I can't boot kernel-2.6.17-1.2139 it hangs at:- device-mapper: 4.6.0-ioctl (2006-02-17) When it hang the screen on monitor looks identical to kernel-2.6.16-1.2133_FC5 dmesg entry except version of device-mapper:- SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: drive cache: write back SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB) sda: Write Protect is off sda: Mode Sense: 00 3a 00 00 SCSI device sda: drive cache: write back sda: sda1 sda2 sd 0:0:0:0: Attached scsi disk sda Vendor: ATA Model: WDC WD1600SD-01K Rev: 08.0 Type: Direct-Access ANSI SCSI revision: 05 SCSI device sdb: 312581808 512-byte hdwr sectors (160042 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back SCSI device sdb: 312581808 512-byte hdwr sectors (160042 MB) sdb: Write Protect is off sdb: Mode Sense: 00 3a 00 00 SCSI device sdb: drive cache: write back sdb: unknown partition table sd 1:0:0:0: Attached scsi disk sdb device-mapper: 4.6.0-ioctl (2006-02-17) initialised: dm-devel@xxxxxxxxxx System:- Motherboard ASUS A7V8X AMD Athlon 2200+ 1GB ram Promise PDC20376 (FastTrak 376) BIOS defined RAID 0 on pair of 160GB Western Digital drives Have to use kernel-2.6.16-1.2133_FC5 for now!! --Andrew Gray