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Re: kern/42573: DIRBLKSIZ in <ufs/ufs/dir.h> should not beDEV_BSIZE constant

The following reply was made to PR kern/42573; it has been noted by GNATS.

From: Izumi Tsutsui <>
Subject: Re: kern/42573: DIRBLKSIZ in <ufs/ufs/dir.h> should not beDEV_BSIZE
Date: Mon, 4 Jan 2010 03:51:19 +0900

 >  My thoughts are the DEV_BSIZE should remain forever as 512
 >  (cygwin fubar not withstanding).
 Probably we need to have some macro which represent
 "traditional sector size (which is 512)",
 but I don't think we should keep it as DEV_BSIZE.
 Anyway we can't use DEV_BSIZE in src/tools as mentioned in
 PR toolchain/42555 and toolchain/42574.
 >  But to make everything fit (eg i386 boot code) the byte alignments
 >  cannot change - the label has to remain in bytes 512-1203.
 Does it? What about "LABELSECTOR" in <machine/disklabel.h>?
 Shouldn't sys/arch/i386/stand/mbr/mbr.S be sector size aware?
 >  (I have a USB memory stick with 2k sectors, the 0x55, 0xaa are in
 >  bytes 510 and 511 as usual.)
 Magic should be at MBR_MAGIC_OFFSET defined in <sys/bootblock.h>
 so it doesn't matter of sector size, does it?
 Anyway, these are different topic from this PR.
 Izumi Tsutsui

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