I've taken the liberty to reproduce Babelfish's translation below:
CODE
(I hope that you understand to me in Spanish)
you can use any software to unblock it (I recommend MHDD to you, but I believe that atapwd also works)
If you have password of eeprom thus something:
6A A1 B8 55 DF 71 CB D7 77 96 10 64 F5 87 A2 D7 6F CF C3 8F
you must turn that to flat text, I explain to you:
this in Hexadecimal, is necessary to turn it to DECIMAL (http://home2.paulschou.net/tools/xlate/)
in serious text something thus:
j¸UßqË×w�? dõ�¢×oÏÃ�
as this is complicated to write that because we wrote with the codes decimal:
106 161 184 85 223 113 203 215 119 150 16 100 245 135 162 215 111 207 195 143
but you do not write the numbers directly, is necessary to use:
ALT + 106
ALT + 161
ALT + 184
. etc.
with MHDD first you select UNLOCK, soon to user password, soon write the key with ALT+###
The reason to reproduce the post is it shows us how to use MHDD with hexadecimal passwords - yet another means to lock and unlock a xbox hdd. I aim to try this method soon.
QUOTE(ldotsfan @ May 6 2009, 11:17 AM)

The reason to reproduce the post is it shows us how to use MHDD with hexadecimal passwords - yet another means to lock and unlock a xbox hdd. I aim to try this method soon.
Method does not work, was unable to get MHDD to recognize the Alt key.