Re: BTRFS partition usage...

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To: Jan Engelhardt <jengelh@...>
Cc: David Miller <davem@...>, <chris.mason@...>, <linux-kernel@...>, <linux-fsdevel@...>, <btrfs-devel@...>
Date: Tuesday, February 12, 2008 - 9:22 pm

On 13-02-08 00:42, Jan Engelhardt wrote:


I haven't followed this thread, but in case it matters -- this sounds fairly 
confused.

Not sure what you're saying, but the MSDOS partition table has its root 
table in the very first sector on the disk, at offset 0x1be = 0x200 - 4 * 
sizeof(struct partition) - 2 (that is, 4 entries at the end of that first 
sector, followed by a 2-byte signature).

That 0x7e00 that you are speaking of sounds somewhat like the _memory_ 
address the BIOS loads that first sector to: 0x7c00. It then jumps there to 
start the ball rolling but 0x7c00 is not an on-disk reality or anything.

MS-DOS partition tables are furthermore fully outside the actual partitions 
themselves and as such I believe not all together relevant to the issue? (as 
said, not following along though...)

Rene
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Messages in current thread:
[ANNOUNCE] Btrfs v0.12 released, Chris Mason, (Wed Feb 6, 1:00 pm)
BTRFS only works with PAGE_SIZE &lt;= 4K, David Miller, (Tue Feb 12, 5:55 pm)
Re: BTRFS only works with PAGE_SIZE &lt;= 4K, Chris Mason, (Tue Feb 12, 6:03 pm)
CRC32C big endian bugs..., David Miller, (Tue Feb 12, 5:23 am)
BTRFS partition usage..., David Miller, (Tue Feb 12, 3:21 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 4:11 am)
Re: BTRFS partition usage..., Chris Mason, (Tue Feb 12, 9:49 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 4:50 pm)
Re: BTRFS partition usage..., Jan Engelhardt, (Tue Feb 12, 10:00 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 7:28 pm)
Re: BTRFS partition usage..., Theodore Tso, (Tue Feb 12, 8:45 pm)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 7:26 pm)
Re: BTRFS partition usage..., Bryan Henderson, (Tue Feb 12, 9:25 pm)
Re: BTRFS partition usage..., Jan Engelhardt, (Tue Feb 12, 7:39 pm)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 9:08 pm)
Re: BTRFS partition usage..., Chris Mason, (Tue Feb 12, 10:08 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 7:33 pm)
Re: BTRFS partition usage..., Jeff Garzik, (Tue Feb 12, 10:10 pm)
Re: BTRFS partition usage..., Szabolcs Szakacsits, (Wed Feb 13, 8:51 pm)
Re: BTRFS partition usage..., Jan Engelhardt, (Tue Feb 12, 10:21 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 7:34 pm)
Re: BTRFS partition usage..., Chris Mason, (Tue Feb 12, 10:35 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 7:35 pm)
Re: BTRFS partition usage..., Christoph Hellwig, (Wed Feb 13, 3:02 am)
Re: BTRFS partition usage..., Jan Engelhardt, (Tue Feb 12, 11:04 am)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 7:38 pm)
Re: BTRFS partition usage..., Jan Engelhardt, (Tue Feb 12, 7:42 pm)
Re: BTRFS partition usage..., Rene Herman, (Tue Feb 12, 9:22 pm)
Re: BTRFS partition usage..., David Miller, (Tue Feb 12, 9:09 pm)
Re: BTRFS partition usage..., Chris Mason, (Tue Feb 12, 12:17 pm)
Re: [ANNOUNCE] Btrfs v0.12 released, David Miller, (Sun Feb 10, 9:12 pm)
Re: [ANNOUNCE] Btrfs v0.12 released, Chris Mason, (Mon Feb 11, 9:42 am)
Re: [ANNOUNCE] Btrfs v0.12 released, David Miller, (Tue Feb 12, 2:43 am)
Re: [ANNOUNCE] Btrfs v0.12 released, Chris Mason, (Tue Feb 12, 9:43 am)