Date: Wed, 7 Jul 1999 18:49:51 +0900 (JST) From: ohashi@mickey.ai.kyutech.ac.jp (Takeshi OHASHI) To: ycheng@sinica.edu.tw Cc: freebsd-hackers@freebsd.org, ohashi@mickey.ai.kyutech.ac.jp Subject: Re: DVD-ram Message-ID: <199907070949.SAA02232@atohasi.mickey.ai.kyutech.ac.jp> In-Reply-To: Your message of "Wed, 7 Jul 1999 15:45:33 JST". <19990707064533.29253.qmail@phi.sinica.edu.tw>
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ycheng>>In article <199907070339.VAA88466@panzer.kdm.org> you wrote: ycheng>>>> 3.5" 650MB and 1.3GB MO drives should handle 512KB/sector(128MB, ycheng>>>> 230MB, 540MB) and 2048KB/sector media(640MB, 1.3GB). Ofcouse, my typo: 512KB/sector -> 512B/sector, 2048KB/sector -> 2048B/sector ycheng>>> The CAM DA driver was specifically designed to handle various sector sizes, ycheng>>> and should work fine with non-512 byte sector sizes. If it doesn't, it ycheng>>> needs to be fixed. ycheng>>I use "Mitsubishi MCA 640" with Tekram 390F scsi card. ycheng>>I guess one of error message is from ycheng>> ycheng>>/usr/src/sys/kern/subr_diskslice.c ycheng>> line 308 (or line 314, I am not very sure) ycheng>> which is: ycheng>> "dscheck: b_bcount %ld is not on a sector boundary (ssize %d)\n" ycheng>> ycheng>>I think this can help you to find why we say that 2048/sector won't work. Thanks. But that was disklabel or slice problem. And also current ffs and msdosfs need some patches for 2048 sector media. -- Takeshi OHASHI ohashi@mickey.ai.kyutech.ac.jp ohashi@jp.FreeBSD.ORG To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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