Hi, all! I want to change current RHEL 4.0 ES into CentOS 4.2 on Sun X4100 server. The server has SAS SCSI based two 2.5" hard disks. I could only install RHEL 4.0 Update 1 because the server is equipped with RHEL 4.0 Update 1's device driver only. I've included below the boot process messages concerned with SCSI controller. If it's possible for me to install CentOS 4.0 on my X4100, I am ready to switch to it. TIA Sungsoo Kim ------------------- SCSI subsystem initialized Fusion MPT base driver 3.02.18 Copyright (c) 1999-2005 LSI Logic Corporation ACPI: PCI interrupt 0000:02:03.0[A] -> GSI 28 (level, low) -> IRQ 209 mptbase: Initiating ioc0 bringup ioc0: SAS1064: Capabilities={Initiator} Fusion MPT SCSI Host driver 3.02.18 scsi0 : ioc0: LSISAS1064, FwRev=01040000h, Ports=1, MaxQ=203, IRQ=209 Vendor: FUJITSU Model: MAV2073RCSUN72G Rev: 0301 Type: Direct-Access ANSI SCSI revision: 04 SCSI device sda: 143374738 512-byte hdwr sectors (73408 MB) SCSI device sda: drive cache: write through sda: sda1 sda2 sda3 Attached scsi disk sda at scsi0, channel 0, id 2, lun 0 Vendor: FUJITSU Model: MAV2073RCSUN72G Rev: 0301 Type: Direct-Access ANSI SCSI revision: 04 SCSI device sdb: 143374738 512-byte hdwr sectors (73408 MB) SCSI device sdb: drive cache: write through sdb: sdb1 Attached scsi disk sdb at scsi0, channel 0, id 3, lun 0