Hi there I'm configuring coss cache file system on my squid. However it doesn't work and I got a strange message in cache.log Here it is. 2008/02/28 16:56:00| Preparing for shutdown after 2 requests 2008/02/28 16:56:00| Waiting 30 seconds for active connections to finish 2008/02/28 16:56:00| FD 15 Closing HTTP connection 2008/02/28 16:56:31| Shutting down... 2008/02/28 16:56:31| FD 16 Closing ICP connection 2008/02/28 16:56:31| storeDirWriteCleanLogs: Starting... 2008/02/28 16:56:31| Finished. Wrote 1 entries. 2008/02/28 16:56:31| Took 0.00 seconds (4545.45 entries/sec). FATAL: Aiee! aio_write() returned error (22) FIXME and wrap file_write ! My squid environment is as bellow. Redhat Enterprise 5.0 running 64bit mode Squid.3-HEAD (latest) 1 ./configure --prefix=/usr/local/squid --enable-icap-client --enable-storeio=coss,ufs 2 dd if=/dev/zero bs=1048576 count=1024 of=/cache/coss 3 put and changed some parameters in the squid.conf cache_dir coss /cache/ 1024 block-size=512 max-size=1048576 cache_swap_log /usr/local/squid/var/logs/%s 4 squid -z 5 start squid 6 send http packet by using wget, http_proxy="http://192.168.12.10:3128" wget -O /dev/null http://192.168.12.4/512B-7/00000000.dat 7 send again it. 8 glance the accesslog , and it's no problem. 192.168.11.31 TCP_MISS/200 837...... 192.168.11.31 TCP_MEM_HIT/200 ....... 9 shutdown the squid then strange message shows up in the cache.log and object was NEVER saved in the coss file. What should I do the next? Thank you, Seiji Kobayashi.