On 09/16/13 11:10 AM, Jeff Johnson wrote:

> Well, it happened again. He printed fine for one week and this week it

> did the same thing of dropping lines and not resetting fonts. Again,

> the text file is perfectly formatted, but the print out is not right. I

> am having him check the power saving settings and make sure they are

> turned off.

The first time, I mentioned the likelihood of a problem with Virtual

Memory. The way spooling works, the text file is read in in its

entirety and then parcelled out to the printer. Where is it read into?

RAM, which means with a large file it goes to the VM swapfile.

If you have an intermittent problem with the disk the swapfile is on,

then you could easily save part of the spool and fail on the read that

tries to bring it back, which would cause exactly what you're seeing -

missing pieces of the printout.

AFAIK, the VM (swapfile) is cleared out completely ONLY on a restart.

If the allocation tables on the VM get munged, the problem will continue

until you reboot. I note that when you reboot the problem goes away

(for a time).

I would look at the SMART data for the disk drive the VM is on.

I use DiskCheckup (v3.1) from PassMark, free for personal use.

Gives you lots of very useful numbers (including number of boots,

powerups, etc. etc.

Dan Covill

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