On Fri, Aug 28, 2009 at 7:03 AM, Götz Reinicke - IT-Koordinator<goetz.reinicke at filmakademie.de> wrote: > 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 You have to smack mkfs around a bit to get it to work. The incantations are listed here, along with the various limitations. The long and short of it is that you have to use -F to tell mkfs that you're really, REALLY sure. http://www.bofh-hunter.com/2008/02/11/large-filesystem-creation/ -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell