+- DC-SWAT Forum (http://www.dc-swat.ru/forum)
+-- Форум: Sega Dreamcast (/forum-2.html)
+--- Форум: English section (/forum-29.html)
+--- Тема: Little question about GD dump (/thread-1473.html)
Little question about GD dump - TuxTheWise - 29.01.2011 19:50
GD's data tracks, as CD's, have some kind of checksum to prevent wrong read. So if some sector doesn't match with the checksum, the reader reads it again, and again, until reads it right.
When dumping a GD on DreamShell, is this redundancy info checked? I mean, if some read is corrupted, it tries to read again? Or there is a (significant) chance of reading corrupted data?
I believe this kind of verification is at the hardware level, but I'm just checking to be sure.
Thanks.
RE: Little question about GD dump - SWAT - 29.01.2011 22:57
If reading GD fails, it will be another 10 attempts to read the sector. If the error is not passed, the sector is skipped.
RE: Little question about GD dump - TuxTheWise - 30.01.2011 09:53
(29.01.2011 22:57)SWAT писал(а): If reading GD fails, it will be another 10 attempts to read the sector. If the error is not passed, the sector is skipped.
Does DS output some kind of warning when that skip is made?
RE: Little question about GD dump - SWAT - 30.01.2011 11:02
DS_ERROR: Can't read sector: %d
DS_PROCESS: Retry reading...
... 10 times
DS_ERROR: Can't read sector: %d
DS_PROCESS: Skip sector: %d