Hello Changing the modes is not data destructive, but if you do any writes to the drives in a different mode than what the data was originally written it can overwrite the old data. Thanks
I just installed a BIOS upgrade on a Dell R510 server and after reboot there is no boot devise. the SATA setting were cleared. If I set the SATA controller to ATA mode i get a warning that Data loss will occur. Will I loose my files if I proceed ?
Dell PE R510 BIOS upgraded wiped SATA config