Check the amount of RAM on the server
Solution 1:
One nice tool (in addition to dmidecode) is lshw.
E.g.,
$ sudo lshw -short -C memory
H/W path Device Class Description
==========================================================
/0/0 memory 64KiB BIOS
/0/400/700 memory 16KiB L1 cache
/0/400/701 memory 1MiB L2 cache
/0/1000 memory 2GiB System Memory
/0/1000/0 memory 512MiB DIMM SDRAM Synchronous 400 MHz (2.5
/0/1000/1 memory 512MiB DIMM SDRAM Synchronous 400 MHz (2.5
/0/1000/2 memory 512MiB DIMM SDRAM Synchronous 400 MHz (2.5
/0/1000/3 memory 512MiB DIMM SDRAM Synchronous 400 MHz (2.5
Or
$ sudo lshw -C memory
[...]
*-cache:0
description: L1 cache
physical id: 700
size: 16KiB
capacity: 16KiB
capabilities: internal write-back data
[...]
*-memory
description: System Memory
physical id: 1000
slot: System board or motherboard
size: 2GiB
*-bank:0
description: DIMM SDRAM Synchronous 400 MHz (2.5 ns)
physical id: 0
slot: DIMM_1
size: 512MiB
width: 64 bits
clock: 400MHz (2.5ns)
*-bank:1
description: DIMM SDRAM Synchronous 400 MHz (2.5 ns)
physical id: 1
slot: DIMM_3
size: 512MiB
width: 64 bits
clock: 400MHz (2.5ns)
*-bank:2
[...]
Solution 2:
Another option is the lshw command (man page) - it gives output about lots of things including the RAM slots. The full output is very long, but sudo lshw -short gives a summary including one line per RAM slot, whether or not there is any RAM in the slot. Or for the full info on RAM, but omitting everything else you could do sudo lshw -class memory.
The output I get from sudo lshw -short is:
H/W path Device Class Description
=============================================================
system ESPRIMO E ()
/0 bus D2348-A2
/0/0 memory 109KiB BIOS
/0/4 processor Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz
/0/4/6 memory 2MiB L2 cache
/0/7 memory 2MiB L3 cache
/0/25 memory 6GiB System Memory
/0/25/0 memory 2GiB DIMM DDR2 Synchronous 533 MHz (1.9 ns)
/0/25/1 memory 1GiB DIMM DDR2 Synchronous 533 MHz (1.9 ns)
/0/25/2 memory 2GiB DIMM DDR2 Synchronous 533 MHz (1.9 ns)
/0/25/3 memory 1GiB DIMM DDR2 Synchronous 533 MHz (1.9 ns)
/0/100 bridge 82Q963/Q965 Memory Controller Hub
/0/100/2 display 82Q963/Q965 Integrated Graphics Controller
/0/100/3 communication 82Q963/Q965 HECI Controller
/0/100/3.2 storage 82Q963/Q965 PT IDER Controller
/0/100/3.3 communication 82Q963/Q965 KT Controller
/0/100/19 eth0 network 82566DM Gigabit Network Connection
/0/100/1a bus 82801H (ICH8 Family) USB UHCI Controller #4
/0/100/1a.1 bus 82801H (ICH8 Family) USB UHCI Controller #5
/0/100/1a.7 bus 82801H (ICH8 Family) USB2 EHCI Controller #2
/0/100/1b multimedia 82801H (ICH8 Family) HD Audio Controller
/0/100/1d bus 82801H (ICH8 Family) USB UHCI Controller #1
/0/100/1d.1 bus 82801H (ICH8 Family) USB UHCI Controller #2
/0/100/1d.2 bus 82801H (ICH8 Family) USB UHCI Controller #3
/0/100/1d.7 bus 82801H (ICH8 Family) USB2 EHCI Controller #1
/0/100/1e bridge 82801 PCI Bridge
/0/100/1f bridge 82801HO (ICH8DO) LPC Interface Controller
/0/100/1f.2 scsi0 storage 82801H (ICH8 Family) 4 port SATA IDE Controller
/0/100/1f.2/0 /dev/sda disk 160GB ST3160812AS
/0/100/1f.2/0/1 /dev/sda1 volume 149GiB EXT4 volume
/0/100/1f.2/1 /dev/cdrom disk DVD-RAM GSA-H30N
/0/100/1f.3 bus 82801H (ICH8 Family) SMBus Controller
/0/100/1f.5 scsi2 storage 82801H (ICH8 Family) 2 port SATA IDE Controller
/0/100/1f.5/0.0.0 /dev/sdb disk 40GB KINGSTON SSDNow
/0/100/1f.5/0.0.0/1 /dev/sdb1 volume 31GiB EXT4 volume
/0/100/1f.5/0.0.0/2 /dev/sdb2 volume 5867MiB Extended partition
/0/100/1f.5/0.0.0/2/5 /dev/sdb5 volume 5867MiB Linux swap / Solaris partition
/1 power S26113-E505-V80
/2 wlan0 network Wireless interface
The output I get from sudo lshw -class memory is:
*-firmware
description: BIOS
vendor: FUJITSU SIEMENS // Phoenix Technologies Ltd.
physical id: 0
version: 6.00 R1.02.2348.A2
date: 09/18/2006
size: 109KiB
capacity: 448KiB
capabilities: pci pnp upgrade shadowing escd cdboot bootselect int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification
*-cache
description: L2 cache
physical id: 6
slot: L2 Cache
size: 2MiB
capacity: 2MiB
capabilities: burst internal write-back unified
*-cache
description: L3 cache
physical id: 7
slot: L3 Cache
size: 2MiB
capacity: 16MiB
capabilities: burst internal write-back unified
*-memory
description: System Memory
physical id: 25
slot: System board or motherboard
size: 6GiB
*-bank:0
description: DIMM DDR2 Synchronous 533 MHz (1.9 ns)
physical id: 0
slot: Slot-1
size: 2GiB
width: 40968 bits
clock: 533MHz (1.9ns)
*-bank:1
description: DIMM DDR2 Synchronous 533 MHz (1.9 ns)
physical id: 1
slot: Slot-3
size: 1GiB
width: 41480 bits
clock: 533MHz (1.9ns)
*-bank:2
description: DIMM DDR2 Synchronous 533 MHz (1.9 ns)
physical id: 2
slot: Slot-2
size: 2GiB
width: 41992 bits
clock: 533MHz (1.9ns)
*-bank:3
description: DIMM DDR2 Synchronous 533 MHz (1.9 ns)
physical id: 3
slot: Slot-4
size: 1GiB
width: 42504 bits
clock: 533MHz (1.9ns)
Solution 3:
Try
sudo dmidecode --type 17
# dmidecode 2.9
SMBIOS 2.4 present.
Handle 0x0018, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0017
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: DIMM
Set: None
Locator: J6H1
Bank Locator: CHAN A DIMM 0
Type: DDR2
Type Detail: Synchronous
Speed: 800 MHz (1.2 ns)
Manufacturer: 0x2CFFFFFFFFFFFFFF
Serial Number: 0x00000000
Asset Tag: Unknown
Part Number: 0x5A494F4E203830302D3247422D413131382D
Handle 0x001A, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0017
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: J6H2
Bank Locator: CHAN A DIMM 1
Type: DDR2
Type Detail: None
Speed: Unknown
Manufacturer: NO DIMM
Serial Number: NO DIMM
Asset Tag: NO DIMM
Part Number: NO DIMM
If type 17 doesn't do it for you, you could try one of the other memory types listed here, e.g. 6 or 37.