Date: Thu, 11 Jan 2007 15:35:25 +0200 From: Nikolay Pavlov <quetzal@zone3000.net> To: Jo Rhett <jrhett@svcolo.com> Cc: stable@freebsd.org Subject: Re: 2.4TB disk - MBR and GPT coexist? Message-ID: <20070111133525.GA12164@zone3000.net> In-Reply-To: <45A5FD8A.6080409@svcolo.com> References: <45A5FD8A.6080409@svcolo.com>
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On Thursday, 11 January 2007 at 1:04:10 -0800, Jo Rhett wrote:
> So I have a raid array of 2.4TB. And yes, I really need 2.4TB, and no
> there's no room for another set of disks to boot from.
> / 1g
> /var 16g
> /big **everything else
>
> Sysinstall recognized the drive properly and everything looked dandy
> during install. However, it turns out that fdisk and bsdlabel both just
> chopped off the last partition at 248GB. (why 248gb and not 2tb?)
>
> Reading the various mailing lists, it strikes me that I need to make
> partition 1 be normal MBR, and then use GPT to create another partition
> table in slice 2. Makes sense to me.
You need to create two arrays first, for example here is my ARECA
configuration:
Here is drives on my server:
CLI> disk info
Ch ModelName Serial# FirmRev Capacity State
===============================================================================
1 WDC WD3200YS-01 WD-WCAPD2905423 21.00M21 320.1GB RaidSet Member(1)
2 WDC WD3200YS-01 WD-WCAPD2784014 21.00M21 320.1GB RaidSet Member(1)
3 WDC WD3200YS-01 WD-WCAPD2938741 21.00M21 320.1GB RaidSet Member(1)
4 WDC WD3200YS-01 WD-WCAPD2905454 21.00M21 320.1GB RaidSet Member(1)
5 WDC WD3200YS-01 WD-WCAPD2909622 21.00M21 320.1GB RaidSet Member(1)
6 WDC WD3200YS-01 WD-WCAPD2941988 21.00M21 320.1GB RaidSet Member(1)
7 WDC WD3200YS-01 WD-WCAPD2895051 21.00M21 320.1GB RaidSet Member(1)
8 WDC WD3200YS-01 WD-WCAPD2840974 21.00M21 320.1GB RaidSet Member(1)
9 WDC WD3200YS-01 WD-WCAPD2908560 21.00M21 320.1GB RaidSet Member(1)
10 WDC WD3200YS-01 WD-WCAPD2908273 21.00M21 320.1GB RaidSet Member(1)
11 WDC WD3200YS-01 WD-WCAPD2694369 21.00M21 320.1GB RaidSet Member(1)
12 WDC WD3200YS-01 WD-WCAPD2941968 21.00M21 320.1GB RaidSet Member(1)
13 WDC WD3200YS-01 WD-WCAPD2908270 21.00M21 320.1GB RaidSet Member(1)
14 WDC WD3200YS-01 WD-WCAPD2675053 21.00M21 320.1GB RaidSet Member(1)
15 WDC WD3200YS-01 WD-WCAPD2804241 21.00M21 320.1GB RaidSet Member(1)
16 WDC WD3200YS-01 WD-WCAPD2908119 21.00M21 320.1GB RaidSet Member(1)
===============================================================================
GuiErrMsg<0x00>: Success.
And here is two arrays:
CLI> vsf info
# Name Raid# Level Capacity Ch/Id/Lun State
===============================================================================
1 ARC-1160-VOL#00 1 Raid5 25.0GB 00/00/00 Normal
2 ARC-1160-VOL#01 1 Raid5 4775.0GB 00/00/01 Normal
===============================================================================
GuiErrMsg<0x00>: Success.
The first one contain normal MBR record:
# fdisk /dev/da0
******* Working on device /dev/da0 *******
parameters extracted from in-core disklabel are:
cylinders=3039 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=3039 heads=255 sectors/track=63 (16065 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 48821472 (23838 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
And here is the mount points on this array:
/dev/da0s1a on / (ufs, local)
/dev/da0s1d on /tmp (ufs, local, noatime, nosuid, soft-updates)
/dev/da0s1f on /usr (ufs, local, soft-updates)
/dev/da0s1e on /var (ufs, local, soft-updates)
The second array contain GPT record created with gpt utility:
# fdisk /dev/da1
******* Working on device /dev/da1 *******
parameters extracted from in-core disklabel are:
cylinders=580527 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=580527 heads=255 sectors/track=63 (16065 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 238 (0xee),(EFI GPT)
start 1, size 4294967295 (2097151 Meg), flag 0
beg: cyl 1023/ head 255/ sector 63;
end: cyl 1023/ head 255/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
Mount point:
/dev/da1p1 on /mnt/mnt2 (ufs, local, noatime, soft-updates)
>
> How? In theory this seems simple, but I can't figure out how to modify
> the slices without fdisk, which won't play ball with the larger size.
>
> And why 248GB anyway? I'd almost be willing to lose the extra .4tb if
> it just stopped at 2TB. Why does it slap back down to 248gb?
>
> NOTE: yes I already understand about PC BIOS and MBR, and not reading
> GPT format. The question is -- how do I make them coexist?
>
> --
> Jo Rhett
> senior geek
> Silicon Valley Colocation
> _______________________________________________
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--
======================================================================
- Best regards, Nikolay Pavlov. <<<-----------------------------------
======================================================================
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