I'm unable to install beta 2 when the installation partition has been previously formatted FAT32. No matter if I try to reformat with HPFS or JFS, the format fails. The message is different for HPFS and different for JFS. The message for HPFS specifically says HPFS, but I believe that is the matter of wording. SYS0540 is for HPFS and SYS0528 for JFS. There is another message following the fist one, but only the beginning is visible as there is only 1 line for messages (this small window for messages should also be addressed as an issue). The message is the same for both HPFS and JFS: SYS1311 The system... (this is all that's visible). The partition size is only 20 GB and JFS should handle far more than FAT32 anyway.

This should not be related to bug 3690 as the partitions on that hard drive can be successfully formatted when connected to a non-SATA3 controller operating in IDE mode (that's how the system is booted). I don't want to pre-format the installation partition when booted from another disk as the format should work regardless of what the existing file systems is. Another partition (2 GB only) on the same disk pre-formatted with FAT can be successfully formatted again during installation time, so this makes me think it's the existing FAT32 format that is the problem.

I'm unable to install beta 2 on a system based on Gigabyte 770TA-UD3 motherboard when a hard drive is connected to SATA3 controller. Short format sometimes works, but long format fails or (more often) never completes producing periodic beeps. Occasionally, the installation will hang on detecting disks, but most often it is the long format that will never complete.
Additional Information To troubleshoot the issue I installed beta 2 on an old SCSI disk to have an operating environment to troubleshoot. When booted from that disk (to bypass SATA/IDE drivers altogether) I could issue format command from a window. When I try to format any partition on a disk connected to SATA3 controller the error message keeps coming every few seconds accompanied by a beep: "Internal error: devices.c(532): Write error 31 (GEN_FAILURE)". This will never stop, even if format is left running for many hours.
When the SATA3 controller mode is changed from AHCI to IDE, the disk is not even visible under eCS. I guess Dani's driver cannot operate SATA3 controller in IDE mode. When I connect the disk to another SATA controller (not SATA3) and I change the mode to IDE, I can format any partition without any issue, which clearly points to a problem with AHCI driver.