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From: "T.katayama" <valcyrie@h2.dion.ne.jp>
Date: Tue, 06 Nov 2001 23:07:06 +0900
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Subject: [FreeBSD-users-jp 65410] Re: DVDRAM newfs wtfs - writecombine
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$BJR;3!w$H!<$7$P$G$9(B

Hidetoshi Shimokawa $B$5$s$O=q$-$^$7$?(B:
	(snip)
|$B%O!<%I%&%'%"$NLdBj$8$c$J$$$H$9$k$H(B, sector size $B$NLdBj$G$7$g$&$+$M(B.
|newfs $B$9$k$H$-$K(B fragment size $B$r(B 2KB $B0J>e$K$7$F$_$F$O$I$&$G$7$g$&$+(B?

$B$H$$$&$3$H$G;n$7$F$_$^$7$?$,!$(B

% sudo newfs -f 8192 acd0a
Warning: Block size and bytes per inode restrict cylinders per group to 27.
Warning: 16 sector(s) in last cylinder unallocated
/dev/acd0a:     9175024 sectors in 560 cylinders of 1 tracks, 16384 sectors
        4480.0MB in 21 cyl groups (27 c/g, 216.00MB/g, 6848 i/g)
super-block backups (for fsck -b #) at:
write error: 9175032
Nov  6 22:42:29 sylpheed /kernel: acd0: WRITE_BIG - ILLEGAL REQUEST asc=21 ascq=00 error=02
newfs: wtfs - writecombine: Input/output error
%
% sudo newfs -f 4096 acd0a
Warning: Block size and bytes per inode restrict cylinders per group to 17.
Warning: 8 sector(s) in last cylinder unallocated
/dev/acd0a:     9175032 sectors in 560 cylinders of 1 tracks, 16384 sectors
        4480.0MB in 33 cyl groups (17 c/g, 136.00MB/g, 8640 i/g)
super-block backups (for fsck -b #) at:
write error: 9175032
Nov  6 22:42:32 sylpheed /kernel: acd0: WRITE_BIG - ILLEGAL REQUEST asc=21 ascq=00 error=02
newfs: wtfs - writecombine: Input/output error
%
% sudo newfs -f 2048 acd0a
Warning: Block size and bytes per inode restrict cylinders per group to 10.
Warning: 4 sector(s) in last cylinder unallocated
/dev/acd0a:     9175036 sectors in 560 cylinders of 1 tracks, 16384 sectors
        4480.0MB in 56 cyl groups (10 c/g, 80.00MB/g, 10112 i/g)
super-block backups (for fsck -b #) at:
write error: 9175032
Nov  6 22:43:29 sylpheed /kernel: acd0: WRITE_BIG - ILLEGAL REQUEST asc=21 ascq=00 error=02
newfs: wtfs - writecombine: Input/output error

$B7k2L!$JQ2=$J$7$G$7$?!%(B
$B%O!<%I%&%'%"$NLdBj$+$r@Z$jJ,$1$k$?$a$K!$$b$&0lBfGc$o$J$$$H$$$1$J$$$h$&$G$9$M!%(B
$B$$$:$l$K$7$m!$Dj4|%P%C%/%"%C%W$K;Y>c$"$j$9$.$J$N$G!%(B

>Nov  6 22:43:29 sylpheed /kernel: acd0: WRITE_BIG - ILLEGAL REQUEST asc=21 ascq=00 error=02
$B$3$l$H!$(Bsys/dev/ata/atapi-all.[c|h] $B$rFI$s$@46$8$O!$(B

/* error register bits */
#define ATAPI_E_MASK                    0x0f    /* error mask */
#define ATAPI_E_ILI                     0x01    /* illegal length indication */
#define ATAPI_E_EOM                     0x02    /* end of media detected */
#define ATAPI_E_ABRT                    0x04    /* command aborted */
#define ATAPI_E_MCR                     0x08    /* media change requested */

end of media detected $B$,=P$F$$$k$h$&$K8+$($k$N$G!$$d$O$j%I%i%$%V$NLdBj$N$h$&$J5$$,$7$F$-$^$7$?!%(B

--
