profuse apologies if this is a repeat post, but I've
been battling the postfix(1) installation and know a
bunch of e-mails bounced for assorted/silly reasons
(the latest being that `/etc/resolv.conf' was not
readable by the `postfix' user --- not that `postfix'
ever actually said anything like that (or gave a hint),
I had to use strace(1) to figure it out .... ;-\ ).
------- Forwarded Message
Date: Wed, 26 May 2004 02:34:25 +0200
Subject: Re: [ILUG] dying hard disc - upgrade questions?
To: Irish Linux Users Group <ilug at linux.ie>
From: Brian Foster <ilug at blf.utvinternet.ie>
In-Reply-To: Message from Paul Jakma <paul at clubi.ie>
of "Tue, 25 May 2004 21:30:12 BST." <Pine.LNX.4.58.0405252121430.2606 at fogarty.jakma.org>
| Date: Tue, 25 May 2004 21:30:12 +0100 (IST)
| From: Paul Jakma <paul at clubi.ie>
| On Tue, 25 May 2004, Brian Foster wrote:
| > + extended partitions should only be be the last in each table
| > (and indeed, in the last (4th) slot of the MBRs table);
| Hmm, really? I've often created extend partitions in between primary
YES. remember, I was asking about “best practice‟
for a collection of s/w (not all Linux); _not_ what
was possible. and above I was talking about order
in the MBR's partition table, _not_ the physical
arrangement of the partitions on the media. e.g.,
in the setup I now have, it is physically arranged
as: hdb1 (primary) ≡ 0 ..N₁ (cylinders),
hdb2 (primary) ≡ N₁+1..N₂ (cylinders),
hdb3 (primary) ≡ N₃+1..End (cylinders),
and hdb4 (extended) ≡ N₂+1..N₃ (cylinders);
│ hdb1 │ hdb2 │ hdb4 │ hdb3 │
0 N₁ N₂ N₃ End
the extended hdb4 physically occurs before the
primary hdb3, opposite of the order in the table.
also, whilst I didn't try too hard, the SUSE 9.1
installer would not seem want to let me even create
a primary after the extended in the MBR's table.
| > + there is an indeterminate number of logical partitions per
| > extended;
| There may be limits in how many an OS supports though, cant remember
| if Linux has such a limit. It definitely had a limit in how many
| partitions can be on a disk (least for scsi disks - was limited to 15
| - probably still is).
*sigh* yep. problem is, there seems to be no
agreement on what these limits are (even allowing
for changes over time and different s/w (O/Ses),
this is amazing!); and quite a number of docs don't
even discuss the matter at all.
I was maybe unclear here: when I said “indeterminate‟
I meant I could not determine what a “safe‟ maximum
was; where again, “safe‟ means “works with‟ arbitrary
s/w (not just Linux).
------- End of Forwarded Message
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