SDLD algorithm

[selftest]

Hi everybody,
Through Seagate user manual, in chapter 6.2 The "Tools" --> "Utillity extensions" menu, i saw term "SDLD, block checksum". Who can tell me what SDLD algorithm is, or any document about SDLD algorithm ?

Thank you very much.

[guru]

That is something that you will need to reverse yourself :@)

[selftest]

Hi Guru,
Thanks for your reply.
With checksum formula in WD HDD, or Seagate (byte sum, word sum) i can understand but with SDLD, this is a problem. Any advice for me ?

[Vorian]

The algorithm is known and was published on a russian forum

http://www.lmgtfy.com/?q=%D1%81%D0%B4%D0%BB%D0%B4+xor

[selftest]

The algorithm is known and was published on a russian forum

http://www.lmgtfy.com/?q=%D1%81%D0%B4%D0%BB%D0%B4+xor

Oh, Thanks a lot for your sharing.
I will try to understand Russian.

Thanks again.

[selftest]

Hi Vorian,
Thanks a lot of for your sharing, i will try to understand Russian forum.

[guru]

That spoils the fun of learning :@(

[selftest]

Hi guru,
I have spend 1 week for SDLD algorithm to analyze, and the result is still zero. Have a lot of checksum algorithm but with SDLD, this is the first i hear about it. (

[guru]

http://forum.ru-board.com/topic.cgi?for ... &start=400

Looks good also talks about handshake ;@) which is required

[selftest]

Thanks Vorian and guru again, i understood it. If you didn't tell about it for me, maybe i drop out.