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- From: zlsiial@uts.mcc.ac.uk (A. V. Le Blanc)
- Newsgroups: comp.os.linux
- Subject: Re: scsi disk partitioning and bootstrap questions
- Message-ID: <5723@mccuts.uts.mcc.ac.uk>
- Date: 29 Aug 92 12:29:23 GMT
- References: <1992Aug28.203237.9239@osf.org>
- Reply-To: LeBlanc@mcc.ac.uk
- Organization: Computing Centre, University of Manchester
- Lines: 52
-
- In article <1992Aug28.203237.9239@osf.org> ede@kadabra.osf.org (Ted Ede) writes:
- >
- >1) fdisk 'x'pert mode disks allows up to 63 sectors per track. some
- >larger disks ( > 1GB) have more than 63 sectors per track. Is this
- >limit hard or can it be changed?
-
- The limit is caused by the number of bits in the partition table which
- are available for storing sectors per track: 6 bits. Therefore a
- sector number >63 is not addressable. The whole problem of getting a
- new partition table format understandable by all operating systems
- is going to be a major headache in the future.
-
- >when I print the partition table it looks like
- > Boot Begin Start End Blocks Type
- >/dev/sd1a 2 2 16800 8399 MINIX/fs
- >/dev/sd1b 1 16801 42000 12600 MINIX/swap
- >
- >I assume the the 'Begin' of 2 for /dev/sd1a is skipping the boot
- >block?
-
- Your partition table is rather strange, but never mind! When I wrote
- fdisk I used 'begin' for the start-of-partition encoded in terms of
- geometry, and 'start' for the actual start-of-data encoded in terms
- of sector number. These two numbers need not be the same, though for
- Linux fs and swap partitions any difference is simply wasted.
-
- >I'm also guessing that I can't use this partition for lilo or
- >shoelace?
-
- You can use any partition for lilo. Shoelace is becoming more problematic
- all the time, and is better avoided.
-
- >Can I just make the root partition something other than the
- >first partition, e.g. exchange root and swap and then use lilo? Or must
- >I leave one cylinder at the beginning of the disk empty and start root
- >at the second cylinder.
-
- If you use lilo, you can start root with any sector on the disk, regardless
- of cylinder boundaries.
-
- >3) Which should I use, Lilo or Shoelace? Why? Will either
- >get me a faster boot than using autocon and bootlin?
-
- Shoelace was a holdover from MINIX: it was adapted to Linux to give us the
- possiblilty of booting from the hard disk, but it could not be compiled
- under Linux, was very tempermental, and is probably not going to work
- indefinitely. Shoelace requires that you use the Minix file system, while
- lilo will work with anything. Lilo also uses a great deal less disk space.
-
-
- -- Owen
- LeBlanc@mcc.ac.uk
-