Date: Wed, 31 Aug 2005 17:17:08 +1000 From: Norberto Meijome <freebsd@meijome.net> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: How to create *exactly* the same SLICES in different disks Message-ID: <43155974.6010507@meijome.net> In-Reply-To: <43155735.4050101@meijome.net> References: <43155735.4050101@meijome.net>
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sorry, i meant slices. i need 2 slices, exactly the same size on each of 4 disks. Norberto Meijome wrote: > Hi, > pretty simply, how do I create slices (fdisk) that are exactly the same > throughtout different drives so they can be used in a RAID5 config? > > I tried using sysinstall and typing the SAME values but they result is > always slightly off. I tried passing the values by hand, but it changes > it anyway. > > # echo "p 2 165 20964825 467427240" | fdisk -v -f- /dev/ad6 > ******* Working on device /dev/ad6 ******* > fdisk: WARNING: adjusting size of partition 2 from 467427240 to 467426295 > to end on a cylinder boundary > parameters extracted from in-core disklabel are: > cylinders=484521 heads=16 sectors/track=63 (1008 blks/cyl) > > Figures below won't work with BIOS for partitions not in cyl 1 > parameters to be used for BIOS calculations are: > cylinders=484521 heads=16 sectors/track=63 (1008 blks/cyl) > > Information from DOS bootblock is: > 1: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) > start 63, size 20964321 (10236 Meg), flag 0 > beg: cyl 0/ head 1/ sector 1; > end: cyl 317/ head 15/ sector 63 > 2: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) > start 20964825, size 467426295 (228235 Meg), flag 0 > beg: cyl 318/ head 7/ sector 1; > end: cyl 162/ head 15/ sector 63 > 3: <UNUSED> > 4: <UNUSED> > fdisk: Geom not found > > [root@cerberus] [Wed Aug 31 17:02:10 2005] > ~ > # fdisk -s /dev/ad4 > /dev/ad4: 484521 cyl 16 hd 63 sec > Part Start Size Type Flags > 1: 63 20964762 0xa5 0x80 > 2: 20964825 467427240 0xa5 0x00 > > [root@cerberus] [Wed Aug 31 17:01:35 2005] > ~ > # fdisk -s /dev/ad6 > /dev/ad6: 484521 cyl 16 hd 63 sec > Part Start Size Type Flags > 1: 63 20964321 0xa5 0x00 > 2: 20964825 467426295 0xa5 0x00 > > > Help!!! > > thanks in advance, > beto >
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