Date: Sat, 27 Oct 2012 15:10:21 -0700 From: freebsd@johnea.net To: freebsd-questions@freebsd.org Subject: Re: 9.1 and gmirror with GPT? Message-ID: <508C5BE6.4000405@johnea.net> In-Reply-To: <alpine.BSF.2.00.1210271530190.69926@wonkity.com> References: <5082EAEE.4040609@johnea.net> <50833F78.1060609@bnrlabs.com> <alpine.BSF.2.00.1210210827530.70277@wonkity.com> <5085C743.8000508@johnea.net> <alpine.BSF.2.00.1210221631250.13158@wonkity.com> <5086C7EB.9020104@johnea.net> <alpine.BSF.2.00.1210231837130.21493@wonkity.com> <508C2043.8070205@johnea.net> <alpine.BSF.2.00.1210271530190.69926@wonkity.com>
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On 2012-10-27 14:41, Warren Block wrote:
> On Sat, 27 Oct 2012, freebsd@johnea.net wrote:
>
>> On 2012-10-23 17:46, Warren Block wrote:
>>> On Tue, 23 Oct 2012, freebsd@johnea.net wrote:
>> orsbackup# gpart add -t freebsd -a 4k mirror/gm0
>> mirror/gm0s1 added, but partition is not aligned on 4096 bytes
>
> This is new to me, I have not seen it before. I had the impression that gpart put the bsdlabel partition table at a misaligned offset so that the actual filesystems in those partitions would land on an aligned block, but it never gave that message. That comes from sys/geom/part/g_part.c, function g_part_ctl_add which starts at line 645:
>
> 743 /* Provide feedback if so requested. */
> 744 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) {
> 745 sb = sbuf_new_auto();
> 746 G_PART_FULLNAME(table, entry, sb, gp->name);
> 747 if (pp->stripesize > 0 && entry->gpe_pp->stripeoffset != 0)
> 748 sbuf_printf(sb, " added, but partition is not "
> 749 "aligned on %u bytes\n", pp->stripesize);
> 750 else
> 751 sbuf_cat(sb, " added\n");
> 752 sbuf_finish(sb);
> 753 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
> 754 sbuf_delete(sb);
> 755 }
> 756 return (0);
>
Thanks Warren!
I ended up just ignoring the not aligned warning from the "gpart add -t freebsd" and went on to add the freebsd-swap and freebsd-ufs partitions with "-a 4k" option.
Do you think I'm aligned?
Thanks!
johnea
orsbackup# gpart create -s BSD mirror/gm0s1
mirror/gm0s1 created
orsbackup# gpart add -t freebsd-swap -a 4k -s 8g mirror/gm0s1
mirror/gm0s1a added
orsbackup# gpart add -t freebsd-ufs -a 4k mirror/gm0s1
mirror/gm0s1b added
orsbackup# gpart bootcode -b /boot/mbr mirror/gm0
bootcode written to mirror/gm0
orsbackup# gpart set -a active -i 1 mirror/gm0
active set on mirror/gm0s1
orsbackup# gpart bootcode -b /boot/boot mirror/gm0s1
bootcode written to mirror/gm0s1
orsbackup#
orsbackup# gpart show
=> 63 3907029105 ada0 MBR (1.8T)
63 63 - free - (31k)
126 3906994077 1 freebsd [active] (1.8T)
3906994203 34965 - free - (17M)
=> 0 3906994077 ada0s1 BSD (1.8T)
0 3890216960 1 freebsd-ufs (1.8T)
3890216960 16777116 2 freebsd-swap (8G)
3906994076 1 - free - (512B)
=> 63 3907029104 mirror/gm0 MBR (1.8T)
63 63 - free - (31k)
126 3907028979 1 freebsd (1.8T)
3907029105 62 - free - (31k)
=> 0 3907028979 mirror/gm0s1 BSD (1.8T)
0 2 - free - (1.0k)
2 16777216 1 freebsd-swap (8.0G)
16777218 3890251760 2 freebsd-ufs (1.8T)
3907028978 1 - free - (512B)
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