Gentoo Archives: gentoo-user

From: David W Noon <dwnoon@××××××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Boot partitions (WAS: migrating disks (from mounts to disklabels
Date: Tue, 23 Nov 2010 23:14:41
Message-Id: 20101123231402.589e93ad@karnak.local
1 On Tue, 23 Nov 2010 22:10:03 +0100, Mick wrote about Re: [gentoo-user]
2 Boot partitions (WAS: migrating disks (from mounts to disklabels:
4 >On Tuesday 23 November 2010 17:18:56 David W Noon wrote:
5 [snip]
6 >> The number of primary/extended partitions is limited to 4, and the
7 >> number of logical drives is limited by the size of the extended
8 >> partition. If you can fit more partitions onto one drive than
9 >> another, it is because either the drive is bigger or the partitions
10 >> are smaller.
11 >
12 >Errm, not exactly. SCSI/SATAs are limited to 15 (inc. one extended
13 >partition) and old (legacy driven) IDEs are limited to some 63
14 >partitions if I recall correctly. If you use the new libata I think
15 >you only get 15 partitions for SATA/PATA.
17 Well that's a software limitation. I am a little surprised that
18 the limit is so small, as Windows can support 24 drive letters
19 (C: through Z:) assigned to hard drive partitions. Of course,
20 accessing the CD-ROM would then be a bit sporty under Windows.
22 Request an upgrade to the SCSI disk driver.
24 >I know, because I remember some years ago getting a bit
25 >over-enthusiastic with a new SATA drive and fdisk only to end up with
26 >partitions that I couldn't mount ... O_o
28 Like I said, a software limitation.
30 The old PATA drivers had their own internal driver for hard drives.
31 Clearly, it did a more extensive scan of the partition tables than the
32 SCSI driver.
34 For me, it is no problem, because most of my mountable "partitions" are
35 in fact LVM2 logical volumes.
36 --
37 Regards,
39 Dave [RLU #314465]
40 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
41 dwnoon@××××××××.com (David W Noon)
42 *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*


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Subject Author
Re: [gentoo-user] Boot partitions (WAS: migrating disks (from mounts to disklabels Alan McKinnon <alan.mckinnon@×××××.com>