On 6/7/07, Benjamin Karhan <simon at pop.psu.edu> wrote: > > i'm trying to set up a hardware RAID array (eRAID from DatOptic) > under CentOS. we have two more of these arrays which have worked > very well for their purposes (backup and/or portable storage), but > neither of our older arrays exceeded the dreaded 2TB barrier > (one of them is, in fact, 2TB). Some raid devices themselves have a 2TB limit, and you either have to enable spanning on the raid card, or use the OS to work around this. > 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. You used parted and set the partition type as GPT right? If it's not GPT, then you'll hit the 2TB limit with the filesystem. > Disk geometry for /dev/sda: 0.000-2097128.999 megabytes > Disk label type: gpt > Minor Start End Filesystem Name Flags Yep, seems you're using GPT. What filesystem are you using for this? I didn't see that informaiton in the provided info, unless I overlooked it. > it's important that we get full use of the array (1TB is a lot of > space to waste). > anyone have any ideas, suggestions, comments, or criticisms? > any help would be greatly appreciated... Very much so. Worst case I'd say split it up into 1TB chunks and use LVM to join them all. -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell