Red Hat Enterprise Linux 6.0 installation fails on IBM P750 (ppc64) machine

Issue

• The installation panics before anaconda loads with a ramdisk uncompression error :

  Initializing XFRM netlink socket                                                
  NET: Registered protocol family 17                                              
  registered taskstats version 1                                                  
  rtc-generic rtc-generic: setting system clock to 2010-12-22 23:04:21 UTC (12930)
  Initalizing network drop monitor service                                        
  md: Waiting for all devices to be available before autodetect                   
  md: If you don't use raid, use raid=noautodetect                                
  md: Autodetecting RAID arrays.                                                  
  md: Scanned 0 and added 0 devices.                                              
  md: autorun ...                                                                 
  md: ... autorun DONE.                                                           
  RAMDISK: gzip image found at block 0                                            
  RAMDISK: EOF while reading compressed data                                      
  uncompression error                                                             
  List of all partitions:                                                         
  No filesystem could mount root, tried:  iso9660                                 
  Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)  
  Call Trace:                                                                     
  [c000000ed5ddfc30] [c000000000012d84] .show_stack+0x74/0x1c0 (unreliable)       
  [c000000ed5ddfce0] [c000000000582b50] .panic+0x80/0x1a8                         
  [c000000ed5ddfd70] [c0000000007f14c8] .mount_block_root+0x2e8/0x324             
  [c000000ed5ddfe50] [c0000000007f1750] .prepare_namespace+0x1c4/0x218            
  [c000000ed5ddfee0] [c0000000007f0520] .kernel_init+0x2f4/0x320                  
  [c000000ed5ddff90] [c000000000031b14] .kernel_thread+0x54/0x70                  
  Rebooting in 180 seconds..