Equipment Support > Hardware By Brand > Cisco > [H/W] Anyone out there with an 891?

[H/W] Anyone out there with an 891?

rommon 1 > meminfo
Main memory size: 256 MB.
Available main memory starts at 0x80018000, size 262048 KB
IO (packet) memory size: 10 percent of main memory
NVRAM size: 256 KB
rommon 2 > 
 

According to Cisco, the default memory is 512. Base memory is 256, so your SODIMM might be bad, or need reseating.

My SODIMM slot is empty. I checked the specs and found the same as you.

I've had the router for a few years now, so unless I'm a victim of a very clever thief, it must have 512mb on the board.

I don't have one to take apart, so I'll go with what Cisco currently says... 256 base + 256 SODIMM standard. This may not have always been the case, of course. The 892 has 512 based, so you may have an 892 or they used an 892 base for your 891.

(Note: the 1760 was like that... base 1760 was 64, 1760-V had 128 -- they soldered two more chips on it. I "upgraded" mine )

»www.cisco.com/en/US/docs/routers···FRU.html

What are the numbers on the 4 chips next to the SODIMM socket? Those appear to be the RAM. And all 4 are populated.

Was there any outage around the time the memory "went missing"???

Yeah, I had unplugged it as a precaution when I discovered that the sprinkler main immediately on the other side of the wall had burst, and filled the apartment next door with 2 inches of water (oh the joys of living in the north...). Nothing of mine got wet, just powered down, and it never booted back up

The chip are Micron 9SF12 D9JLR, I would assume they are RAM also.

MT47H32M16HR-3:F == 8 Meg x 16 x 4 banks (512Mb)

So that's 256MB onboard. It either didn't have a SODIMM, or someone along the line walked off with it. Cisco's hardware DB should be able to tell you how it left the factory.

Hardware DB? I'm not familiar with that cisco tool.

Either there are 4 more chips on the board somewhere that I can't find (perhaps on the bottom), I have an SODIMM that vaporized.

Used to be part of the contract / serial number lookup tool, but they locked that down years ago. They have a database of every serial number they've ever sold. (I don't know how far back they keep it, 'tho.)

reply to Paulg
The way I'm interpreting the datasheet