Depending, on how many games you have added and how big they were + your HD is, it can take up to an hour or even more.
The uLE-Failure is interesting then.
Maybe you´ve mixed 28/48Bit?!
Is your HD properlyconnected?
Take a look at the HD-Pins inside the IDE-Connector, the Pins on BBA/NWA and the connection on PS2, were you connect the NWA at.
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux