Hi, I'm trying to set up an iscsi 12.5 TB storage for some data backup. Doing so, I had some difficulties to find the right tool, maybe it's also a question of the system settings... The server is a 32Bit CentOS 5.3 with the recent updates. Ths iscsi connection can be establised. fdisk and parted fail to create any information on the device or fail completely. using the lvm tools (pvcreate, vgcreate, lvcreate), I could finaly create a logical volume: lvdisplay /dev/VolGroup02/lvol0 --- Logical volume --- LV Name /dev/VolGroup02/lvol0 VG Name VolGroup02 LV UUID h7T6tD-JZw2-UEdb-q1ml-BDqp-9E0u-mAop6x LV Write Access read/write LV Status available # open 0 LV Size 12,73 TB Current LE 3337487 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:4 But, I can't create a filesystem on it: mkfs.ext3 -m 2 -j -O dir_index -v -b 4096 -L iscsi2lvol0 /dev/mapper/VolGroup02-lvol0 mke2fs 1.39 (29-May-2006) mkfs.ext3: Filesystem too large. No more than 2**31-1 blocks (8TB using a blocksize of 4k) are currently supported. The limits information provided by red hat say, that RH EL 5.1 supports 16 TB filesystems: http://www.redhat.com/rhel/compare/ -> Maximum filesystem size (Ext3): 16TB in 5.1 Using a block size of 8192 gives a warning, that this size is to large for that system. So my question: What is my missunderstanding or what's wrong with my system? Where are the real limits? Do I have to switch the OS to 64 Bit? Setting up large Filesystems isn't my staff of life :-) Thanks for amy how to or help of any kind - Best regards, Götz -- Götz Reinicke IT-Koordinator Tel. +49 7141 969 420 Fax +49 7141 969 55 420 E-Mail goetz.reinicke at filmakademie.de Filmakademie Baden-Württemberg GmbH Akademiehof 10 71638 Ludwigsburg www.filmakademie.de Eintragung Amtsgericht Stuttgart HRB 205016 Vorsitzende des Aufsichtsrats: Prof. Dr. Claudia Hübner Staatsrätin für Demographischen Wandel und für Senioren im Staatsministerium Geschäftsführer: Prof. Thomas Schadt