A question about x86 SunFire boxes

From: Gary Brett (gary.brett@fidessa.com)
Date: Mon Jun 11 2007 - 04:48:48 EDT


Hi Sun Managers

I have a quick question about i386 based SunFire boxes (specifically the x4100
and v40z). The disks in these boxes always have slice 8 and 9 set up in
addtition to the 7 standard slices i.e. ....

Part Tag Flag Cylinders Size Blocks
  0 unassigned wm 0 0 (0/0/0) 0
  1 unassigned wm 0 0 (0/0/0) 0
  2 backup wu 0 - 17844 136.70GB (17845/0/0) 286679925
  3 unassigned wm 0 0 (0/0/0) 0
  4 unassigned wm 0 0 (0/0/0) 0
  5 unassigned wm 0 0 (0/0/0) 0
  6 unassigned wm 1 - 17844 136.69GB (17844/0/0) 286663860
  7 unassigned wm 0 0 (0/0/0) 0
  8 boot wu 0 - 0 7.84MB (1/0/0) 16065
  9 unassigned wm 0 0 (0/0/0) 0

My question is this ....what exactly are these for and specifically slice 8
that is marked up as "boot" and occupies the first cylinder of the disk. My
initial thought was that this was some kind of boot sector, but this 1 cyl
slice exists on all disks not just the root/bootable one ? Does it need to be
there occupying a cylinder or can I trash that slice and use the cylinder in
another slice.

Any help on this would be greatly appreciated

Gary

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