Disk question

[Gannater János]

Hello,

Why I booted my computer the following error came up:
ad1s1a: UDMA ICRC error reading fsbn 6144095 of 16-31 (ad1s1 bn 
6144095; cn 6095 tn 5 sn 20) retrying
ad1s1a: UDMA ICRC error reading fsbn 6144095 of 16-31 (ad1s1 bn 
6144095; cn 6095 tn 5 sn 20) falling back to PIO mode
Is there a way to fix these disk errors?

Another question;
What does it mean if after a Connection attempt I see: flags:0x02


Thanks,
	Janos