Hex Code question

[aynz]

More of a learning exercise than anything else but I am currently cloning a Seagate ST3500820AS drive in PC3K UDMA and it all seems to be going well but a quick look at some random sectors is giving me this

Code:

0x0000   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0010   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0020   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0030   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0040   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0050   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0060   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0070   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0080   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0090   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x00A0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x00B0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x00C0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x00D0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x00E0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x00F0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0100   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0110   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0120   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0130   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0140   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0150   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0160   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0170   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0180   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x0190   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x01A0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x01B0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x01C0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x01D0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x01E0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww
0x01F0   77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77   wwwwwwwwwwwwwwww


What does this relate to? I don't think I have seen it before.

[slack]

Is one normal patern like "00" but in this case ""77", but why do you make image for one case like this? If is full with this clear that is no data there.

[aynz]

Thanks for the answer slack, the drive does have data on it just nearing the end of the clone (forward clone) and noticed that this was coming up so it makes sense now that you have explained it, thanks for that

[slack]

Maybe it was used with one RAID controller which use this pattern "77" to fill the drive before to format or when drive is initialized.

[aynz]

As far as the client told me it was from an external enclosure, single drive no unusual config, but we all know that you cannot take that as gospel . I thought it could be related to encryption hence why I was curious, I guess I will know when I attempt data recovery from the clone but I think it should be fine.