Date: Sun, 08 Jul 2018 11:02:30 +0200 From: "Ronald Klop" <ronald-lists@klop.ws> To: freebsd-fs@freebsd.org, "Manish Jain" <jude.obscure@yandex.com> Subject: Re: A request for unnested UFS implementation in MBR Message-ID: <op.zltsqgb0kndu52@klop.ws> In-Reply-To: <98201d37-2d65-34c6-969e-c9649f1a3ab1@yandex.com> References: <98201d37-2d65-34c6-969e-c9649f1a3ab1@yandex.com>
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On Sat, 07 Jul 2018 07:59:55 +0200, Manish Jain <jude.obscure@yandex.com> wrote: > Hi all, > > I am a longtime user of FreeBSD, which now serves as my only OS. > > There is one request I wished to make for FreeBSD filesystems. While UFS > implementation under GPT is unnested just as Ext2, the MBR > implementation of UFS continues to piggyback on an unnecessary nest (in > a BSD slice). > > Can it not be considered as an alternative to provide a UFS partition > (unnested) under MBR too ? > > Existing users could continue to use the freebsd::freebsd-ufs scheme, > while fresh usage could have the alternative of UFS directly recorded in > the MBR. > > I should perhaps note that unlike most users who have shifted to GPT of > late, I much prefer MBR because 1) the scheme's design by itself keeps > the number of slices/partitions in a disk manageable; and 2) I can use > the boot0 manager, my favourite boot manager. > > Thanks for reading this. > Manish Jain Do you mean something like this? Gpart refuses to create a freebsd-ufs partition in the MBR part. # mdconfig -s 512m md0 # gpart create -s MBR md0 md0 created # gpart add -t freebsd-ufs -s 256m md0 gpart: Invalid argument # gpart add -t freebsd-swap -s 256m md0 gpart: Invalid argument But you can create and newfs other types. # gpart add -t linux-data -s 256M md0 md0s1 added # newfs /dev/md0s1 /dev/md0s1: 256.0MB (524288 sectors) block size 32768, fragment size 4096 using 4 cylinder groups of 64.03MB, 2049 blks, 8320 inodes. super-block backups (for fsck_ffs -b #) at: 192, 131328, 262464, 393600 # gpart add -t freebsd md0 md0s2 added # newfs /dev/md0s2 /dev/md0s2: 256.0MB (524272 sectors) block size 32768, fragment size 4096 using 4 cylinder groups of 64.00MB, 2048 blks, 8192 inodes. super-block backups (for fsck_ffs -b #) at: 192, 131264, 262336, 393408 Interesting. I don't why this is. Regards, Ronald.
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