I have a 4.8TB RAID device attached to a FC3 system via SCSI. The system recognizes a RAID LUN volume of 2.1TB or less without any problem. When I configure the RAID as a full 4.8TB LUN, the kernel fails to recognize its actual size and gives the following message on boot and initialization of the aic7xxx driver: -- scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36 <Adaptec 3960D Ultra160 SCSI adapter> aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs scsi1:A:4:0: DV failed to configure device. Please file a bug report against th is driver. (scsi1:A:4): 80.000MB/s transfers (40.000MHz, offset 24, 16bit) Vendor: NEXSAN Model: ATAboy(C0A82A0F) Rev: 4032 Type: Direct-Access ANSI SCSI revision: 04 scsi1:A:4:0: Tagged Queuing enabled. Depth 4 sdc : very big device. try to use READ CAPACITY(16). sdc : READ CAPACITY(16) failed. sdc : status=0, message=00, host=5, driver=00 sdc : use 0xffffffff as device size SCSI device sdc: 4294967296 512-byte hdwr sectors (2199023 MB) SCSI device sdc: drive cache: write back -- Then the reported size of the drive is truncated to 2.1TB, see above. The system is a dual processor 3.0GHz Xeon server running kernel 2.6.9-1.681_FC3smp. The system is a stock FC3 install with updates. In the kernel source, the config file, kernel-2.6.9-i686-smp.config, shows that LBD is in fact enabled. CONFIG_LBD=y Are there any other settings to enable the kernel to properly recognize a large block device? Any ideas or suggestions of things to try or check? Thanks, Randall -- ..:.:::: Randall Jones GST NASA Goddard Space Flight Center NCCS/HPC Visualization Support http://hpcvis.gsfc.nasa.gov Scientific Visualization Studio http://svs.gsfc.nasa.gov Randall.A.Jones@xxxxxxxxxxxxx Code 933 301-286-2239