Hi I have been fighting my problem with system freezes described in the previous thread I have added a 2nd NIC to the machine and tested across an NFS mount using md2sum as before The machine now has An on board Marvell 8380 GB/s nic that uses the sky2 driver A D-Link 530T GB/s nic that uses the skge driver I am using a Netgear GS108T GB/s switch to a Centos 5.4 nfs4 server. The machine is booted with only one NIC connected at a time D-link Marvell F11 OK OK F12 OK Fails Fails = Hardware button press required after "random" time during read/checksum calc of 8GB file set My conclusion was that it must be the F12 sky2 driver not NFS I then down loaded the latest "Working" F11 kernel source rpm and extracted sky2.c and sky2.h and compiled these against the F12 kernel I thought this must fix the problem - but no! The machine still freezes during the md5sum test I am rapidly running out of ideas !! Any help appreciated John -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines