On Tue, Jul 19, 2005 at 12:28:43PM -0400, Robin Mordasiewicz wrote:

Does anyone know the raw device size limitation with CentOS-3 and CentOS-4

centos 3 (kernel 2.4) will probably have a 2TB device size limit.

centos 4 (kernel 2.6) will go much larger. Be wary, though - not only the kernel, but also your device drivers for your scsi card or whatever will need to be aware of the large device sizes. Your RAID, too.

while using genuine RHEL 4, I ran into problems on x86_64 - my fibrechannel card's device driver had a 2TB bug, and so did the LVM stuff in the 2.6.9 kernel.

I got a new device driver from the FC vendor, and upgraded my kernel manually to 2.6.11.7 and things seemed to work properly with an LVM stripe across 2 5.5TB volumes. It is waiting to go into production due to unrelated application issues so i can't say that it has been rock solid reliable for x months but in our several-day tortue test it worked fine.

danno -- dan pritts - systems administrator - internet2 734/352-4953 office 734/834-7224 mobile