I use 'sfdisk -d /dev/sda > ptblfile' and
'sfdisk /dev/sda < ptblfile'
to backup, create or modify LUN partition tables. It's non-interactive
and lends itself to scripting.
Various man pages says Linux ignores partition geometry but the
partitioning tools (sfdisk and fdisk) issue warnings if my partitions
don't align with their view of "cylinder" boundaries.
Will it matter that I don't bother to align LUN partitions on "cylinder"
boundaries? I want to make fuller use of the disk space and the
imaginary geometry imposed by the partitioning tools wastes space at the
ends of the LUN and is a pain to calculate just to keep 'em quiet.
On a related note, what's the lowest 0-relative sector number at which
to start partition 1? I want to leave sector 0 thru n for the partition
table and whatever sectors zipl needs.
John Romanowski
z/VM - zLinux Support
NYS CIO/Office for Technology
(518)485-9555
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