On Thu, 7 Jun 2007 at 8:19pm, Benjamin Karhan wrote > in fact, the kernel "USB Mass Storage" driver that detects the > array when i plug it in only detects the device as 2TB as well. > (so, it could easily be a limitation of that hardware driver, > although i couldn't find any specification for that limitation > when i googled for it). My googling seemed to indicate that, yes, the USB mass storage protocol (not just the Linux driver, but the protocol itself) is limited to 2TB per LUN. > i should say, although i dread the possible suggestions that may > arise from admitting it, that the array also supports FireWire > and SATA connections. (we are STRONGLY inclined to wanting to > use the array as USB, as our primary concern is easy portability > and not speed) I can't see anything that says Firewire has the same 2TB limitation as USB. So that's worth a shot. > the RAID array is the DatOptic eRAID, with 5 750GB disks in a > RAID-5 array. the array itself seemed to have no problem > creating the ~3TB volume, but it does not detect as that > size when i hook it up. Many such devices have an "auto-carve" feature (or some such), that automatically splits one RAID volume into <2TB chunks, each on a different LUN. If you're married to USB, see if your hardware will do that. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University