Gentoo Archives: gentoo-user

From: Michael Hampicke <mh@××××.biz>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] fdisk warnings during install; questions
Date: Fri, 10 May 2013 07:52:22
Message-Id: 518CA725.5080001@hadt.biz
In Reply to: [gentoo-user] fdisk warnings during install; questions by Walter Dnes
1 Am 10.05.2013 03:11, schrieb Walter Dnes:
2 > I'm using the 20130207 install iso. This is to enable me to get a
3 > *REALLY* predictable NIC name, namely eth0, but I digress. The 2
4 > warnings I get are...
5 >
6 > 1)
7 >> WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util
8 >> fdisk doesn't support GPT. Use GNU Parted.
9 >
10 > I've repartitioned it 3 or 4 times, but it still comes up with that
11 > error when I fire up fdisk. Is it a problem, and if so, can I dd a few
12 > sectors to remove whatever it's complaining about?
13 >
14
15 fdisk does not support GPT disks, use cgdisk or parted (as the error
16 message clearly states)
17
18 >
19 > 2)
20 >> The device presents a logical sector size that is smaller than the
21 >> physical sector size. Aligning to a physical sector (or optimal I/O)
22 >> size boundary is recommended, or performance may be impacted.
23 >
24 > The fdisk "p" command gives the following output header
25 >
26 >> Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
27 >> 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
28 >> Units = sectors of 1 * 512 = 512 bytes
29 >> Sector size (logical/physical): 512 bytes / 4096 bytes
30 >> I/O size (minimum/optimal): 4096 bytes / 4096 bytes
31 >
32 > The fdisk default seems to be to start partition 1 at sector 2048. I
33 > don't know the hardware side of disks. Is that OK.
34 >
35
36 This will be solved when using a partitioner that supports GTP, as
37 stated above.

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Replies

Subject Author
Re: [gentoo-user] fdisk warnings during install; questions Neil Bothwick <neil@××××××××××.uk>