On Wednesday September 28, jlb17@xxxxxxxx wrote: > On Wed, 28 Sep 2005 at 10:56am, Neil Brown wrote > > > On Tuesday September 27, lfarkas@xxxxxxxxx wrote: > > >> suppose i create the raid device with: > >> mdadm --create /dev/md0--level=5 --raid-devices=8 --spare-devices=1 > >> /dev/sd[abcdefgh]1 > >> then what is the maximum size for /dev/md0? > >> (or more precisely after a mkfs.ext3 /dev/md0). > > > > The /dev/sdX1 cannot be larger than 2TB. The /dev/md0 can be as big > > as you like. The filesystem can be as big as your filesystem allows. > > I don't think ext3 can exceed 2 TB (I could be wrong). Other > > RH (e.g.) officially supports ext3 FSs up to 8TB in RHEL4. See... I was wrong! :-) I'm sure there is a 32bit limit somewhere, so it's probably that block addresses are limited to 32 bits. With 4K blocks, that's 2^34 K, or 16TB.... Maybe there is some confusion with the sign bit, making it on 2^33K, or 8TB. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
