From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050909 Fedora/1.0.6-1.2.fc4 Firefox/1.0.6 Description of problem: I export a raid directory with nfs. I mount the share on the local machine or an other host. I copy 160Mb in about 90s. a normal value is 15..30s. There is no error log somewhere. If I export in async mode It copy in 5s + 12s for the sync command on the server so it should take about 17s and not 90s. Same result without raid (just a disk). I tested with a debian and kernel 2.6.13.1 and 2.4 it's the same. Debian also provide a user space nfs server. It's then take about 18s. I tried to update to your last kernel but then I have a kernel panic. Local copy on the exported directory take about "time cp -av /opt/usr /mnt/sdb1/usr5 ; time sync" 15s Installation on a dual Intel(R) Xeon(TM) CPU 3.40GHz with a RAID bus controller: LSI Logic / Symbios Logic MegaRAID (rev 07). all info for hardware at https://rhn.redhat.com/network/systems/details/hardware.pxt?sid=1005916035 Version-Release number of selected component (if applicable): kernel-utils-2.4-13.1.66.src.rpm How reproducible: Always Steps to Reproduce: 1.echo "/mnt/sdb1 xxx.xx.xx(rw,no_root_squash,sync,insecure)" >/etc/exports 2.service nfs restart 3.mount xxx.xx.xx:/mnt/sdb1 /mnt/test 4.time cp -av /opt/160MB-dir /mnt/test Actual Results: time is about 90s Expected Results: about 18s Additional info: I can not update to the latest kernel as the kernel panic
Problem solved. The scsi disks are incompatible with the back-plane. I used 5 Seagate disk and all of them add problem. With Maxtor disk it work fine. It's a strange behavior as the disk are fine under Windows (all test done). It's also not a problem with the back plane as I tested with other back plane (4 diff.). It's also not an raid card problem as i changed to std 29160 and the problem was not solved.