305 ~]# dmidecode|grep -A5 'Memory Device'|grep Size
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
Size: No Module Installed
2、查看最大支持内存数
[root@SC4305 ~]# dmidecode|grep 'Maximum Capacity'
Maximum Capacity: 1536 GB
3、查看槽位上内存的速率，没插就是unknown。
[root@SC4305 ~]# dmidecode|grep -A16 'Memory Device'|grep 'Speed'
Speed: 1600 MHz
Speed: 1600 MHz
Speed: 1600 MHz
Speed: 1600 MHz
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: 1600 MHz
Speed: 1600 MHz
Speed: 1600 MHz
Speed: 1600 MHz
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
Speed: Unknown
五、一个查看基本硬件信息的shell脚本
[root@SC4306 test]# cat test.sh
#!/bin/bash
echo "IP:"
ifconfig |grep "inet addr"|grep -v 127.0.0.1|awk '{print $2}'|awk -F ':' '{print $2}'
echo "Product Name:"
dmidecode |grep Name
echo "CPU Info:"
dmidecode |grep -i cpu|grep -i version|awk -F ':' '{print $2}'
echo "Disk Info:"
parted -l|grep 'Disk /dev/sd'|awk -F ',' '{print " ",$1}'
echo "Network Info:"
lspci |grep Ethernet
echo "Memory Info:"
dmidecode|grep -A5 "Memory Device"|grep Size|grep -v No
echo "Memory number:"`dmidecode|grep -A5 "Memory Device"|grep Size|grep -v No|wc -l`
输出结果：
[root@SC4306 test]# bash test.sh
IP:
10.0.17.6
10.0.250.6
Product Name:
Product Name: PowerEdge R720
SKU Number: SKU=NotProvided;ModelName=PowerEdge R720
Product Name: 0DCWD1
CPU Info:
Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
Disk Info:
Disk /dev/sda: 1074GB
Disk /dev/sdb: 18.9TB
Network Info:
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
01:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
Memory Info:
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Memory number:8