Toshiba heads compatibility / model number question

[ThomasH]

I have an toshiba drive that's in need of heads.

MK2561GSY
HDD2E84 D UL02 T

Normally, I just match the model number, and usually I don't have trouble finding a match.
For this drive however, it seems a majority of those (on ebay) have an extra letter in the model # (MK2561GSYN , MK2561GSYB , MK2561GSYD, etc.)
Usually matching the model also matches the (HDD2E84) number, but none of the "GSY*" donors match that number.

Does anyone know what last number in the model signifies?
Anyone know what really matters for heads compatibility with these? I dont remember having trouble, but never really ran into this problem with matching.

[minhbdkt]

I have an toshiba drive that's in need of heads.

MK2561GSY
HDD2E84 D UL02 T

Normally, I just match the model number, and usually I don't have trouble finding a match.
For this drive however, it seems a majority of those (on ebay) have an extra letter in the model # (MK2561GSYN , MK2561GSYB , MK2561GSYD, etc.)
Usually matching the model also matches the (HDD2E84) number, but none of the "GSY*" donors match that number.

Does anyone know what last number in the model signifies?
Anyone know what really matters for heads compatibility with these? I dont remember having trouble, but never really ran into this problem with matching.

hi ThomasH..i need firmware toshiba MK2561gsy..can you help me?