On 11/6/07, abel deuring <adeuring at gmx.net> wrote: > On 06.11.2007 20:07, Mauricio Villamil wrote: > > Hello, > > > > reading the SANE Docs, I found that it is possible to set up the > Environmental variable for a larger buffer size: > > > > SANE_SG_BUFFERSIZE, I have my RICOH_IS420 scanner hooked uo to Fedora core > 6 and it is working well, I just want to set up the variable to a larger > size ,but I don't knoe how??, which files need editing ?? > > > You can set environment variables from a shell, i.e., a "command line" > window and start a Sane frontend from the _same_ shell, like so: > > export SANE_SG_BUFFERSIZE=131072 > xsane > > But if the scanner works fine, there should not be any need to do this. > This option is useful only in the case that a scanner stops the scan > head very often during a scan. Increasing the buffer size and thus > increasing the amount of data transferred for one read command can help > to reduce the number of such scan head stops. But I assume that a > document scanner like the IS420 does not show such scan head stops. >
you also did not say what backend you are using to drive the scanner, but you might want to check the backend's docs to see if it has a separate buffer size control. but, in general, abel is correct, you typically dont need to increase this. allan -- "The truth is an offense, but not a sin"