Dan Pritts wrote:|
On Fri, Apr 29, 2005 at 04:35:02PM -0400, Guido Vettoretti wrote:32-bit machines: ext3 : 2Tb (I managed to create a 4TB fs for some reason)
I haven't heard anything about the new versions but I was workiing with kernel 2.6.9, and the number of block groups would roll over to 0 when I specified a number greater than 32768. Thus the max limitation seemes to be 4096(bytes/block)*32768(blocks/group)*32768(blockgroups) = 4TBI'm not sure this is true - i think that this limit was there but was removed in newer versions of ext2/3
[root cyclone ~]# mkfs -t ext3 /dev/vol0/lvol0 mke2fs 1.35 (28-Feb-2004) max_blocks 4294967295, rsv_groups = 0, rsv_gdb = 1024 Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 512016384 inodes, 1024002048 blocks 8250429 blocks (0.81%) reserved for the super user First data block=0 Maximum filesystem blocks=1027604480 31251 block groups 32768 blocks per group, 32768 fragments per group
This is useful info,ext3: 2Tb (? not sure about this one)I have created larger filesystems on 64-bit.One of the hardware support people said there was a 2Tb limit on the SCSI protocol (not sure about this),More or less true, but some newer hardware and device drivers have fixed this. The keyword you need to look for is "64-bit LBA". I've had success with an Atto celerity fibre channel adapter and an infortrend-based RAID on x86_64. However, each one needed a firmware/driver update from what was shipped to me in December of last year to work.