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diff --git a/zarb-ml/mageia-discuss/2012-July/008187.html b/zarb-ml/mageia-discuss/2012-July/008187.html new file mode 100644 index 000000000..48aff40c6 --- /dev/null +++ b/zarb-ml/mageia-discuss/2012-July/008187.html @@ -0,0 +1,238 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML> + <HEAD> + <TITLE> [Mageia-discuss] partitioning bug + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20partitioning%20bug&In-Reply-To=%3Ca1r2d9-2eg.ln1%40psd.motzarella.org%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="008164.html"> + <LINK REL="Next" HREF="008199.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[Mageia-discuss] partitioning bug</H1> + <B>blind Pete</B> + <A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20partitioning%20bug&In-Reply-To=%3Ca1r2d9-2eg.ln1%40psd.motzarella.org%3E" + TITLE="[Mageia-discuss] partitioning bug">0123peter at gmail.com + </A><BR> + <I>Thu Jul 12 14:03:21 CEST 2012</I> + <P><UL> + <LI>Previous message: <A HREF="008164.html">[Mageia-discuss] partitioning bug +</A></li> + <LI>Next message: <A HREF="008199.html">[Mageia-discuss] partitioning bug +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#8187">[ date ]</a> + <a href="thread.html#8187">[ thread ]</a> + <a href="subject.html#8187">[ subject ]</a> + <a href="author.html#8187">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>andre999 wrote: + +><i> blind Pete a écrit : +</I>>><i> andre999 wrote: +</I>>><i> +</I>>><i> +</I>>>><i> blind Pete a écrit : +</I>>>><i> +</I>>>>><i> David W. Hodgins wrote: +</I>>>>><i> +</I>>>>><i> +</I>>>>><i> +</I>>>>>><i> On Fri, 06 Jul 2012 04:03:34 -0400, blind Pete +</I>>>>>><i> <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">0123peter at gmail.com</A>> wrote: +</I>>>>>><i> +</I>>>>>><i> +</I>>>>>><i> +</I>>>>>>><i> Morgan Leijström wrote: +</I>>>>>>><i> +</I>>>>>>><i> +</I>>>>>>>><i> It would also be interesting to know what other tools say. +</I>>>>>>>><i> gparted? +</I>>>>>>>><i> +</I>>>>>>>><i> +</I>>>>>><i> +</I>>>>>><i> +</I>>>>>>><i> Gparted looks pretty. As far as I can see, gparted agrees +</I>>>>>>><i> with what I think things should look like. Gparted and +</I>>>>>>><i> fdisk agree about the number of sectors. (More than you +</I>>>>>>><i> get by multiplying CxHxS.) +</I>>>>>>><i> +</I>>>>>>><i> +</I>>>>>><i> Interesting. I guess it would be best to use 'hdparm -i /dev/sda|grep +</I>>>>>><i> LBAsects" to find out the number of sectors. +</I>>>>>><i> +</I>>>>>><i> Regards, Dave Hodgins +</I>>>>>><i> +</I>>>>>><i> +</I>>>>><i> [<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">root at live</A> ~]# hdparm -i /dev/sda | grep LBA +</I>>>>><i> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=1953523055 +</I>>>>><i> [<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">root at live</A> ~]# +</I>>>>><i> +</I>>>>><i> Same number of sectors as gparted and fdisk report. Number of heads +</I>>>>><i> and sectors per cylinder are just, "it's a big disk". _Posssibly_ +</I>>>>><i> number of cylinders gives a clue about how big. H can be 63 or 255, +</I>>>>><i> depending on mood, and CxHxS should be a little less than max LBA. +</I>>>>><i> +</I>>>>><i> The situation just got worse. The latest work arround is to lie +</I>>>>><i> about how big a sector is. That is called "advanced" formatting. +</I>>>>><i> +</I>>>>><i> +</I>><i> +</I>>>><i> BTW, with all those partitions, I would convert your disk to GPT tables +</I>>>><i> instead of MBR, using gdisk. +</I>>>><i> (gdisk is in core.) +</I>>>><i> +</I>>><i> OK I have installed gdisk and will look at it. How would you rate +</I>>><i> it for maturity? And what else can recognize a gpt disk? +</I>><i> +</I>><i> I would say very mature, even when I started using it (under mdv 2010.0 +</I>><i> or 2010.1) +</I>><i> The developer says the "hybid" option which simulates MBR for Msw is +</I>><i> risky, but even that I found very stable and predictable +</I> +I let it loose on my test machine. It has Lilo on the mbr. Mageia 1 +with Grub in its root partition, Mageia 2 with Grub in its root +partition, and Ubuntu 10.04.4 with Grub 2 in its root partition. + +Converting to gpt confused Ubuntu's Grub 2. + +Experimenting with a hybrid system, converting a primary +to a logical, adding a new primary, and renumbering confused +lots of things. + +It was only the test computer. + +>><i> Grub? +</I>>><i> +</I>><i> Yes, since 1.97 patched for GPT, as used in mdv and fedora (at least) +</I>><i> when I started using GPT. +</I>><i> Mageia has always used this version. +</I>>><i> Grub2? +</I>>><i> +</I>><i> Definitely +</I> +I managed to confuse it. Posibly by having it installed in the +root partition. + +>><i> Lilo? +</I>>><i> +</I>><i> Not sure. I think newer versions do. +</I> +Mostly works. The mbr code just jumps to a hardcoded sector +address and loads the real code from what is normally /etc/map. + +>><i> The Mageia installer? +</I>>><i> +</I>><i> I didn't have a problem. I did an upgrade install from mdv2010.2 to +</I>><i> mga1, and could read the other partitions to set up fstab. +</I>><i> Sometime before mga1 was available, I had a problem which corrupted my +</I>><i> system, and made it unbootable. It took me a while to get around that, +</I>><i> as I didn't want to loose my uncorrupted partitions. I ended up fixing +</I>><i> it with SystemRescueCD (it contains a partition recovery tool called +</I>><i> testdisk.) I was able to reinstall mdv. I may have formatted / with +</I>><i> SystemRescueCD. At that point I had a "hybrid" format simulating MBR +</I>><i> for systems not aware of GPT. +</I> +Is there any option in the installer to turn the disk into a gpt disk? + +>><i> Other installers? +</I>>><i> +</I>>><i> Other operating systems? +</I>>><i> +</I>><i> According to what I have read, most other major distros handle GPT +</I>><i> nicely. The Linux kernel does. +</I>><i> Msw 32-bit does not, but can work with gdisks' "hybrid" format, which +</I>><i> puts an MBR table at the end of the first sector (a space not used by +</I>><i> GPT). It is a little tricky to set up, but initially I had it working. +</I>><i> Recently I haven't been bothered to get it working again. +</I>><i> Msw 64-bit is GPT-aware, but I have read that it works only on EFT +</I>><i> hardware, which has a special BIOS. (Incompatible with Msw 32-bit.) It +</I>><i> may be just that it is the default installation. +</I>><i> MacOS handles GPT, but I'm not sure of the restrictions if any. Is was +</I>><i> an early adopter. +</I>><i> *BSD systems should handle GPT just like Linux. +</I>>>><i> It will make your disk more stable. +</I>>>><i> It uses a 128 partition table,with a backup table at the end of the +</I>>>><i> drive. No such thing as "extended" partitions. +</I>>>><i> It takes less space than the ms-compatible MBR partition tables. +</I>>>><i> The only trick is that you need to leave space for the backup table (34 +</I>>>><i> 512-byte sectors). +</I>>>><i> If you change your mind, you can convert back painlessly. +</I>>>><i> I've used GPT for over 2 years, including converting back and forth a +</I>>>><i> few times at first. +</I>>>><i> +</I>>>><i> To convert, you'll have to boot to a live disk, preferably with gdisk. +</I>>>><i> I use systemRescueCD for that. <A HREF="http://www.sysresccd.org/">http://www.sysresccd.org/</A> +</I>>>><i> The latest stable version is 379 Mib, usable from CD or USB key. +</I>>>><i> I don't know if a Mageia live cd, or Mageia DVD in rescue mode might +</I>>>><i> work. +</I>>>><i> +</I>>><i> In Mageia 1 the installer pulled it from the net rather than from +</I>>><i> the local iso, so it was not prepackaged. +</I>><i> +</I>><i> I installed mga1 from DVD. This upgrade went very smoothly. +</I>><i> +</I>><i> I did have a problem changing partition parameters with diskdrake under +</I>><i> mga1, not long after installing it, shortly after mga1 was released. +</I>><i> Luckily I was testing things, so I didn't loose anything important. But +</I>><i> everything was lost on the partition in question. I then tried +</I>><i> reformatting the partition with diskdrake, and it wouldn't work. I had +</I>><i> to use SystemRescueCD (with gparted). +</I>><i> I strongly suspect it was due to my having a "hybrid" format. I think +</I>><i> that at least at that point, diskdrake (or whatever it uses) would see +</I>><i> the MBR table, and classify the disk as MBR. While still getting the +</I>><i> partition location parameters from the GPT table. (The simulated MBR +</I>><i> table puts most partitions in a large "foreign" partition. The +</I>><i> corrupted partition was not in the MBR table. And no other partition +</I>><i> was affected.) +</I>><i> +</I>><i> Note that I have never had a problem simply accessing (read or write) a +</I>><i> GPT partition on mdv or mga. +</I>><i> +</I>><i> Also, initially I used gdisk to format usb drives (but no hybrid MBR +</I>><i> table), and have never had a problem on those disks with diskdrake or +</I>><i> any other mdv or mga tools. +</I>><i> +</I>><i> BTW, I installed gdisk from upstream on mdv, and first imported gdisk to +</I>><i> Mageia. +</I>>>><i> Just in case you might be interested +</I>>>><i> +</I>>><i> I'm interested. +</I>><i> +</I>><i> You will probably find this interesting :) +</I>><i> <A HREF="http://en.wikipedia.org/wiki/GUID_Partition_Table">http://en.wikipedia.org/wiki/GUID_Partition_Table</A> +</I> +Thanks. + +-- +blind Pete +Sig goes here... + +</PRE> + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="008164.html">[Mageia-discuss] partitioning bug +</A></li> + <LI>Next message: <A HREF="008199.html">[Mageia-discuss] partitioning bug +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#8187">[ date ]</a> + <a href="thread.html#8187">[ thread ]</a> + <a href="subject.html#8187">[ subject ]</a> + <a href="author.html#8187">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://www.mageia.org/mailman/listinfo/mageia-discuss">More information about the Mageia-discuss +mailing list</a><br> +</body></html> |