Slackware Linux 8.0 gave the following errors in /var/log/messages when I attempted to connect a PCMCIA CD-ROM drive to my Hitachi Traveler notebook:

modprobe: Can't locate module ide_cs
get dev info on socket 0 failed: Resource temporarily unavailable

The problem was with the file /etc/pcmcia/config, in which the incorrect module name was referenced: ide_cs instead of ide-cs. To correct the problem, edit /etc/pcmcia/config, replace all occurences of ide_cs with ide-cs, and restart the card services manager:

# cd /etc/pcmcia
# ed config
# killall -1 cardmgr